Quedionuchus yunnanensis, Brunke, 2020

Brunke, A. J., Salnitska, M., Hansen, A. K., Zmudzinska, A., Smetana, A., Buffam, J. & Solodovnikov, A., 2020, Are subcortical rove beetles truly Holarctic? An integrative taxonomic revision of north temperate Quedionuchus (Coleoptera: Staphylinidae: Staphylininae), Organisms Diversity & Evolution (New York, N. Y.) 20 (1), pp. 77-116 : 92

Comments. Quedionuchus yunnanensis is the southernmost occurring species of the genus in the Old World.

Samuraicus group

This group of entirely dark, non-colour polymorphic species is distinguished by the transverse, non-whorled microsculpture in-between the dorsal rows of the pronotum, pronotum but not head iridescent in clean specimens, short, spoon-shaped paramere (e.g., Fig. 5d ) and the pair of sclerotized markings at the base of the central lobe on female tergite X ( Fig. 7a ). Currently there are three allopatric species, one each in the West Caucasus, mainland eastern Palaearctic, and Japan. Although members of this group are distinguished from those of the Glaber group most easily by the pronotal microsculpture, they do not cooccur with entirely dark morphs of the Glaber group (known for West Palaearctic populations of Q. glaber and Nearctic Q. longipennis ) as far as known. Unlike other species of Quedionuchus , the shape of the median lobe in lateral view was not found to be diagnostic of species.

Figures

Fig. 5 Quedionuchus samuraicus (Bernhauer and Schubert) (a–d), Q. deceptor Brunke (e–h), Q. caucasicus Brunke (i–i), Q. reitterianus (Bernhauer) (m, o, p), and Q. yunnanensis Brunke (N). Aedeagus in

Fig. 7 Female tergite X of: Quedionuchus samuraicus (Bernhauer and Schubert) (a); Q. reitterianus (Bernhauer) (b); Q. longipennis (Mannerheim) (c); Q. plagiatus (Mannerheim) (d); Q. gilaensis Brunke (E); Q. armipes Sharp (F). Scale bars = 0.5 mm