The study is based on new material from the collections of the Naturalis Biodiversity Centre in Leiden (RNHM) and the Hungarian Natural History Museum (HNHM) and addresses issues in two genera: Epeus Peckham & Peckham, 1886 and Ptocasius Simon, 1885 from Thailand. Both genera are of Asian/Indomalayan origin, the latter with a diversity hotspot in the subtropical valleys of the Himalayas. Based on morphological data, we propose three new species of Epeus (Epeus daiqini sp. nov. (♂♀), Epeus pallidus sp. nov. (♀), Epeus szirakii sp. nov. (♀)) and two new species of Ptacasius (Ptocasius metzneri sp. nov. (♂♀) and Ptocasius sakaerat sp. nov. (♀)). Additionally, we redescribed E. tener (Simon, 1877) and added photographs of morphological characters. The genus Ptocasius is redefined due to the inclusion of 37 species, previously included in Yaginumaella Prószyński, 1979. Relationships and distribution of both genera are discussed in reference to molecular, morphological and distributional data, published by other authors in recent years.

The jumping spider genus Cytaea is an iconic member of the Australo-Pacific region. The genus as recognized today is reportedly not monophyletic, most of the forty-two species described here in the 19th century lacking modern diagnoses and adequate illustrations. The genus clearly needs a throughout revision. To avoid future synonyms, species redescriptions based on integrative taxonomy are necessary. Several species of the genus Cytaea are studied here in terms of species taxonomy. Cytaea alburna Keyserling 1882, the type species, is re-described. We propose Cytaea severa (Thorell, 1881) and Cytaea barbatissima (Keyserling, 1881) are as junior synonyms of the new combination for Ascyltus asper (Karsch, 1878), Cytaea asper (Karsch, 1878) comb nov. as we find to belong to the genus as well. The integrative approach was used based on diagnostic morphological characters (presented as images and drawings), DNA barcodes and a barcode gap analysis which tested the species distinctness. Genitalic structures are redefined and discussed in terms of function. The conclusion for the 4 species were based on 22 specimens, 14 DNA barcodes, publication supplemented with 46 digital micrographs and 7 drawings.http://LSIDurn:lsid:zoobank.org:pub:001FB3A0-074E-4290-B2D8-AD246D629E93

The species of Trite Simon, 1885 (Araneae: Salticidae) from New Caledonia

A species known from earlier behavioural studies as “Holoplatys sp.”, is described asTrite pollardisp. nov. Within the genusTrite, two species groups are distinguished: theplaniceps-group (found in New Caledonia, New Zealand, Lord Howe Island and Norfolk Island) and theincognita-group (limited to New Zealand). The three alternative scenarios of theTriteorigin, relationships and radiation in New Zealand, New Caledonia and Lord Howe Island are discussed. Three species are considered to be excluded fromTrite.

Five new species of Helpis Simon, 1901 from Queensland and New South Wales are diagnosed, described and illustrated: H. foelixi sp. nov. (♂); H. merriwa sp. nov. (♀); H. staregai sp. nov. (♀); H. wanlessi sp. nov. (♀) and H. wisharti sp. nov. (♀). The male of H. kenilworthi Żabka, 2002 is described for the first time, Helpis gracilis Gardzińska, 1996 is illustrated to show intraspecific variation and Astia colemani Wanless, 1988 is redescribed and transferred to the genus Helpis. Remarks on relationships of described species are provided and maps with distributional records are given.

The monotypic jumping spider genus Lystrocteisa Simon, 1884 is redescribed. A new generic diagnosis is provided, based on both sexes, together with redescriptions of the male and description and illustration of the hitherto unknown female of the type species.