Lomechusoides

Jászay, Tomáš & Hlaváč, Peter, 2013, A taxonomic revision of the myrmecophilous genus Lomechusoides Tottenham, 1939 (Coleoptera: Staphylinidae: Aleocharinae) Part I. Redescription of the genus, definition of species groups and the revision of the amurensis Wasmann 1897 species group, Zootaxa 3683 (1), pp. 65-81 : 69

Key to the species groups of the genus Lomechusoides

1 Apical half of femora with a bunch of dense and long setae ( Fig. 10 )............................................ 2

- Apical half of femora with normal setation (setae not longer than one fourth of width of femora) or in whole glabrous, lacking any setation.......................................................................................... 3

2 Setae on posterior margin of elytra directed towards posterior corners of elytra ( Fig. 13 ), pronotum more rectangular, anterior margin with uneven microsculpture.................................................. species group L. strumosus

- Setae on posterior margin of elytra in internal, sutural half directed against each other and in external half directed towards posterior corners of elytra ( Fig. 14 ), pronotum trapezoidal with broadly rounded anterior corners, pronotum in anterior fifth matt, with strong microsculpture..................................................... species group L. amurensis

3 Setae on posterior margin of elytra directed towards posterior corners of elytra, pronotum and elytra lacking macrosetae..................................................................................... species group L. straneoi

- Setae on posterior margin of elytra in internal, sutural half directed against each other and in external half directed towards posterior corners of elytra, pronotum and elytra with macrosetae...............................species group L. minor

Figures

FIGURES 7 – 13. L. strumosus, 7, 3 pronotum, dorsal view (L: 1.20 mm, W: 1.95 mm) (scale: 0.5 mm); 8, 3 pronotum, ventral view (L: 1.20 mm, W: 1.95 mm) (scale: 0.5 mm); 9, 3 metaventrite ventral view (L: 1.30 mm, W: 1.75 mm) (scale: 0.5 mm); 10, 3 chaetotaxy – mesothoracic leg, apical part of femur; 11 a, 3 tergite VIII (scale: 0.5 mm); 11 b, 3 sternite VIII (scale: 0.5 mm); 12 a, Ƥ tergite VIII (scale: 0.5 mm); 12 b, Ƥ sternite VIII (scale: 0.5 mm); 13, posterior margin of right elytra, chaetotaxy

FIGURES 14 – 20. L. amurensis, 14, posterior margin of right elytra, chaetotaxy; 15, head, dorsal view (L: 0.95 mm, W: 0.75 mm) (scale: 0.5 mm); 16, 3 antenna (scale: 0.5 mm); 17, Ƥ pronotum, dorsal view (L: 1.10 mm, W: 1.57 mm) (scale: 0.5 mm); 18 a, 3 metaventrite (L: 1.15 mm, W: 1.35 mm) (scale: 0.5 mm); 18 b, 3 metaventral process; 19 a, 3 tergite VIII, (scale: 0.5 mm), 19 b, 3 sternite VIII (scale: 0.5 mm); 20 a, Ƥ tergite VIII (scale: 0.5 mm), LECTOTYPE of L. ganglbaueri; 20 b, Ƥ sternite VIII (scale: 0.5 mm). LECTOTYPE of L. ganglbaueri.