Neolucanus fuscus, Didier, 1926

Key to identification of telodont males of the Neolucanus fuscus View in CoL group ( Fujita 2010; Toshiyuki 2021; Yi 2023 and present paper)

1 Mandible almost horizontal with approximate right-angle fork behind the apex in lateral view ( Fig. 3F View FIGURE 3 )......................................................................... Neolucanus horizontalis Xin, Zhong & Qi , new species

– Mandible up-curved with acute-angle fork behind the apex in lateral view ( Figs. 3B, J, N View FIGURE 3 )............................ 2

2 Base of inner margin of protibia with a noticeable gap ( Fig. 3L View FIGURE 3 )................................................. 3

– Base of inner margin of protibia direct or with a unclear gap ( Figs. 3D, H, P View FIGURE 3 )...................................... 4

3 Mandible slightly curved inward and generally straight in dorsal view ( Fig. 3I View FIGURE 3 )............. Neolucanus fuscus Didier, 1926 View in CoL

– Mandible violently curved inward, forming a circular arc in dorsal view.......................................... 5

4 Base of inner margin of protibia with a unclear gap; dorsal tooth tiny ( Fig. 3N, P View FIGURE 3 )............................................................................................... .. Neolucanus brochieri Bomans & Miyashita, 1997 View in CoL

– Base of inner margin of protibia direct; dorsal tooth relatively long ( Fig. 3B, D View FIGURE 3 ).......... Neolucanus lehmanni Baba, 1995 View in CoL

5 Mandible violently up-curved................................................. Neolucanus delicatus Didier, 1927 View in CoL

– Mandible not violently up-curved............................................. Neolucanus inaharai Okuda, 2009 View in CoL