This paper summarizes data on findings of the genus Tibellus Simon, 1875 in Kazakhstan and Middle Asia. Distribution maps are presented, compiled on the basis of both original and literature-derived data. Tibellus macellus Simon, 1875 is recorded from Kyrgyzstan for the first time. How to cite this paper: Bariev T.B. 2026. A synopsis of the genus Tibellus Simon, 1875 (Aranei: Philodromidae) in Kazakhstan and Middle Asia // Arthropoda Selecta. Vol.35. No.1. P.116-123. doi: 10.15298/arthsel.35.1.12
Considering the upgraded descriptive standards for monstrilloid copepods published by Grygier & Ohtsuka [1995], the type specimens of Mexican species were re-examined and redescribed. This study includes the redescription of three Mexican species of Cymbasoma Thompson, 1888, currently known as the most diverse genus of the copepod order Monstrilloida. The redescriptions were prepared following currently used standards, particularly in reference to the setal armature of the antennules and details of the cephalothorax integumental ornamentation. This revision reveals previously unnoticed characters; new comparisons of these species with recently described taxa are also provided.
Here we present the first data on crustacean remains in Holocene sediments of Lake Pechevalavato (Yamal Peninsula, Western Siberia). An investigated outcrop was formed as a result of thermal abrasion of deposits located at the second marine terrace. From this outcrop, 48 samples were collected for paleolimnological analysis; crustacean remains were found in nine samples. In total, 34 ephippia, a fragment of thoracic limb filter plate and 45 mandibles were analyzed. Based on details of morphology, 20 ephippia were classified as belonging to Daphnia pulex-type, 14 ephippia - to D. longispina-type. A filter plate was found in the upper layer together with Daphnia ephippia and presumably belongs to this genus. Based on shape and size, all found mandibles belonged to notostracan Lepidurus arcticus (Pallas, 1793). According to our data, the outcrop point became to be a part of a lake (most probably, Lake Pechevalavato or a separate lake near it) c.a. 5.5-6 kya, before this time it was a terrestrial or swampy territory. Then the lake surface and depth were reduced for some reasons unknown to us. Fauna of this lake was poorer as compared to previously described Holocene water bodies of Yamal. We have demonstrated that different types of water bodies existed in the central part of Yamal Peninsula during the Holocene. How to cite this paper: Tumskaya V.V., NeretinaA.N., Kosintsev P.A., Korona O.M., Kotov A.A. 2026. First data on crustacean remains (Crustacea: Branchiopoda) in the coastal sediments of Lake Pechevalavato (Yamal Peninsula, Russia) // Arthropoda Selecta. Vol.35. No.1. P.16-25, Suppl. Tables. doi: 10.15298/arthsel.35.1.03
New data on the spider fauna of northeastern Yakutia, Russia, are presented based on material collected from the Orulgan Mountain Range (Eveno-Bytantaysky District), an area previously lacking arachnological records. A total of 11 species from five families are reported, with annotations on their distribution and habitat preferences. Among the most notable findings, Alopecosa borea (Kulczy & nacute;ski, 1908) stat.n., a former subspecies of A. solivaga (Kulczy & nacute;ski, 1901), is elevated to species rank based on clear divergence in CO1 sequences and phylogenetic placement, despite minimal morphological differences from A. solivaga. The male of A. borea is described and illustrated for the first time, and the female is redescribed. Additionally, the taxonomic status of Pardosa groenlandica (Thorell, 1872) in northeastern Asia is discussed: specimens from Yakutia differ from Greenlandic representatives in the shape of the epigyne and lack of carapace pattern, suggesting that the Siberian population may represent a separate species. Other records include Aculepeira carbonarioides (Keyserling, 1892), Gnaphosa borea Kulczy & nacute;ski, 1908, Pardosa algens (Kulczy & nacute;ski, 1908), P. sodalis Holm, 1970, P. tesquorum (Odenwall, 1901), Rhysodromus alascensis (Keyserling, 1884), and Xysticus emertoni Keyserling, 1880, several of which are reported for the first time from the studied grid square. Pardosa lyrata is reported from northeastern Yakutia for the first time. Observations ofAraniella displicata (Hentz, 1847) and R. alascensis on naleds (river icings) provide evidence of ballooning in adults.
A novel buthid scorpion of the genus Janalychas Kova & rcaron;ik, 2019 is described from the Amrabad Tiger Reserve, Telangana, based on an integrative approach combining morphological and molecular data for South Asian representatives. Morphologically, the new species is most similar to J. farkasi (Kova & rcaron;ik, 1997) from Nepal, but can be distinguished by the presence of a single carina on the mesosomal tergites (vs. three in J. farkasi) and the presence of denticles on sternite V. It can also be readily differentiated from its Indian congeners by a unique combination of morphological traits and its characteristic yellow, patterned coloration.
