Bisetocreagris
Creators: name: Volker Mahnert
name: Yun-chun Li
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Pseudoscorpiones
Neobisiidae
Bisetocreagris

description: Bisetocreagris sp.
Material examined: 1♀ (in MSWU), 1♂ (in MHNG); China, Henan Province, Nei Xiang, Ban Chang Town, Tian Xian Cave, alt. 683 m, 33º26.732’N 111º38.795’E; 24 May 2014; coll. Yun-chun Li and Yu-Cheng Lin.
Description (based mainly on ♀): Carapace nearly as long as broad, smooth, with anterior margin slightly protruding medially, 4 big eyes with distinct lenses present, anterior ones about their diameter away from anterior carapace margin, chaetotaxy: 6/4/6/7-8; tergites mostly with 11-13 marginal setae. Manducatory process with 3-4 setae, pedipalpal coxa 8, coxa I 8-9, II 6, III 4-5, IV 10; genital operculum with 10 (5/5) medial marginal and discal setae; sternite III with anteromedian groove; III and IV with 6 and 4-5 suprastigmal setae, respectively, the following sternites with 18-20 marginal setae, on VI-X 2 submedial setae placed submarginally. Pleural membrane granular.
Chelicera: 7 setae on hand, fixed finger with 10 triangular teeth, movable finger with 14 teeth without thickened lamella; galea: a short broad stump on left chelicera (clearly broken), on right chelicera a transparent broad hump; serrula exterior with 36 blades. Rallum with 8 pinnate setae, the distal one with an expanded base.
Pedipalp: Femur and club of patella on medial face finely granular (in part indistinctly), hand on medial face indistinctly granular; trochanter with a small ventral hump, 2.2 times, femur 4.4 (♂ 4.2) times, patella 3.0 (♂ 2.8) times, club distinctly (2.51/ ♂ 2.25 times) longer than pedicel, hand with pedicel 1.8 (♂ 2.0) times, chela with pedicel 3.6 (♂ 4.5) times, without pedicel 3.45 times longer than broad; finger 1.08 (♂ 1.27) times longer than hand with pedicel. Fixed finger with 74 teeth (cusped in distal third of tooth row), movable finger with 78 teeth (only the distal 18 cusped). Trichobothria (8+4): on fixed finger it indistinctly proximal et, est in middle of finger slightly nearer to et than to ist; five trichobothria at finger base and on hand; movable finger: st distinctly nearer to t than to sb, sb nearer to b than to st.
Measurements of pedipalp of ♀ (♂ in parentheses): Femur 1.10/0.25 (1.01/0.24), patella 0.93/0.36 (0.85/0.31), length of pedicel 0.27 (0.26), hand with pedicel 0.95/0.54 (0.81/0.40), length of pedicel 0.13 (0.09), length of finger 1.03 (1.03), of chela with pedicel 1.96 (1.83).
Remarks: This seems to be an edaphic species occasionally occurring in caves. It is similar to Bisetocreagris orientalis (Chamberlin), as defined by Harvey (1999), but differs by the somewhat more slender pedipalpal segments. Variability of those characters being unknown and knowledge of the neobisiid genera and species (particularly of Bisetocreagris) from this region being fragmentary, we refrain from attributing these specimens to a described species.
description: Published as part of Volker Mahnert & Yun-chun Li, 2016, Cave-inhabiting Neobisiidae (Arachnida: Pseudoscorpiones) from China, with description of four new species of Bisetocreagris Ćurčić, pp. 259-268 in Revue suisse de Zoologie 123 on page 267, DOI: 10.5281/zenodo.155299