Agnosthaetus truncatus, Clarke, 2011

Clarke, Dave J., 2011, A Revision of the New Zealand Endemic Rove Beetle Genus Agnosthaetus Bernhauer (Coleoptera: Staphylinidae), The Coleopterists Bulletin (mo 10) 2011, pp. 1-118 : 64

Agnosthaetus truncatus species-group

This probably monophyletic species-group includes the species Agnosthaetus truncatus Clarke and Agnosthaetus sculptus Clarke , which can be distinguished from all other species of Agnosthaetus by the combination of distinct microsculpture on the head and thorax, sublongitudinal ridge of head indistinct to more or less absent (similar to Fig. 11 , cf. Fig. 10 , sr), shallow, indistinct, and sparse dorsal punctation of the head (with punctures separated by 0.5–1.0X puncture diameter; cf. the thayerae species-group, with which these two species are most similar), (one or) two lateral elytral ridges ( Fig. 24 , ek, mr), and male labral apex with two distinctly enlarged, rounded, contiguous, dorsally projecting medial teeth ( Figs. 171, 174 , which may sometimes appear as one large rounded tooth).

Figures

Figs. 10–13. Head capsules of Agnosthaetus spp. 10) A. stilbus; 11) A. rodmani; 12) A. brouni; 13) A. chiasma. Scale bars = 100 mm.

Figs. 23–24. Agnosthaetus cariniceps, thorax. 23) Dorsal view; 24) Left lateral view. Scale bars = 100 mm.

Figs. 171–176. Male (upper) and female (lower) labra, dorsal (anterior margin) view, and aedeagi, dorsal (left) and right lateral (right) views, of species in the Agnosthaetus truncatus species-group. 171–173) A. truncatus; 174–176) A. sculptus. Scale bars = 100 mm.