Batrisodes Reitter, 1882

Yin, Zi-Wei, 2022, The Batrisini of Tibet: unveiling an enigmatic ant-loving beetle diversity at Earth’s “ Third Pole ” (Coleoptera, Staphylinidae, Pselaphinae), Zootaxa 5111 (1), pp. 1-211 : 89-90

Batrisodes Reitter, 1882

Chinese common name: qà甲¤

Batrisodes Reitter, 1882: 134 ; Park 1947 (North American species), 1948 (checklist of world species); Chandler 1997 (catalog of North American species); Besuchet 1981 (Palaearctic species); Newton & Chandler 1989 (discussion of type species, catalog); Nomura 2007 (Japanese species). Type species: Batrisus delaporti Aubé, 1833: 509 (subsequent designation by Lucas, 1920: 135).

= Alytus Hampe, 1863: 285. Type species: Trichonyx adnexus Hampe, 1863: 285 (monotypy). Nomen oblatum, see discussion in Newton & Chandler 1989: 8.

= Batrisodellus Jeannel, 1958: 37. Type species: Batrisodes nipponensis Raffray, 1909: 23 (original designation). Synonymized by Yin et al. 2015a: 53.

In China, the genus is represented by 21 species (e. g., Nomura 2007; Yin & Nomura 2011; Yin et al. 2015a; Jiang & Yin 2016, 2017; Zhang & Yin 2021), with most of these described only recently. Some of the Chinese species are known inquilines of a wide range of ant genera including Aphaenogaster Mayr, Brachyponera Emery, Formica Linné, Lasius Fabricius, Myrmica Latreille, Nylanderia Emery, Odontomachus Latreille, Pheidole Westwood, and Pseudolasius Emery ( Yin & Li 2013b; Yin & Shen 2015; Jiang & Yin 2016, 2017). Batrisodes guoguotang was collected by sifting leaf litter, and there is no information on the biology of B. hanmi . The type material of Batrisodes pruinosus Reitter (a female) was collected by Russian ethnographer Grigory Potanin from Amdo (ȐƷ) ( Besuchet 1981), an area historically in a broader Tibet, but now belonging to Qinghai Province. This species is here excluded from the Tibetan fauna. The following key is provided to help with the separation of the two Tibetan species.

Key to Tibetan species of Batrisodes (male)

1 Central part of vertex finely punctate ( Fig. 38B ); metatrochanter with strongly curved ventral projection ( Fig. 38C ); dorsal lobe of aedeagus split into three lobes near apex ( Fig. 38F )....................................... B. guoguotang sp. nov.

- Central part of vertex coarsely punctate ( Fig. 39B ); metatrochanter with slightly curved ventral spine ( Fig. 38C ); dorsal lobe of aedeagus split into two lobes near apex ( Fig. 39H )............................................... B. hanmi sp. nov.

Figures

FIGURE 38. Morphology of Batrisodes guoguotang sp. nov., male. A. Dorsal habitus. B. Head and pronotum. C. Metatrochanter and metafemur. D. Metatibia. E. Sternite 7 (IX). F, G. Aedeagus, lateral (F) and ventral (G). Scale bars: 0.5 mm in A; 0.3 mm in B–D; 0.1 mm in E; 0.2 mm in F, G.

FIGURE 39. Morphology of Batrisodes hanmi sp. nov. (A–H. Male. I. Female). A. Dorsal habitus. B. Head and pronotum. C. Mesotrochanter. D. Metatrochanter. E. Metatibia. F. Sternite 7 (IX). G, H. Aedeagus, lateral (G) and ventral (H). I. Genitalia. Scale bars: 0.5 mm in A; 0.3 mm in B, E; 0.1 mm in C, D, F, I; 0.2 mm in G. H.