Lathrimaeum nigrum (Cameron, 1924)

Shavrin, Alexey V. & Smetana, Aleš, 2017, A revision of Eastern Palaearctic Anthobium Leach, 1819 (Coleoptera: Staphylinidae: Omaliinae: Anthophagini). I. Gracilipalpe, morchella and nigrum groups, Zootaxa 4365 (1), pp. 1-39 : 22-23

3.3.1. Key to nigrum group

1 Anterior angles of pronotum strongly protruded anteriad. Elytra markedly wider than long. Aedeagus as in Fig. 77 . Habitus as in Fig. 67 . Body length: 3.90–4.20 mm. China: Yunnan ........................................ A. conjunctum sp.n.

- Anterior angles of pronotum slightly protruded anteriad. Elytra as wide as long or slightly longer than wide............. 2

2 Punctation of pronotum very dense. Aedeagus very wide basally, markedly, evenly narrowed toward apex of median lobe ( Fig. 80 ). Habitus as in Fig. 68 . Body length: 3.50–4.27 mm. China: Yunnan ........................ A. densepunctatum sp.n.

- Punctation of pronotum sparse. Aedeagus of different shape, not very wide basally ( Figs. 70, 72 ), sometimes quite narrow ( Fig. 82 )................................................................................................ 3

3 Pronotum slightly flattened in cross section, with indistinct medio-basal impression. Aedeagus as in Fig. 72 . Habitus as in Fig. 66 . Body length: 4.15–4.37 mm. China: Gansu ............................................. A. anishchenkoi sp.n.

- Pronotum very convex, with deep medio-basal impression.................................................... 4

4 Elytra as wide as long. Apical part of median lobe of aedeagus narrow, apical portions of parameres very wide ( Fig. 82 ). Habitus as in Fig. 69 . Body length: 4.00– 4.71 mm. Nepal, Bhutan........................................ A. ivani sp.n.

- Elytra slightly longer than wide. Apical part of median lobe of aedeagus wide, apical portions of parameres relatively narrow ( Fig. 70 ). Habitus as in Fig. 65 . Body length: 3.44–4.75 mm. India........................ A. nigrum ( Cameron, 1924)

Figures

FIGURES 77–78. Aedeagusof Anthobium conjunctum (paratype):77—parameral view, 78—lateral view. Scale bar: 0.1mm.

FIGURES 65–69. Habitus of Anthobium: 65—A. nigrum (INDIA: Uttarkashi), 66—A. anishchenkoi (paratype), 67—A. conjunctum (holotype), 68—A. densepunctatum (holotype), 69—A. ivani (paratype).Scale bars: 1.0 mm.

FIGURES 80–83. Aedeagus of Anthobium densepunctatum (80–81—paratype), A. ivani (82–83—paratype): 80, 82— parameral view, 81, 83—ateral view. Scale bars:0.1 mm.

FIGURES 70–73. Aedeagus of Anthobium nigrum (70–71—INDIA: Uttarkashi) and A. anishchenkoi (72–73—paratype): 70, 72—parameral view, 71, 73—lateral view.Scale bars:0.1 mm.