The redbay ambrosia beetle, Xyleborus glabratus Eichhoff, is native to Southeast Asia, where it specializes on Lauraceae trees. It forms a symbiosis with the ambrosia fungus Raffaelea lauricola T.C. Harr., Fraedrich & Aghayeva, which can act as a pathogen in living host trees. The beetle and fungus were recently introduced into the United States, where they have killed millions of native Lauraceae trees and threaten the avocado industry. These introduced populations have limited genetic variation. In the native range, the fungi are genetically variable, but the native genetic variability of the beetles is unknown. It is important to assess the beetle's native genetic variation because different lineages may vary in the capacity to vector this fungus, which may affect disease etiology. Here, we analyzed genetic variation in several Chinese, Taiwanese, and Vietnamese populations of X. glabratus using mitochondrial (COI) and nuclear DNA (CAD) markers. Phylogenetic analysis revealed nine COI haplotypes and four CAD genotypes. Uncorrected 'p' distance for intrapopulation comparisons ranged from 0 to 0.1 and 0 to 0.013 and interpopulation comparisons ranged from 0.137 to 0.168 and 0.015 to 0.032 for COI and CAD, respectively. Two populations exceeded the range of intraspecific nucleotide differences for both genes. Given that individuals from these populations also exhibited consistent morphological differences, they are described as two new species: Xyleborus insidiosus Cognato & Smith, n. sp. and Xyleborus mysticulus Cognato & Smith, n. sp. Xyleborus glabratus was redescribed and a lectotype was designated to facilitate its recognition in light of these new species. These results indicate that X. glabratus is genetically variable and is related to two morphologically similar species. Whether these new species and X. glabratus lineages associate with different fungal strains is unknown. Given that the biology and host colonization of these new species are unknown, preventing their introduction to other regions is prudent.

Cryphalini Lindemann, 1877 are a speciose group of mostly miniscule beetles. The tribe Cryphalini is reviewed here which resulted in taxonomic and nomenclatural changes. This revision follows a recent molecular phylogenomic re-analysis focused on the tribe and related scolytine taxa. The analysis demonstrated that the tribe is polyphyletic, as found in other molecular phylogenies. To ensure monophyletic classification, we present a revision of the former tribe with two tribes resurrected, one described, and several genera transferred to other existing tribes. Additionally, extensive generic synonymy, and new combinations are presented. A key, photographs, and illustrations are provided to enable an accurate determination of genera. The revised Cryphalini contains only CryphalusErichson, 1836 (=Hypocryphalus Hopkins, 1915 syn. nov.; Margadillius Hopkins, 1915 syn. nov.). Coriacephilini Johnson trib. nov. contains only Coriacephilus Schedl, 1939. Ernoporini Nüsslin, 1911 stat. res. contains EidophelusEichhoff, 1876 (=Scolytogenes Eichhoff, 1878 syn. nov.; PtilopodiusHopkins, 1915,syn. nov.; ErnoporicusBerger, 1917,syn. nov.; CryphalogenesWood, 1980,syn. nov.); ErnoporusThomson, 1859 (=ErnocladiusWood, 1980,syn. nov.; AllothenemusBright and Torres, 2006,syn. nov.); Hemicryphalus Schedl, 1963; and ProcryphalusHopkins, 1915. Trypophloeini Nüsslin, 1911 stat. res. includes the genera Afrocosmoderes Johnson and Jordal gen. nov.; AtomothenemusBright, 2019; Cosmoderes Eichhoff, 1878 (=AllernoporusKurentsov, 1941,syn. nov.); HypothenemusWestwood, 1834 (=PeriocryphalusWood, 1971,syn. nov.); MacrocryphalusNobuchi, 1981,stat. res.; Microcosmoderes Johnson and Jordal gen. nov.; MicrosomusBright, 2019; PygmaeoborusBright, 2019; and TrypophloeusFairmaire, 1864. Xyloterini LeConte, 1876 is maintained, containing Indocryphalus Eggers, 1939; TrypodendronStephens, 1830 and XyloterinusSwaine, 1918. AcorthylusBrèthes, 1922, CryptocarenusEggers, 1937, Neocryphus Nunberg, 1956, Stegomerus Wood, 1967, and TrypolepisBright, 2019 are transferred to Corthylini LeConte, 1876. Stephanopodius Schedl, 1963 is transferred to Xyloctonini Eichhoff, 1878. As a consequence of generic synonymy, the following new or resurrected combinations are proposed: Cosmoderes euonymi (Kurentsov, 1941) comb. nov.; Cryphalus aciculatus (Schedl, 1939) comb. nov.; Cryphalus afiamalus (Schedl, 1951) comb. nov.; Cryphalus angustior Eggers, 1927 comb. res.; Cryphalus asper (Broun, 1881) comb. nov.; Cryphalus bakeri (Eggers, 1927) comb. nov.; Cryphalus basihirtusBeeson, 1929,comb. nov.; Cryphalus bidentatus (Browne, 1980) comb. nov.; Cryphalus brevior (Schedl, 1943) comb. nov.; Cryphalus carinatus (Browne, 1980) comb. nov.; Cryphalus confusus (Hopkins, 1915) comb. nov.; Cryphalus corpulentus (Schedl, 1942) comb. nov.; Cryphalus cylindripennis (Schedl, 1959) comb. nov.; Cryphalus cylindrus (Browne, 1950) comb. nov.; Cryphalus densepilosus (Schedl, 1942) comb. nov.; Cryphalus dilutus Eichhoff, 1878 comb. res.; Cryphalus discrepans (Schedl, 1965) comb. nov.; Cryphalus discretus Eichhoff, 1878 comb. res.; Cryphalus erythrinae (Hopkins, 1915) comb. nov.; Cryphalus fici (Browne, 1986) comb. nov.; Cryphalus glabratus (Schedl, 1959) comb. nov.; Cryphalus granulatus (Schedl, 1942) comb. nov.; Cryphalus imitans (Schedl, 1951) comb. nov.; Cryphalus interponens (Schedl, 1953) comb. nov.; Cryphalus kalambanganus (Schedl, 1943) comb. nov.; Cryphalus laevis (Browne, 1980) comb. nov.; Cryphalus laticollis (Browne, 1974) comb. nov.; Cryphalus longipennis (Browne, 1970) comb. nov.; Cryphalus longipilis (Browne, 1981) comb. nov.; Cryphalus magnus (Browne, 1984) comb. nov.; Cryphalus malayensis (Schedl, 1942) comb. nov.; Cryphalus mangiferaeStebbing, 1914,comb. res.; Cryphalus margadilaonis (Hopkins, 1915) comb. nov.; Cryphalus mindoroensis (Schedl, 1943) comb. nov.; Cryphalus minor (Schedl, 1943) comb. nov.; Cryphalus minutus (Hopkins, 1915) comb. nov.; Cryphalus mollis Schedl, 1955 comb. res.; Cryphalus moorei (Schedl, 1964) comb. nov.; Cryphalus nigrosetosus (Schedl, 1948) comb. nov.; Cryphalus nitidicollis (Schedl, 1975) comb. nov.; Cryphalus obscurus (Hopkins, 1915) comb. nov.; Cryphalus ovalicollis (Schedl, 1942) comb. nov.; Cryphalus papuanus (Schedl, 1973) comb. nov.; Cryphalus piliger (Schedl, 1975) comb. nov.; Cryphalus polynesiae (Schedl, 1979) comb. nov.; Cryphalus quadrituberculatus (Schedl, 1963) comb. nov.; Cryphalus reflexus (Browne, 1980) comb. nov.; Cryphalus robustus Eichhoff, 1872 comb. res.; Cryphalus rotundus (Hopkins, 1915) comb. nov.; Cryphalus sandakanensis Schedl, 1937 comb. res.; Cryphalus spathulatus (Schedl, 1938) comb. nov.; Cryphalus striatulus (Browne, 1978) comb. nov.; Cryphalus striatus (Hopkins, 1915) comb. nov.; Cryphalus sumatranus (Schedl, 1939) comb. nov.; Cryphalus triangularis (Schedl, 1975) comb. nov.; Cryphalus tutuilaensis (Schedl, 1951) comb. nov.; Eidophelus absonus (Schedl, 1975) comb. nov.; Eidophelus afer (Schedl, 1970) comb. nov.; Eidophelus africanus (Schedl, 1977) comb. nov.; Eidophelus aitutakii (Beaver and Maddison, 1990) comb. nov.; Eidophelus alniphagus (Nobuchi, 1975) comb. nov.; Eidophelus alternans (Schedl, 1975) comb. nov.; Eidophelus amanicus (Eggers, 1919) comb. nov.; Eidophelus ankius (Schedl, 1979) comb. nov.; Eidophelus apicalis (Schedl, 1971) comb. nov.; Eidophelus approximatus (Schedl, 1975) comb. nov.; Eidophelus aspericollis (Eichhoff, 1878) comb. nov.; Eidophelus ater (Eggers, 1923) comb. nov.; Eidophelus australis (Schedl, 1942) comb. nov.; Eidophelus badius (Nobuchi, 1975) comb. nov.; Eidophelus bambusae (Browne, 1983) comb. nov.; Eidophelus bangensis (Eggers, 1927) comb. nov.; Eidophelus basilaris (Wood, 1960) comb. nov.; Eidophelus birosimensis (Murayama, 1958) comb. nov.; Eidophelus braderi (Browne, 1965) comb. nov.; Eidophelus brimblecombei (Schedl, 1972) comb. nov.; Eidophelus buruensis (Eggers, 1926) comb. nov.; Eidophelus camelliae (Nobuchi, 1975) comb. nov.; Eidophelus candidus (Nobuchi, 1975) comb. nov.; Eidophelus capucinus (Schedl, 1971) comb. nov.; Eidophelus caucasicus (Lindemann, 1877) comb. nov.; Eidophelus ceylonicus (Schedl, 1959) comb. nov.; Eidophelus cicatricosus (Schedl, 1942) comb. nov.; Eidophelus coccotrypanoides (Schedl, 1939) comb. nov.; Eidophelus communis (Schaufuss, 1891) comb. nov.; Eidophelus confragosus (Sampson, 1914) comb. nov.; Eidophelus corni (Kurentsov, 1941) comb. nov.; Eidophelus corpulentus (Schedl, 1965) comb. nov.; Eidophelus corrugatus (Schedl, 1950) comb. nov.; Eidophelus creber (Schedl, 1975) comb. nov.; Eidophelus crenatus (Sampson, 1914) comb. nov.; Eidophelus cylindricus (Schedl, 1959) comb. nov.; Eidophelus darwini (Eichhoff, 1878) comb. nov.; Eidophelus devius (Schedl, 1975) comb. nov.; Eidophelus dubiosus (Wood, 1960) comb. nov.; Eidophelus eggersi (Schedl, 1962) comb. nov.; Eidophelus euphorbiae (Wood, 1980) comb. nov.; Eidophelus excellens (Schedl, 1979) comb. nov.; Eidophelus exiguus (Wood, 1980) comb. nov.; Eidophelus exilis (Yin, 2001) comb. nov.; Eidophelus eximius (Schedl, 1942) comb. nov.; Eidophelus expers (Blandford, 1894) comb. nov.; Eidophelus fagi (Fabricius, 1798) comb. nov.; Eidophelus fijianus (Schedl, 1950) comb. nov.; Eidophelus formosanus (Browne, 1981) comb. nov.; Eidophelus fugax (Schedl, 1975) comb. nov.; Eidophelus fujisanus (Nobuchi, 1975) comb. nov.; Eidophelus fulgens (Schedl, 1975) comb. nov.; Eidophelus fulgidus (Schedl, 1975) comb. nov.; Eidophelus fulvipennis (Nobuchi, 1975) comb. nov.; Eidophelus ghanaensis (Schedl, 1977) comb. nov.; Eidophelus glabratus (Yin, 2001) comb. nov.; Eidophelus gracilis (Schedl, 1950) comb. nov.; Eidophelus granulatus (Wood, 1960) comb. nov.; Eidophelus grobleri (Schedl, 1962) comb. nov.; Eidophelus hirtus (Wood, 1974) comb. nov.; Eidophelus hobohmi (Schedl, 1955) comb. nov.; Eidophelus hylesinopsis (Schedl, 1975) comb. nov.; Eidophelus incultus (Yin, 2001) comb. nov.; Eidophelus indicus (Wood, 1989) comb. nov.; Eidophelus insularis (Nobuchi, 1975) comb. nov.; Eidophelus insularum (Krivolutskaya, 1968) comb. nov.; Eidophelus jalappae (Letzner, 1849) comb. nov.; Eidophelus javanus (Schedl, 1942) comb. nov.; Eidophelus kanawhae (Hopkins, 1915) comb. nov.; Eidophelus landolphiae (Schedl, 1961) comb. nov.; Eidophelus leprosulus (Browne, 1974) comb. nov.; Eidophelus longipennis (Eggers, 1936) comb. nov.; Eidophelus magnocularis (Yin, 2001) comb. nov.; Eidophelus marquesanus (Beeson, 1935) comb. nov.; Eidophelus mauritianus (Schedl, 1965) comb. nov.; Eidophelus micans (Eggers, 1927) comb. nov.; Eidophelus minor (Eggers, 1927) comb. nov.; Eidophelus minutissimus (Schedl, 1943) comb. nov.; Eidophelus mus (Schedl, 1975) comb. nov.; Eidophelus nanulus (Wood, 1960) comb. nov.; Eidophelus nigellatus (Schedl, 1950) comb. nov.; Eidophelus nubilus (Wood, 1960) comb. nov.; Eidophelus ocularis (Schedl, 1965) comb. nov.; Eidophelus onyanganus (Schedl, 1941) comb. nov.; Eidophelus opacus (Schedl, 1959) comb. nov.; Eidophelus pacificus (Schedl, 1941) comb. nov.; Eidophelus papuanus (Schedl, 1974) comb. nov.; Eidophelus papuensis (Wood, 1989) comb. nov.; Eidophelus paradoxus (Wood, 1992) comb. nov.; Eidophelus parvus (Hopkins, 1915) comb. nov.; Eidophelus pityophthorinus (Schedl, 1943) comb. nov.; Eidophelus pleiocarpae (Schedl, 1957) comb. nov.; Eidophelus polisquamosus (Yin, 2001) comb. nov.; Eidophelus praeda (Browne, 1978) comb. nov.; Eidophelus puerarae (Choo and Woo, 1989) comb. nov.; Eidophelus pumilionides (Schedl, 1977) comb. nov.; Eidophelus pumilus (Wood, 1960) comb. nov.; Eidophelus punctatulus (Nobuchi, 1976) comb. nov.; Eidophelus punctatus (Schedl, 1951) comb. nov.; Eidophelus puncticollis (Schedl, 1950) comb. nov.; Eidophelus pygmaeolus (Schedl, 1971) comb. nov.; Eidophelus quadridens (Browne, 1983) comb. nov.; Eidophelus ramosus (Beeson, 1935) comb. nov.; Eidophelus robustus (Schedl, 1955) comb. nov.; Eidophelus rugosus (Schedl, 1943) comb. nov.; Eidophelus rusticus (Wood, 1974) comb. nov.; Eidophelus semenovi (Kurentsov, 1941) comb. nov.; Eidophelus separandus (Schedl, 1965) comb. nov.; Eidophelus setifer (Wood, 1974) comb. nov.; Eidophelus sodalis (Schedl, 1965) comb. nov.; Eidophelus spessivtzevi (Berger, 1917) comb. nov.; Eidophelus spirostachius (Schedl, 1958) comb. nov.; Eidophelus splendens (Schedl, 1975) comb. nov.; Eidophelus squamatilis (Schedl, 1977) comb. nov.; Eidophelus squamosus (Schedl, 1942) comb. nov.; Eidophelus squamulosus (Eggers, 1936) comb. nov.; Eidophelus stephegynis (Hopkins, 1915) comb. nov.; Eidophelus takahashii (Nobuchi, 1975) comb. nov.; Eidophelus tarawai (Beaver, 1990) comb. nov.; Eidophelus tonsus (Schedl, 1969) comb. nov.; Eidophelus tricolor (Lea, 1910) comb. nov.; Eidophelus trucis (Wood, 1974) comb. nov.; Eidophelus uncatus (Schedl, 1971) comb. nov.; Eidophelus usagaricus (Eggers, 1922) comb. nov.; Eidophelus varius (Schedl, 1975) comb. nov.; Eidophelus venustus (Schedl, 1953) comb. nov.; Eidophelus yunnanensis (Yin, 2001) comb. nov.; Eidophelus zachvatkini (Krivolutskaya, 1958) comb. nov.; Ernoporus corpulentus (Sampson, 1919) comb. nov.; Ernoporus exquisitus (Bright, 2019) comb. nov.; Ernoporus guiboutiae (Schedl, 1957) comb. nov.; Ernoporus minutus (Bright and Torres, 2006) comb. nov.; Hypothenemus attenuatus (Eggers, 1935) comb. nov.; Hypothenemus loranthus (Schedl, 1942) comb. nov.; Hypothenemus novateutonicus (Schedl, 1951) comb. nov.; Hypothenemus pullus (Wood, 1971) comb. nov. Following assessment of diagnostic characters, the following species were transferred to a different genus: Afrocosmoderes madagascariensis Schedl, 1961 comb. nov.; Afrocosmoderes caplandicus (Schedl, 1965) comb. nov.; Afrocosmoderes grobleri (Schedl, 1961) comb. nov.; Afrocosmoderes niger (Schedl, 1961) comb. nov.; Afrocosmoderes pellitus (Schedl, 1953) comb. nov.; Afrocosmoderes pennatus (Schedl, 1953) comb. nov.; Eidophelus concentralis (Schedl, 1975) comb. nov.; Eidophelus inermis (Browne, 1984) comb. nov.; Eidophelus insignis (Browne, 1984) comb. nov.; Eidophelus kinabaluensis (Bright, 1992) comb. nov.; Eidophelus philippinensis (Schedl, 1967) comb. nov.; Eidophelus podocarpi (Bright, 1992) comb. nov.; Ernoporus imitatrix (Schedl, 1977) comb. nov.; Ernoporus minor (Schedl, 1942) comb. nov.; Ernoporus parvulus (Eggers, 1943) comb. nov.; Indocryphalus sericeus (Schedl, 1942) comb. nov.; Macrocryphalus elongatus (Schedl, 1965) comb. nov.; Macrocryphalus punctipennis (Schedl, 1965) comb. nov.; Microcosmoderes shoreae (Schedl, 1953) comb. nov.; Stegomerus parvatis (Wood, 1974) comb. nov.; Stephanopodius dubiosus (Schedl, 1970) comb. nov. Twenty-nine secondary homonyms were created following genus synonymy, and are designated replacement names: Afrocosmoderes schedli Johnson nom. nov. (=Euptilius madagascariensis Schedl, 1963 syn. nov.); Cryphalus amplicollis Johnson nom. nov. (=Cryphalus laticollis Browne, 1984 syn. nov.); Cryphalus eggersi Johnson nom. nov. (=Cryphalus confusus Eggers, 1927 syn. nov.); Cryphalus fuscus Johnson nom. nov. (=Cryphalus cylindrus Browne, 1984 syn. nov.); Cryphalus gracilis Johnson nom. nov. (=Cryphalus laevis Browne, 1984 syn. nov.); Cryphalus luteus Johnson nom. nov. (=Margadillius fulvus Browne, 1984 syn. nov.); Cryphalus minusculus Johnson nom. nov. (=Hypocryphalus minutus Browne, 1980 syn. nov.); Cryphalus ozopemoides Johnson nom. nov. (=Hypocryphalus montanusSchedl, 1974,syn. nov.); Cryphalus pellicius Johnson nom....