Arcanobisium, a remarkable new genus, representing a new subfamily with a relictual distribution from eastern Spain (Arachnida: Pseudoscorpiones: Syarinidae) Author Zaragoza, Juan A. text Zootaxa 2010 2491 41 60 journal article 10.5281/zenodo.195647 5dbc17e2-43e6-4ca4-9921-56eb43a9aec3 1175-5326 195647 Pseudoblothrus roszkovskii ( Redikorzev, 1918 ) Ideoblothrus roszkovskii Redikorzev 1918 : 94 –96, figs 3, 4, 4a. Pseudoblothrus roszkovskii (Redikorzev) : Beier 1931 : 21 –22. Material examined. Ukraine , Krym (Crimea), cave Tschazyr-Dag, 25 May 1907 : 1 male and 1 female , deposited in NHMW . Supplementary description. Opisthosoma elongate, tergites-sternites X–XI of normal size and position. Pleural membrane striate. Gland openings area present on male sternite VI, framed by a near-circular sclerotized ring, internally with four tubercles that bear different number of fusules, externally surrounded by numerous small, circular, glandular (?) pores ( Fig. 28 ). One pair of glandular setae within the male genital atrium. Male sternite IV without cribrate area. Stigmata of sternite III with 4 setae and of those of sternite IV with 5 setae. Carapace 1.42× longer than broad, without epistome. Chelicera without galea, subgaleal seta 0.70×, dental row reaching distinctly basal. Apex of pedipalpal coxa triangular and long, with distal 2 setae. Fixed chelal finger without feathershaped setae. Trichobothrium t simple, only slightly shorter than other trichobothria. Venom duct short. Patella of leg IV twice as long as femur, junction between femur-patella perpendicular. Vachon (1954 , 1969 ) mentioned that in this species the tarsi were basally expanded, which he attributed to neoteny, but these expansions have not been observed in the material studied here. The same feature has also observed in last two nymphal stages in the genera Hadoblothrus and Microcreagrella ( Mahnert 1980 ) .