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Christopher H. Dietrich
Illinois Natural History Survey Prairie Research Institute University of Illinois Champaign IL61820USA

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Research article
Published: 28 June 2021 in Cladistics
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“Candidatus Sulcia muelleri” (Sulcia) is a diverse lineage of intracellular nutritional endosymbiotic bacteria strictly associated with auchenorrhynchous hemipteran insects. Sulcia has undergone long-term codiversification with its insect hosts but the phylogeny of these endosymbionts, their relationships to other bacteria, and the extent of their occurrence within various groups of Auchenorrhyncha remain inadequately explored. Comprehensive phylogenetic analyses of Sulcia and related bacteria were performed to elucidate its position relative to other members of Phylum Bacteroidetes and the degree of congruence to the phylogeny of its auchenorrhynchous hosts. Maximum likelihood (ML) and maximum parsimony (MP) analyses of Flavobacteriales based on genomic data from 182 bacterial strains recover a monophyletic Sulcia within a larger clade of flavobacterial insect endosymbionts, closely related to Weeksellaceae. Molecular divergence time analysis of Sulcia dates the origin of Sulcia at approximately 339.95 million years ago (Myr) and the initial divergence within Sulcia at approximately 256.91 Myr but these are considered underestimates due to the tendency for endosymbionts to evolve at higher rates compared to their free-living relatives. Screening of 96 recently sequenced hemipteran transcriptomes revealed that 73 of these species, all Auchenorrhyncha, harbored Sulcia. Phylogenetic analysis of 131 orthologous genes plus 16S rRNA for 101 Sulcia strains, representing six fulgoroid families and all the families of Cicadomorpha except Tettigarctidae, recover largely congruent phylogenies between Sulcia and Auchenorrhyncha. The phylogeny of Sulcia strongly supports the superfamily relationships Fulgoroidea + (Cicadoidea + (Cercopoidea + Membracoidea)). Relationships within individual superfamilies are also largely concordant, with the few areas of apparent incongruence between Sulcia and insect genes attributable to low branch support in one or both datasets. These results suggest that analysis of Sulcia phylogeny may contribute to resolution of contentious aspects of Auchenorrhyncha phylogeny.

ACS Style

Yanghui Cao; Christopher H. Dietrich. Phylogenomics of flavobacterial insect nutritional endosymbionts with implications for Auchenorrhyncha phylogeny. Cladistics 2021, 1 .

AMA Style

Yanghui Cao, Christopher H. Dietrich. Phylogenomics of flavobacterial insect nutritional endosymbionts with implications for Auchenorrhyncha phylogeny. Cladistics. 2021; ():1.

Chicago/Turabian Style

Yanghui Cao; Christopher H. Dietrich. 2021. "Phylogenomics of flavobacterial insect nutritional endosymbionts with implications for Auchenorrhyncha phylogeny." Cladistics , no. : 1.

Journal article
Published: 19 June 2021 in Zoologischer Anzeiger
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Nephotettix leafhoppers are widely distributed and some members of this genus are important vectors of rice pathogens. Species delimitation in this group has proven difficult because traditional morphological characters tend to exhibit substantial variation within populations, and the morphology-based species classification of this genus has not previously been tested using molecular data. This study analysed DNA sequence data from three mitochondrial genes (COI, Cytb and 16S) and two nuclear genes (ITS2, H3) to infer the phylogenetic relationships and status of five previously recognized Nephotettix species and compare the performance of different molecular species-delimitation methods using single loci and multiple loci. The analysis supports the monophyly of Nephotettix and divided the included haplotypes into five well-supported subclades. Data from the three mitochondrial genes were usually consistent with morphology in supporting recognition of five species. However, data from the two nuclear genes usually lumped the haplotypes into a single species, probably due to the relatively small numbers of variable and parsimony-informative nucleotide positions present in these loci. The jMOTU and ABGD analyses of single mitochondrial loci gave the most consistent results with morphology. Considering the variable results yielded by various methods employing single loci, the BPP method, which combines data from multiple loci, may be more reliable in Nephotettix.

ACS Style

Yao Gao; Yalin Zhang; Christopher H. Dietrich; Yani Duan. Phylogenetic analyses and species delimitation of Nephotettix Matsumura (Hemiptera: Cicadellidae: Deltocephalinae: Chiasmini) in China based on molecular data. Zoologischer Anzeiger 2021, 293, 202 -214.

AMA Style

Yao Gao, Yalin Zhang, Christopher H. Dietrich, Yani Duan. Phylogenetic analyses and species delimitation of Nephotettix Matsumura (Hemiptera: Cicadellidae: Deltocephalinae: Chiasmini) in China based on molecular data. Zoologischer Anzeiger. 2021; 293 ():202-214.

Chicago/Turabian Style

Yao Gao; Yalin Zhang; Christopher H. Dietrich; Yani Duan. 2021. "Phylogenetic analyses and species delimitation of Nephotettix Matsumura (Hemiptera: Cicadellidae: Deltocephalinae: Chiasmini) in China based on molecular data." Zoologischer Anzeiger 293, no. : 202-214.

Journal article
Published: 01 June 2021 in Insects
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Xestocephalus Van Duzee is among the most common and widespread genera of Cicadellidae in the temperate and tropical regions of the world. In the present study, 205 specimens of the genus Xestocephalus were collected in Thailand, whereas only a single species of the genus was recorded previously using Malaise trap field sampling, studied by comparative morphology. Seventeen species were recognized, including twelve new species: X. binarius sp. nov., X. chrysanthemum sp. nov., X. cowboyocreus sp. nov., X. densprint sp. nov., X. dimiprocessus sp. nov., X. exproiecturus sp. nov., X. gracilus sp. nov., X. limpidissimus sp. nov., X. malleus sp. nov., X. nonattribus sp. nov., X. recipinams sp. nov., and X. tenusis Liang sp. nov. Four species were recorded in Thailand for the first time: Xestocephalus abyssinicus Heller and Linnavuori, Xestocephalus asper Linnavuori, Xestocephalus ishidae Matsumura, and Xestocephalus toroensis Matsumura. Detailed morphological descriptions of all 17 species are given; photographs of external habitus and male genitalia of the species from Thailand are provided. A checklist of species of the genus is also given, and a key to all Thailand Xestocephalus species is also provided.

ACS Style

Zonglei Liang; Christopher Dietrich; Wu Dai. Remarkable Species Diversity of the Leafhopper Genus Xestocephalus (Hemiptera: Cicadellidae: Aphrodinae) in Thailand. Insects 2021, 12, 514 .

AMA Style

Zonglei Liang, Christopher Dietrich, Wu Dai. Remarkable Species Diversity of the Leafhopper Genus Xestocephalus (Hemiptera: Cicadellidae: Aphrodinae) in Thailand. Insects. 2021; 12 (6):514.

Chicago/Turabian Style

Zonglei Liang; Christopher Dietrich; Wu Dai. 2021. "Remarkable Species Diversity of the Leafhopper Genus Xestocephalus (Hemiptera: Cicadellidae: Aphrodinae) in Thailand." Insects 12, no. 6: 514.

Cover image
Published: 25 May 2021 in Diversity and Distributions
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The cover image relates to the Research Article https://doi.org/10.1111/ddi.13254 “Biogeographical evaluation and conservation assessment of arboreal leafhoppers in the Mexican Transition Zone biodiversity hotspot”. nymph of Jikradia sp. from Villamar, Michoacán, México by Adilson Pinedo and Ricardo Arredondo

ACS Style

Jorge Adilson Pinedo‐Escatel; Juvenal Aragón‐Parada; Christopher H. Dietrich; Gustavo Moya‐Raygoza; James N. Zahniser; Liberato Portillo. Front Cover. Diversity and Distributions 2021, 27, 1 .

AMA Style

Jorge Adilson Pinedo‐Escatel, Juvenal Aragón‐Parada, Christopher H. Dietrich, Gustavo Moya‐Raygoza, James N. Zahniser, Liberato Portillo. Front Cover. Diversity and Distributions. 2021; 27 (6):1.

Chicago/Turabian Style

Jorge Adilson Pinedo‐Escatel; Juvenal Aragón‐Parada; Christopher H. Dietrich; Gustavo Moya‐Raygoza; James N. Zahniser; Liberato Portillo. 2021. "Front Cover." Diversity and Distributions 27, no. 6: 1.

Journal article
Published: 16 March 2021 in Pathogens
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Phytoplasmas are obligate transkingdom bacterial parasites that infect a variety of plant species and replicate in phloem-feeding insects in the order Hemiptera, mainly leafhoppers (Cicadellidae). The insect capacity in acquisition, transmission, survival, and host range directly determines the epidemiology of phytoplasmas. However, due to the difficulty of insect sampling and the lack of follow-up transmission trials, the confirmed phytoplasma insect hosts are still limited compared with the identified plant hosts. Recently, quantitative polymerase chain reaction (qPCR)-based quick screening of 227 leafhoppers collected in natural habitats unveiled the presence of previously unknown phytoplasmas in six samples. In the present study, 76 leafhoppers, including the six prescreened positive samples, were further examined to identify and characterize the phytoplasma strains by semi-nested PCR. A total of ten phytoplasma strains were identified in leafhoppers from four countries including South Africa, Kyrgyzstan, Australia, and China. Based on virtual restriction fragment length polymorphism (RFLP) analysis, these ten phytoplasma strains were classified into four distinct ribosomal (16Sr) groups (16SrI, 16SrIII, 16SrXIV, and 16SrXV), representing five new subgroups (16SrI-AO, 16SrXIV-D, 16SrXIV-E, 16SrXIV-F, and 16SrXV-C). The results strongly suggest that the newly identified phytoplasma strains not only represent new genetic subgroup lineages, but also extend previously undiscovered geographical distributions. In addition, ten phytoplasma-harboring leafhoppers belonged to seven known leafhopper species, none of which were previously reported insect vectors of phytoplasmas. The findings from this study provide fresh insight into genetic diversity, geographical distribution, and insect host range of phytoplasmas. Further transmission trials and screening of new potential host plants and weed reservoirs in areas adjacent to collection sites of phytoplasma harboring leafhoppers will contribute to a better understanding of phytoplasma transmission and epidemiology.

ACS Style

Wei Wei; Valeria Trivellone; Christopher Dietrich; Yan Zhao; Kristi Bottner-Parker; Algirdas Ivanauskas. Identification of Phytoplasmas Representing Multiple New Genetic Lineages from Phloem-Feeding Leafhoppers Highlights the Diversity of Phytoplasmas and Their Potential Vectors. Pathogens 2021, 10, 352 .

AMA Style

Wei Wei, Valeria Trivellone, Christopher Dietrich, Yan Zhao, Kristi Bottner-Parker, Algirdas Ivanauskas. Identification of Phytoplasmas Representing Multiple New Genetic Lineages from Phloem-Feeding Leafhoppers Highlights the Diversity of Phytoplasmas and Their Potential Vectors. Pathogens. 2021; 10 (3):352.

Chicago/Turabian Style

Wei Wei; Valeria Trivellone; Christopher Dietrich; Yan Zhao; Kristi Bottner-Parker; Algirdas Ivanauskas. 2021. "Identification of Phytoplasmas Representing Multiple New Genetic Lineages from Phloem-Feeding Leafhoppers Highlights the Diversity of Phytoplasmas and Their Potential Vectors." Pathogens 10, no. 3: 352.

Biodiversity research
Published: 13 March 2021 in Diversity and Distributions
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Aims Mexico harbours a diverse fauna comprising more than 1,400 leafhopper species, 60% of which appear to be strictly endemic, with many apparently restricted to particular habitats and host plants. The aims of this study were to identify areas of high species richness and endemism, and determine the biogeographic affinities of species in the diverse arboreal tribe Athysanini to provide data useful for conservation prioritization. Location Mexico. Methods A data set of 643 historical occurrence records based on authoritatively identified specimens from museums, recent fieldwork, literature and digital repositories was analysed. Analyses of species richness and areas of endemism were conducted using geographic information systems. Results A total of 164 species belonging of 50 genera were included, of which 145 species of 31 genera are considered to be endemic. The Mexican state of Guerrero yielded the most species records (48%). The highest numbers of taxa and endemic species were concentrated along the Mexican Transition Zone (MTZ) within which the Trans‐Mexican Volcanic Belt (TVB) province had the most species records. Endemicity analyses showed two different geographical patterns but similar species richness weights with overlapping values over the MTZ. Distribution across vegetation types was not uniform, with most athysanine species concentrated in the dry tropical forest (65%). Species were documented at elevations between sea level and 3,200 m a.s.l. with three altitudinal preference classes. Conservation assessments applying IUCN criteria categorized a majority of species (145) as endangered or critically endangered. Main conclusions Our findings suggest that most identified areas of high species richness throughout the territory have predominantly endemic taxa. Distributional patterns found are non‐random, influenced by richness and endemism values over the TVB province and in the MTZ with a variable dispersion among species. Data highlight a greatly threatened status by habitat loss, remarking an urgent need for an improved conservation framework.

ACS Style

Jorge Adilson Pinedo‐Escatel; Juvenal Aragón‐Parada; Christopher H. Dietrich; Gustavo Moya‐Raygoza; James N. Zahniser; Liberato Portillo. Biogeographical evaluation and conservation assessment of arboreal leafhoppers in the Mexican Transition Zone biodiversity hotspot. Diversity and Distributions 2021, 27, 1051 -1065.

AMA Style

Jorge Adilson Pinedo‐Escatel, Juvenal Aragón‐Parada, Christopher H. Dietrich, Gustavo Moya‐Raygoza, James N. Zahniser, Liberato Portillo. Biogeographical evaluation and conservation assessment of arboreal leafhoppers in the Mexican Transition Zone biodiversity hotspot. Diversity and Distributions. 2021; 27 (6):1051-1065.

Chicago/Turabian Style

Jorge Adilson Pinedo‐Escatel; Juvenal Aragón‐Parada; Christopher H. Dietrich; Gustavo Moya‐Raygoza; James N. Zahniser; Liberato Portillo. 2021. "Biogeographical evaluation and conservation assessment of arboreal leafhoppers in the Mexican Transition Zone biodiversity hotspot." Diversity and Distributions 27, no. 6: 1051-1065.

Journal article
Published: 10 March 2021 in Royal Society Open Science
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Tropical forests cover 7% of the earth's surface and hold 50% of known terrestrial arthropod species. Alarming insect declines resulting from human activities have recently been documented in temperate and tropical ecosystems worldwide, but reliable data from tropical forests remain sparse. The sap-sucking tribe Athysanini is one herbivore group sensitive to anthropogenic perturbation and the largest within the diverse insect family Cicadellidae distributed in America's tropical forests. To measure the possible effects of deforestation and related activities on leafhopper biodiversity, a survey of 143 historic collecting localities was conducted to determine whether species documented in the Mexican dry tropical forests during the 1920s to 1940s were still present. Biostatistical diversity analysis was performed to compare historical to recent data on species occurrences. A data matrix of 577 geographical records was analysed. In total, 374 Athysanini data records were included representing 115 species of 41 genera. Historically, species richness and diversity were higher than found in the recent survey, despite greater collecting effort in the latter. A strong trend in species decline was observed (−53%) over 75 years in this endangered seasonally dry ecosystem. Species completeness was dissimilar between historic and present data. Endemic taxa were significantly less important and represented in the 1920s–1940s species records. All localities surveyed in the dry tropical forest are disturbed and reduced by modern anthropogenic processes. Mexico harbours highly endemic leafhopper taxa with a large proportion of these inhabiting the dry forest. These findings provide important data for conservation decision making and modelling of distribution patterns of this threatened seasonally dry tropical ecosystem.

ACS Style

J. A. Pinedo-Escatel; G. Moya-Raygoza; C. H. Dietrich; J. N. Zahniser; L. Portillo. Threatened Neotropical seasonally dry tropical forest: evidence of biodiversity loss in sap-sucking herbivores over 75 years. Royal Society Open Science 2021, 8, 1 .

AMA Style

J. A. Pinedo-Escatel, G. Moya-Raygoza, C. H. Dietrich, J. N. Zahniser, L. Portillo. Threatened Neotropical seasonally dry tropical forest: evidence of biodiversity loss in sap-sucking herbivores over 75 years. Royal Society Open Science. 2021; 8 (3):1.

Chicago/Turabian Style

J. A. Pinedo-Escatel; G. Moya-Raygoza; C. H. Dietrich; J. N. Zahniser; L. Portillo. 2021. "Threatened Neotropical seasonally dry tropical forest: evidence of biodiversity loss in sap-sucking herbivores over 75 years." Royal Society Open Science 8, no. 3: 1.

Review article
Published: 02 January 2021 in Journal of Asia-Pacific Entomology
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Two genera, Dayus Mahmood, 1967 and Znana Dworakowska, 1994 of the leafhopper tribe Empoascini (Hemiptera: Cicadellidae: Typhlocybinae) are reviewed. One new species of each genus, Dayus furcatus sp. nov. and Znana furca sp. nov., are described from Thailand. A checklist and distribution summary of Dayus Mahmood species is given. Male habitus photos and illustrations of male genitalia of the two new species and notes on allied species are also provided.

ACS Style

Ye Xu; Christopher H. Dietrich; Dao-Zheng Qin. Description of new species of two genera Dayus Mahmood and Znana Dworakowska from Thailand (Hemiptera: Cicadellidae: Typhlocybinae). Journal of Asia-Pacific Entomology 2021, 24, 229 -234.

AMA Style

Ye Xu, Christopher H. Dietrich, Dao-Zheng Qin. Description of new species of two genera Dayus Mahmood and Znana Dworakowska from Thailand (Hemiptera: Cicadellidae: Typhlocybinae). Journal of Asia-Pacific Entomology. 2021; 24 (1):229-234.

Chicago/Turabian Style

Ye Xu; Christopher H. Dietrich; Dao-Zheng Qin. 2021. "Description of new species of two genera Dayus Mahmood and Znana Dworakowska from Thailand (Hemiptera: Cicadellidae: Typhlocybinae)." Journal of Asia-Pacific Entomology 24, no. 1: 229-234.

Journal article
Published: 16 December 2020 in Annals of the Entomological Society of America
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The association between insect herbivores and vascular plants represents one of the greatest success stories in terrestrial evolution. Specific mechanisms generating diversity in the association remain poorly understood, but it has become increasingly clear that microbes play important roles in mediating plant–insect interactions. Previous research on phytoplasmas (Acholeplasmatales: Acholeplasmataceae), a diverse group of plant-pathogenic bacteria, and their hemipteran insect vectors suggests that this system provides a new model for understanding how interactions among distantly related but ecologically associated groups of organisms can drive evolutionary diversification. Phytoplasma infections affect the phenotypes of both plants and vectors, altering functional traits (e.g., diet breadth) and mediating host shifts which may, in turn, alter genetic and phylogenetic patterns. This review highlights previous research on the functional ecology and phylogenetic components of phytoplasma-plant-vector (PPV) associations relevant to the evolutionary diversification of this system. Although phytoplasmas and their hosts occur in most terrestrial biomes and have evolved together over the past 300+ million years, major gaps in knowledge of PPV associations remain because most prior research on the system focused on strategies for mitigating effects of phytoplasma diseases in agroecosystems. Study of this system within a broader evolutionary context could help elucidate mechanisms by which interactions between insect herbivores, microbes, and plants drive biological diversification and also help predict the emergence of diseases affecting agriculture. Future research should more thoroughly document PPV associations in natural habitats, examine the relative prevalence of cospeciation versus host shifts in this system, and test possible macroevolutionary consequences of host manipulation by phytoplasmas.

ACS Style

V Trivellone; C H Dietrich. Evolutionary Diversification in Insect Vector–Phytoplasma–Plant Associations. Annals of the Entomological Society of America 2020, 114, 137 -150.

AMA Style

V Trivellone, C H Dietrich. Evolutionary Diversification in Insect Vector–Phytoplasma–Plant Associations. Annals of the Entomological Society of America. 2020; 114 (2):137-150.

Chicago/Turabian Style

V Trivellone; C H Dietrich. 2020. "Evolutionary Diversification in Insect Vector–Phytoplasma–Plant Associations." Annals of the Entomological Society of America 114, no. 2: 137-150.

Journal article
Published: 10 November 2020 in Zootaxa
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Recent collecting in northern Vietnam yielded specimens of several new leafhopper species, two of which represent new monotypic genera, and several additional species not previously recorded from Vietnam. The two new genera (Hochiminus n. gen. and Pseudocestius n. gen.) and 15 new species (Abrus digitatus n. sp., Aeternus ninhbinhensis n. sp., Drabescoides bispinosa n. sp., Tenompoella vietnamensis n. sp., Uzelina (Uzelina) vietnamensis sp. n., Hochiminhus tamdaoensis n. sp., Pseudocestius cucphuongensis n. sp., Phlogothamnus pseudorugosus n. sp., Scaphoidella albopunctata n. sp., Bundera onukiiformis n. sp., Carinata arcuata n. sp., Traiguma hamocauda n. sp., Signoretia tamdaoensis n. sp., Amrasca (Quartasca) curvata n. sp., Amrasca (Quartasca) excavata n. sp.) are described and illustrated and comparative notes are provided. An additional 28 species representing 20 genera are newly recorded from Vietnam. Most of the latter were previously recorded only from southern China. The enigmatic species, Tardrabassus pakneunensis Dai & Dietrich, previously known from two males collected in Laos in 1918, is newly recorded from Vietnam based on recently collected female specimens. The ovipositor structure of the female confirms placement of Tardrabassus in Iassinae. The female pregenital sternite and ovipositor of Hamulotettix ungulatus Dai & Zhang are also illustrated for the first time. A new synonymy is also proposed: Ujna consors Distant, 1908 equals Mileewa puerana Yang & Meng, 2010, n. syn.

ACS Style

Christopher H. Dietrich; Huong T. T. Nguyen; Hong Thai Pham. New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam. Zootaxa 2020, 4877, 241 -273.

AMA Style

Christopher H. Dietrich, Huong T. T. Nguyen, Hong Thai Pham. New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam. Zootaxa. 2020; 4877 (2):241-273.

Chicago/Turabian Style

Christopher H. Dietrich; Huong T. T. Nguyen; Hong Thai Pham. 2020. "New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam." Zootaxa 4877, no. 2: 241-273.

Journal article
Published: 10 October 2020 in Insects
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To explore the characteristics of mitogenomes and reveal phylogenetic relationships of the tribes of Zyginellini and Typhlocybini in Typhlocybinae, mitogenomes of two species of the Zyginellini, Parazyginella tiani and Limassolla sp., were sequenced. Mitogenomes of both species contain 13 protein-coding genes (PCGs), 22 transfer RNA genes (tRNAs), two ribosomal RNA genes (rRNAs) and a large non-coding region (A + T-rich region). These characteristics are similar to other Membracoidea mitogenomes. All PCGs initiate with the standard start codon of ATN and terminate with the complete stop codon of TAA/G or with an incomplete T codon. All tRNAs have the typical clover-leaf structure, except trnS1 which has a reduced DHU arm and the acceptor stem of trnR is 5 or 6 bp in some species, an unusual feature here reported for the first time in Typhlocybinae. The A + T-rich region is highly variable in length and in numbers of tandem repeats present. Our analyses indicate that nad6 and atp6 exhibit higher evolutionary rates compared to other PCGs. Phylogenetic analyses by both maximum likelihood and Bayesian methods based on 13 protein-coding genes of 12 species of Typhlocybinae suggest that Zyginellini are paraphyletic with respect to Typhlocybini.

ACS Style

Xian Zhou; Christopher H. Dietrich; Min Huang. Characterization of the Complete Mitochondrial Genomes of Two Species with Preliminary Investigation on Phylogenetic Status of Zyginellini (Hemiptera: Cicadellidae: Typhlocybinae). Insects 2020, 11, 684 .

AMA Style

Xian Zhou, Christopher H. Dietrich, Min Huang. Characterization of the Complete Mitochondrial Genomes of Two Species with Preliminary Investigation on Phylogenetic Status of Zyginellini (Hemiptera: Cicadellidae: Typhlocybinae). Insects. 2020; 11 (10):684.

Chicago/Turabian Style

Xian Zhou; Christopher H. Dietrich; Min Huang. 2020. "Characterization of the Complete Mitochondrial Genomes of Two Species with Preliminary Investigation on Phylogenetic Status of Zyginellini (Hemiptera: Cicadellidae: Typhlocybinae)." Insects 11, no. 10: 684.

Journal article
Published: 03 August 2020 in European Journal of Taxonomy
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The leafhopper tribe Platyjassini, endemic to Madagascar, is revised, largely based on specimens obtained in a recent bioinventory project led by the California Academy of Sciences. Platyjassini was previously known based on the type genus, Platyjassus Evans, 1953, and four described species. Betsileonas marmorata (Blanchard, 1840), the largest leafhopper recorded from Madagascar, presently known from a few specimens collected > 100 years ago and recently considered a genus and species incertae sedis within Cicadellidae, is newly placed in Platyjassini. Fourteen new genera and 54 new species are described and illustrated, and three new combinations are proposed. Pachyjassus gen. nov. includes three new species: Pachyjassus alatus sp. nov., Pachyjassus basifurcatus sp. nov. and Pachyjassus ranomafanensis sp. nov. Pallijassus gen. nov. is erected to include two species previously placed in Platyjassus, Pallijassus reticulatus (Evans, 1959) comb. nov. and Pallijassus stenospatulatus (Evans, 1959) comb. nov. Petalojassus gen. nov. includes one new species, Petalojassus ochrescens sp. nov. Phaiojassus gen. nov. includes seven new species: Phaiojassus acutus sp. nov., Phaiojassus bispinosus sp. nov., Phaiojassus constrictus sp. nov., Phaiojassus grandis sp. nov., Phaiojassus spatulatus sp. nov., Phaiojassus undulatus sp. nov. and Phaiojassus unispinosus sp. nov. Pictojassus gen. nov. includes three new species: Pictojassus kirindiensis sp. nov., Pictojassus productus sp. nov. and Pictojassus tulearensis sp. nov. Platyjassella gen. nov. includes six new species: Platyjassella ancora sp. nov., Platyjassella andohahelensis sp. nov., Platyjassella attenuata sp. nov., Platyjassella cormorana sp. nov., Platyjassella emarginata sp. nov. and Platyjassella immaculata sp. nov. Platyjassula gen. nov. includes four new species: Platyjassula cyclura sp. nov., Platyjassula heterofurca sp. nov., Platyjassula isofurca sp. nov. and Platyjassula mahajangensis sp. nov. In addition to the type species, Platyjassus viridis Evans, 1953, Platyjassus includes 11 new species: Platyjassus acutus sp. nov., Platyjassus asymmetricus sp. nov., Platyjassus fisheri sp. nov., Platyjassus griswoldi sp. nov., Platyjassus harinhalai sp. nov., Platyjassus irwini sp. nov., Platyjassus pedistylus sp. nov., Platyjassus pennyi sp. nov., Platyjassus pictipennis sp. nov., Platyjassus symmetricus sp. nov. and Platyjassus vestigius sp. nov. Plerujassus gen. nov. includes one new species, Plerujassus brunnescens sp. nov., in addition to Plerujassus appendiculatus (Evans, 1959) comb. nov., previously placed in Platyjassus. Plexijassus gen. nov. includes one new species, Plexijassus caliginosus sp. nov. Pseudocurtara gen. nov. includes three new species: Pseudocurtara minima sp. nov., Pseudocurtara nigripicta sp. nov. and Pseudocurtara quadrata sp. nov. Pseudocyrta gen. nov. includes one new species, Pseudocyrta hyalina sp. nov. Pseudomarganana gen. nov. includes two new species: Pseudomarganana olivacea sp. nov. and Pseudomarganana rosea sp. nov. Pulchrijassus gen. nov. includes eight new species: Pulchrijassus anjozorobensis sp. nov., Pulchrijassus eunsunae sp. nov., Pulchrijassus pallescens sp. nov., Pulchrijassus roseus sp. nov., Pulchrijassus rubrilineatus sp. nov., Pulchrijassus sindhuae sp. nov., Pulchrijassus talatakelyensis sp. nov. and Pulchrijassus toamasinensis sp. nov. Punctijassus gen. nov. includes three new species: Punctijassus circularis sp. nov., Punctijassus compressus sp. nov. and Punctijassus ivohibensis sp. nov. Illustrated keys to genera and species are provided.

ACS Style

Christopher H. Dietrich; Raysa Brito De Magalhães; Daniela M. Takiya. Revision of the endemic Malagasy leafhopper tribe Platyjassini (Hemiptera: Cicadellidae: Iassinae). European Journal of Taxonomy 2020, 1 .

AMA Style

Christopher H. Dietrich, Raysa Brito De Magalhães, Daniela M. Takiya. Revision of the endemic Malagasy leafhopper tribe Platyjassini (Hemiptera: Cicadellidae: Iassinae). European Journal of Taxonomy. 2020; (695):1.

Chicago/Turabian Style

Christopher H. Dietrich; Raysa Brito De Magalhães; Daniela M. Takiya. 2020. "Revision of the endemic Malagasy leafhopper tribe Platyjassini (Hemiptera: Cicadellidae: Iassinae)." European Journal of Taxonomy , no. 695: 1.

Journal article
Published: 30 April 2020 in Palaeoentomology
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Rovnotettix brachypterus gen. et sp. nov. is described and illustrated from Eocene Rovno (Ukraine) amber and tentatively placed in subfamily Bathysmatophorinae, tribe Malmaemichungiini. The new fossil is the first cicadellid described from Rovno amber from the Volyn region and the second brachypterous leafhopper adult described from the fossil record. It does not appear to be closely related to Brevaphrodella Dietrich & Gonçalves from Eocene Baltic amber, indicating that multiple flightless cicadellid lineages, now mostly associated with dry habitats with patchy vegetation, had evolved in Europe by the Eocene.

ACS Style

Christopher H. Dietrich; Evgeny E. Perkovsky. A New Genus and Species Representing the First Leafhopper (Hemiptera: Cicadellidae) from Eocene Rovno Amber. Palaeoentomology 2020, 3, 180 -187.

AMA Style

Christopher H. Dietrich, Evgeny E. Perkovsky. A New Genus and Species Representing the First Leafhopper (Hemiptera: Cicadellidae) from Eocene Rovno Amber. Palaeoentomology. 2020; 3 (2):180-187.

Chicago/Turabian Style

Christopher H. Dietrich; Evgeny E. Perkovsky. 2020. "A New Genus and Species Representing the First Leafhopper (Hemiptera: Cicadellidae) from Eocene Rovno Amber." Palaeoentomology 3, no. 2: 180-187.

Journal article
Published: 04 November 2019 in ZooKeys
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Sakhalotettix eocenicusgen. & sp. nov., the first leafhopper reported from middle Eocene Sakhalinian amber, is described and illustrated. The fossil cicadellid resembles modern Xestocephalini and Bathysmatophorini in some respects but, because of its unique combination of traits, cannot be placed with certainty in either group, or in any other modern cicadellid subfamily. It is, therefore, considered to be incertae sedis within Cicadellidae.

ACS Style

Christopher H. Dietrich; Evgeny Perkovsky. First record of Cicadellidae (Insecta, Hemiptera, Auchenorrhyncha) from Eocene Sakhalinian amber. ZooKeys 2019, 886, 127 -134.

AMA Style

Christopher H. Dietrich, Evgeny Perkovsky. First record of Cicadellidae (Insecta, Hemiptera, Auchenorrhyncha) from Eocene Sakhalinian amber. ZooKeys. 2019; 886 ():127-134.

Chicago/Turabian Style

Christopher H. Dietrich; Evgeny Perkovsky. 2019. "First record of Cicadellidae (Insecta, Hemiptera, Auchenorrhyncha) from Eocene Sakhalinian amber." ZooKeys 886, no. : 127-134.

Journal article
Published: 01 November 2019 in Insect Systematics and Diversity
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Heteroptera is a diverse suborder of insects that includes many plant pests, human disease vectors, and nuisance pests, but also beneficial insects. Previous analyses have supported recognition of seven monophyletic infraorders. A clade comprising Leptopodomorpha, Pentatomomorpha, and Cimicomorpha is also well-accepted, but relationships among the early-diverging lineages, including the aquatic infraorders (Nepomorpha and Gerromorpha), have remained poorly resolved and controversial. Phylogenomic analyses of 2,159 gene alignments derived from Illumina sequencing of transcriptomes were employed to explore the stability of relationships among major heteropteran lineages. These analyses included maximum likelihood analyses of amino acid and nucleotide sequences, as well as multi-species coalescent analysis and quartet sampling. All analyses favored a sister position of the Nepomorpha to the remaining Heteroptera. The placement of the Nepomorpha and other ambiguously supported nodes, including some within the Pentatomomorpha were explored with quartet sampling. Results of quartet sampling revealed only a slight majority of quartets supported the placement of the Nepomorpha, and some varying alternate topologies were supported within the Pentatomomorpha. These results highlight the instability of deep nodes that divide aquatic and other early-diverging lineages within the Heteroptera, suggesting that some relationships remain difficult to resolve even with large amounts of data. In addition, despite the large amount of transcriptome data analyzed, quartet sampling revealed considerable underlying conflict for some nodes, even where bootstrap support is high, emphasizing the importance of considering multiple clade support values when analyzing phylogenomic datasets.

ACS Style

Robert S De Moya; Christiane Weirauch; Andrew D Sweet; Rachel K Skinner; Kimberly K O Walden; Daniel R Swanson; Christopher H Dietrich; Kevin P Johnson. Deep Instability in the Phylogenetic Backbone of Heteroptera is Only Partly Overcome by Transcriptome-Based Phylogenomics. Insect Systematics and Diversity 2019, 3, 1 .

AMA Style

Robert S De Moya, Christiane Weirauch, Andrew D Sweet, Rachel K Skinner, Kimberly K O Walden, Daniel R Swanson, Christopher H Dietrich, Kevin P Johnson. Deep Instability in the Phylogenetic Backbone of Heteroptera is Only Partly Overcome by Transcriptome-Based Phylogenomics. Insect Systematics and Diversity. 2019; 3 (6):1.

Chicago/Turabian Style

Robert S De Moya; Christiane Weirauch; Andrew D Sweet; Rachel K Skinner; Kimberly K O Walden; Daniel R Swanson; Christopher H Dietrich; Kevin P Johnson. 2019. "Deep Instability in the Phylogenetic Backbone of Heteroptera is Only Partly Overcome by Transcriptome-Based Phylogenomics." Insect Systematics and Diversity 3, no. 6: 1.

Journal article
Published: 21 February 2019 in Annals of the Entomological Society of America
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Christopher H Dietrich; William D Perreira. Eight Leafhoppers (Hemiptera: Cicadellidae) Newly Recorded From Hawaii, Including a New Species. Annals of the Entomological Society of America 2019, 1 .

AMA Style

Christopher H Dietrich, William D Perreira. Eight Leafhoppers (Hemiptera: Cicadellidae) Newly Recorded From Hawaii, Including a New Species. Annals of the Entomological Society of America. 2019; ():1.

Chicago/Turabian Style

Christopher H Dietrich; William D Perreira. 2019. "Eight Leafhoppers (Hemiptera: Cicadellidae) Newly Recorded From Hawaii, Including a New Species." Annals of the Entomological Society of America , no. : 1.

Review
Published: 20 February 2019 in Zootaxa
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The taxonomy of the leafhopper genus Makilingia Baker is reviewed based on comparative morphological study of types and other specimens. Twenty-six species are recognized as valid including ten new species described and illustrated herein: M. davaoensis n. sp. M. lobata n. sp., M. maculamima n. sp., M. nigramima n. sp., M. paranigra n. sp., M. siamensis n. sp., M. tenebrifrons n. sp., M. uncinata n. sp., M. viraktamathi n. sp., and M. xanthopicta n. sp. Makilingia siamensis n. sp. represents the first known occurrence of the genus outside the Philippine Archipelago and the first record for Thailand. Makilingia simillima Baker, n. stat., formerly treated as a variety of M. variabilis Baker, is elevated to full species status based on distinctive differences in the male genitalia. Lectotypes are designated for several species described by Baker. The male genitalia of these species are described and illustrated for the first time and a key to all known species is provided.

ACS Style

Christopher H. Dietrich; James N. Zahniser. Review of the leafhopper genus Makilingia Baker (Hemiptera: Cicadellidae: Mileewinae). Zootaxa 2019, 4559, 473 -500.

AMA Style

Christopher H. Dietrich, James N. Zahniser. Review of the leafhopper genus Makilingia Baker (Hemiptera: Cicadellidae: Mileewinae). Zootaxa. 2019; 4559 (3):473-500.

Chicago/Turabian Style

Christopher H. Dietrich; James N. Zahniser. 2019. "Review of the leafhopper genus Makilingia Baker (Hemiptera: Cicadellidae: Mileewinae)." Zootaxa 4559, no. 3: 473-500.

Journal article
Published: 08 January 2019 in BMC Evolutionary Biology
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Geographical isolation combined with historical climatic fluctuations have been identified as two major factors that contribute to the formation of new species. On the other hand, biotic factors such as competition and predation are also able to drive the evolution and diversification of organisms. To determine whether geographical barriers contributed to population divergence or speciation in the rare endemic cicada Subpsaltria yangi the population differentiation, genetic structure and phylogeography of the species were investigated in the Loess Plateau and adjacent areas of northwestern China by analysing mitochondrial and nuclear DNA and comparing the calling song structure of 161 male individuals. The results reveal a low level of genetic differentiation and relatively simple phylogeographic structure for this species, but two independent clades corresponding to geographically isolated populations were recognised. Genetic and geographical distances were significantly correlated among lineages. Results of divergence-time estimation are consistent with a scenario of isolation due to glacial refugia and interglacial climate oscillation in northwestern China. Significant genetic divergence was found between the population occurring in the Helan Mountains and other populations, and recent population expansion has occurred in the Helan Mountains and/or adjacent areas. This population is also significantly different in calling song structure from other populations. Geographical barriers (i.e., the deserts and semi-deserts surrounding the Helan Mountains), possibly coupled with related ecological differences, may have driven population divergence and allopatric speciation. This provides a possible example of incipient speciation in Cicadidae, improves understanding of population differentiation, acoustic signal diversification and phylogeographic relationships of this rare cicada species of conservation concern, and informs future studies on population differentiation, speciation and phylogeography of other insects with a high degree of endemism in the Helan Mountains and adjacent areas.

ACS Style

Yunxiang Liu; Christopher H. Dietrich; Cong Wei. Genetic divergence, population differentiation and phylogeography of the cicada Subpsaltria yangi based on molecular and acoustic data: an example of the early stage of speciation? BMC Evolutionary Biology 2019, 19, 1 -17.

AMA Style

Yunxiang Liu, Christopher H. Dietrich, Cong Wei. Genetic divergence, population differentiation and phylogeography of the cicada Subpsaltria yangi based on molecular and acoustic data: an example of the early stage of speciation? BMC Evolutionary Biology. 2019; 19 (1):1-17.

Chicago/Turabian Style

Yunxiang Liu; Christopher H. Dietrich; Cong Wei. 2019. "Genetic divergence, population differentiation and phylogeography of the cicada Subpsaltria yangi based on molecular and acoustic data: an example of the early stage of speciation?" BMC Evolutionary Biology 19, no. 1: 1-17.

Journal article
Published: 26 November 2018 in Proceedings of the National Academy of Sciences
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Hemipteroid insects (Paraneoptera), with over 10% of all known insect diversity, are a major component of terrestrial and aquatic ecosystems. Previous phylogenetic analyses have not consistently resolved the relationships among major hemipteroid lineages. We provide maximum likelihood-based phylogenomic analyses of a taxonomically comprehensive dataset comprising sequences of 2,395 single-copy, protein-coding genes for 193 samples of hemipteroid insects and outgroups. These analyses yield a well-supported phylogeny for hemipteroid insects. Monophyly of each of the three hemipteroid orders (Psocodea, Thysanoptera, and Hemiptera) is strongly supported, as are most relationships among suborders and families. Thysanoptera (thrips) is strongly supported as sister to Hemiptera. However, as in a recent large-scale analysis sampling all insect orders, trees from our data matrices support Psocodea (bark lice and parasitic lice) as the sister group to the holometabolous insects (those with complete metamorphosis). In contrast, four-cluster likelihood mapping of these data does not support this result. A molecular dating analysis using 23 fossil calibration points suggests hemipteroid insects began diversifying before the Carboniferous, over 365 million years ago. We also explore implications for understanding the timing of diversification, the evolution of morphological traits, and the evolution of mitochondrial genome organization. These results provide a phylogenetic framework for future studies of the group.

ACS Style

Kevin P. Johnson; Christopher H. Dietrich; Frank Friedrich; Rolf G. Beutel; Benjamin Wipfler; Ralph S. Peters; Julie M. Allen; Malte Petersen; Alexander Donath; Kimberly K. O. Walden; Alexey M. Kozlov; Lars Podsiadlowski; Christoph Mayer; Karen Meusemann; Alexandros Vasilikopoulos; Robert M. Waterhouse; Stephen L. Cameron; Christiane Weirauch; Daniel R. Swanson; Diana M. Percy; Nate B. Hardy; Irene Terry; Shanlin Liu; Xin Zhou; Bernhard Misof; Hugh M. Robertson; Kazunori Yoshizawa. Phylogenomics and the evolution of hemipteroid insects. Proceedings of the National Academy of Sciences 2018, 115, 12775 -12780.

AMA Style

Kevin P. Johnson, Christopher H. Dietrich, Frank Friedrich, Rolf G. Beutel, Benjamin Wipfler, Ralph S. Peters, Julie M. Allen, Malte Petersen, Alexander Donath, Kimberly K. O. Walden, Alexey M. Kozlov, Lars Podsiadlowski, Christoph Mayer, Karen Meusemann, Alexandros Vasilikopoulos, Robert M. Waterhouse, Stephen L. Cameron, Christiane Weirauch, Daniel R. Swanson, Diana M. Percy, Nate B. Hardy, Irene Terry, Shanlin Liu, Xin Zhou, Bernhard Misof, Hugh M. Robertson, Kazunori Yoshizawa. Phylogenomics and the evolution of hemipteroid insects. Proceedings of the National Academy of Sciences. 2018; 115 (50):12775-12780.

Chicago/Turabian Style

Kevin P. Johnson; Christopher H. Dietrich; Frank Friedrich; Rolf G. Beutel; Benjamin Wipfler; Ralph S. Peters; Julie M. Allen; Malte Petersen; Alexander Donath; Kimberly K. O. Walden; Alexey M. Kozlov; Lars Podsiadlowski; Christoph Mayer; Karen Meusemann; Alexandros Vasilikopoulos; Robert M. Waterhouse; Stephen L. Cameron; Christiane Weirauch; Daniel R. Swanson; Diana M. Percy; Nate B. Hardy; Irene Terry; Shanlin Liu; Xin Zhou; Bernhard Misof; Hugh M. Robertson; Kazunori Yoshizawa. 2018. "Phylogenomics and the evolution of hemipteroid insects." Proceedings of the National Academy of Sciences 115, no. 50: 12775-12780.

Journal article
Published: 31 October 2018 in Zootaxa
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The Oriental leafhopper genus Riseveinus Li is recorded from Thailand for the first time. Four new species, R. cervcornutus sp. nov., R. hamatus sp. nov., R. spinatus sp. nov. and R. tenuispinus sp. nov., are described and illustrated. Their diagnostic characteristics are compared with close relatives. A key to all known species of Riseveinus is provided.

ACS Style

Yang Wang; Christopher H. Dietrich; Yalin Zhang. Four new species of the leafhopper genus Riseveinus Li (Hemiptera: Cicadellidae: Evacanthinae) from China and Thailand. Zootaxa 2018, 4508, 259 -266.

AMA Style

Yang Wang, Christopher H. Dietrich, Yalin Zhang. Four new species of the leafhopper genus Riseveinus Li (Hemiptera: Cicadellidae: Evacanthinae) from China and Thailand. Zootaxa. 2018; 4508 (2):259-266.

Chicago/Turabian Style

Yang Wang; Christopher H. Dietrich; Yalin Zhang. 2018. "Four new species of the leafhopper genus Riseveinus Li (Hemiptera: Cicadellidae: Evacanthinae) from China and Thailand." Zootaxa 4508, no. 2: 259-266.