Pseudoblothrus roszkovskii ( Redikorzev, 1918 )

Zaragoza, Juan A., 2010, Arcanobisium, a remarkable new genus, representing a new subfamily with a relictual distribution from eastern Spain (Arachnida: Pseudoscorpiones: Syarinidae), Zootaxa 2491, pp. 41-60 : 52

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) .

Figures

FIGURES 26 – 32. Morphological details of Syarinidae. 26. Hadoblothrus gigas (Caporiacco, 1951), male, tip of fixed finger of left chela, antiaxial view. 27. H. gigas, male, tip of movable finger of left chela, lateral-paraxial view. 28. Pseudoblothrus roszkovskii (Redikorzev, 1918), male, gland openings area sternite VI. 29. Syarinus strandi (Ellingsen, 1901), female, apex pedipalpal lobe; 31. S. strandi, female, partial view of fingers left chelicera. 30. Syarinus obscurus (Banks, 1893), male, apex pedipalpal lobe. 32. S. strandi, female, partial view of fingers right chelicera. Scale bars (mm): 0.10 (Figs 26 – 28, 31 – 32), 0.20 (Figs 29 – 30).