Araneibatrus callissimus Nomura and Wang 1991, new combination
Creators: name: Yin, Zi-Wei
name: Jiang, Ri-Xin
name: Steiner, Helmut
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Araneibatrus
Araneibatrus callissimus

description: Araneibatrus callissimus (Nomura and Wang, 1991), new combination
(Figs 1 A, 4A, 5A, 6A, 8A, 9A, 10A–C, 12)
Batrisodellus callissimus Nomura & Wang, 1991: 77.
Tribasodellus callissimus; Yin, Nomura & Zhao 2011: 37.
Type material studied. 4 Paratypes. 2 males, 1 female: ‘Liangyan Cave, Caoyangxiang, Guilin, CHINA / 11.ii.1991 ’ (SNUC); 1 female: ‘Niubiyan Cave, Yangshuo, Guilin, Guangxi, CHINA / 12.ii.1991, Y. Nishikawa leg.’ (SNUC).
Revised diagnosis. Body (Fig. 1 A) length 2.0– 2.1 mm. Vertex (Fig. 4 A) with short mediobasal carina, lateral postantennal carinae present; clypeus short, less than one-third of total head length. Pronotum (Fig. 4 A) with median longitudinal and transverse antebasal sulci; lacking dorsal carinae and discal and antebasal spines. Elytra (Fig. 5 A) lacking discal striae; anterolateral margins emarginate. Metaventrite (Fig. 6 A) with wide notch at middle of posterior margin. Tergite IV (Fig. 8 A) lacking mediobasal foveae, with four basolateral foveae. Sternite IV (Fig. 9 A) with two mediobasal and six basolateral foveae. Male with antennal club and metaventrite modified, protarsomere II with small apical denticle, mesotibia with triangular apical spine, metatrochanter with curved ventral tooth, and aedeagus (Fig. 10 A–C) with a transverse basal capsule.
Description. See Nomura & Wang 1991: 77–82. Measurements: male BL 2.08–2.10 mm, HL 0.44–0.45 mm, HW 0.41–0.43 mm, PL 0.48 mm, PW 0.38 mm, EL 0.65–0.66 mm, EW 0.60–0.61 mm, AL 0.48–0.50 mm, AW 0.55–0.57 mm, length of aedeagus 0.26 mm; female BL 2.02–2.03 mm, HL 0.43–0.44 mm, HW 0.40–0.41 mm, PL 0.46–0.47 mm, PW 0.38–0.40 mm, EL 0.61–0.65 mm, EW 0.58–0.61 mm, AL 0.48–0.51 mm, AW 0.53–0.60 mm.
Character not mentioned in the original description: male metaventrite with two small submedian tubercles (Fig. 6 A, indicated by arrow).
Comparative notes. Araneibatrus callissimus is similar to A. cellulanus and A. grossepunctatus (both described below) by sharing the lateral postantennal carinae on the vertex (Fig. 4 A), and to A. cellulanus also by the transverse aedeagal basal capsule (Fig. 10 A–C). It can be readily separated from both species by the more elongate pronotum and elytra (Figs 1 A, 4A), strongly modified male antennal clubs (Fig 1 A; Nomura & Wang 1991: fig. 3A–B), and abdominal tergite IV with only four basolateral foveae (Fig. 8 A). Both A. cellulanus and A. grossepunctatus have a stouter pronotum and elytra, their antennal clubs in the male are not modified, and there are six basolateral foveae on tergite IV.
Collecting environment. Individuals were often collected from undersides of stones and beneath straw in several limestone caves (Nomura & Wang 1991: 82).
Distribution. Southern China: Guangxi (Fig. 12).
description: Published as part of Yin, Zi-Wei, Jiang, Ri-Xin & Steiner, Helmut, 2016, Revision of the genus Araneibatrus (Coleoptera: Staphylinidae: Pselaphinae), pp. 475-494 in Zootaxa 4097 (4) on pages 481-485, DOI: 10.11646/zootaxa.4097.4.2, http://zenodo.org/record/255048