Chlaenius (Agostenus), Fischer von Waldheim, 1829

Sundukov, Yurii N. & Makarov, Kirill V., 2022, Notes on the systematics and nomenclature of some taxa of the genus Chlaenius Bonelli, 1810 (Coleoptera, Carabidae) from the Far East, Zootaxa 5222 (2), pp. 190-200 : 198

Key to the Far Eastern species of the subgenus Agostenus Fischer von Waldheim, 1829 , genus Chlaenius Bonelli, 1810

1. Even intervals of elytra more densely punctured, with denser yellow pubescence; odd intervals with less dense black hairs; suture elevated and shining ( Figs 16–18 ). Unicolour black with slight bronze tint. Length 14–18 mm ................... …............................................................................. Chlaenius quadrisulcatus

- All intervals of elytra with dense wrinkled punctures and uniform yellow or grey pubescence; elytral suture neither elevated nor shining ( Figs 13–15 ).................................................................................. 2

2. Prosternal process not bordered and punctured. Larger (length 13–15 mm) and wider. Head without green sheen ( Figs 14–15 ) Chlaenius sulcicollis

- Prosternal process distinctly bordered and smooth. Smaller (length 12–13 mm) and narrower. Head often with green or copper sheen ( Figs 13 )...................................................................... Chlaenius alutaceus

Figures

FIGURES 13–18. Far Eastern species of the subgenus Agostenus Fischer von Waldheim, 1829, dorsal view. 13, Chlaenius alutaceus Gеbler, 1830 (Lake Khanka, Primorsky Territory, Russia); 14–15, Chlaenius sulcicollis (Paykul, 1798) (14, Belarus; 15, Golubiny Utes, Primorsky Territory, Russia); 16–18, Chlaenius quadrisulcatus (Paykul, 1790) (16, Kedrovaya Pad’ Reserve, Primorsky Territory, Russia; 17, Blagoveshchensk Distr., Amurskaya Oblast, Russia; 18, Kunashir Island, Kuril Islands, Russia).