Araneibatrus callissimus ( Nomura and Wang, 1991 ) Nomura and Wang, 1991

Yin, Zi-Wei, Jiang, Ri-Xin & Steiner, Helmut, 2016, Revision of the genus Araneibatrus (Coleoptera: Staphylinidae: Pselaphinae), Zootaxa 4097 (4), pp. 475-494 : 481-485

publication ID	https://doi.org/ 10.11646/zootaxa.4097.4.2
publication LSID	lsid:zoobank.org:pub:09889BBB-66DE-46D2-A394-6A194E7AE102
DOI	https://doi.org/10.5281/zenodo.6090588
persistent identifier	https://treatment.plazi.org/id/F340E468-FF86-FFFC-5783-831DFD10FDD2
treatment provided by	Plazi
scientific name	Araneibatrus callissimus ( Nomura and Wang, 1991 )
status	comb. nov.

Treatment

Araneibatrus callissimus ( Nomura and Wang, 1991) View in CoL , new combination

( Figs 1 View FIGURE 1 A, 4A, 5A, 6A, 8A, 9A, 10A–C, 12)

Batrisodellus callissimus Nomura & Wang, 1991: 77 View in CoL .

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 View FIGURE 1 A) length 2.0– 2.1 mm. Vertex ( Fig. 4 View FIGURE 4 A) with short mediobasal carina, lateral postantennal carinae present; clypeus short, less than one-third of total head length. Pronotum ( Fig. 4 View FIGURE 4 A) with median longitudinal and transverse antebasal sulci; lacking dorsal carinae and discal and antebasal spines. Elytra ( Fig. 5 View FIGURE 5 A) lacking discal striae; anterolateral margins emarginate. Metaventrite ( Fig. 6 View FIGURE 6 A) with wide notch at middle of posterior margin. Tergite IV ( Fig. 8 View FIGURE 8 A) lacking mediobasal foveae, with four basolateral foveae. Sternite IV ( Fig. 9 View FIGURE 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 View FIGURE 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 View FIGURE 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 View FIGURE 4 A), and to A. cellulanus also by the transverse aedeagal basal capsule ( Fig. 10 View FIGURE 10 A–C). It can be readily separated from both species by the more elongate pronotum and elytra ( Figs 1 View FIGURE 1 A, 4A), strongly modified male antennal clubs ( Fig 1 View FIGURE 1 A; Nomura & Wang 1991: fig. 3A–B), and abdominal tergite IV with only four basolateral foveae ( Fig. 8 View FIGURE 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 View FIGURE 12 ).