Lathrobium nomurai, Nakane, 1955

Sato, Yuya & Maruyama, Munetoshi, 2023, Taxonomy of the Lathrobium nomurai group (Coleoptera: Staphylinidae) from Northern Kyushu, Japan, with descriptions of two new species, Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 63 (1), pp. 111-124 : 121

Key to the species of the Lathrobium nomurai group of Kyushu, Japan

1 Basal margin of aedeagus with V-shaped impression ( Fig. 2A ). .................................................................. 2

– Basal margin of aedeagus rounded. .......................... 4

2 Internal sac of aedeagus with large sclerotized plate in dorsal side ( Fig. 3B ). ................................................... ............................... L. fujimotoi Y. Watanabe, 2001

– Internal sac of aedeagus without sclerotized plate in dorsal side. ................................................................ 3

3 Apical part of ventral process curved toward right side in ventral view ( Fig. 6A ). .......... L. yufuense sp. nov.

– Apical part of ventral process slightly curved toward left side in ventral view ( Fig. 2A ). .............................. ........................................ L. nomurai Nakane, 1955

4 Dorsal plate of aedeagus triangular ( Fig. 4C ). ............ .......................... L. hikosanense Y. Watanabe, 1998

– Dorsal plate of aedeagus oblong ( Fig. 8C ). ................. .................................................... L. denchu sp. nov.

Figures

Fig. 2. Male aedeagus of Lathrobium nomurai Nakane, 1955: A – ventral view; B – lateral view; C – dorsal view. Scale bar = 0.5 mm. Abbreviations: AP – apical part of ventral process; BF – basal foramen; DP – dorsal plate; VP – ventral process. Black arrow indicates the V-shaped impression of basal margin of aedeagus.

Fig. 3. Male aedeagus of Lathrobium fujimotoi Y.Watanabe, 2001:A – ventral view; B – lateral view; C – dorsal view. Scale bar = 0.5 mm.Abbreviation: SP – large sclerotized plate of internal sac.

Fig. 6. Male aedeagus of Lathrobium yufuense sp. nov.A – ventral view; B – lateral view; C – dorsal view. Scale bar = 0.5 mm.

Fig. 4. Male aedeagus of Lathrobium hikosanense Y. Watanabe, 1998 in each locality.A–C – Mt. Hiko-san (type locality): A – ventral view; B – lateral view; C – dorsal view. D, J – Mt. Daisen; E, K – Hiraodai; F, L – Mt. Buccho-zan; G, M – Mt. Tachibana-yama; H, N – Mt. Iwara-yama; I, O – Kinsenji Temple. Scale bars = 0.5 mm. Each locality referred to Fig. 9.

Fig. 8. Male aedeagus of Lathrobium denchu sp. nov.A – ventral view; B – lateral view; C – dorsal view. Scale bar = 0.5 mm.