Metopiellus

Asenjo, Angélico, Ferreira, Rodrigo Lopes & Zampaulo, Robson De Almeida, 2017, Description of Metopiellus painensis sp. nov. (Coleoptera, Staphylinidae), first troglobitic Pselaphinae from Brazil, Zootaxa 4269 (1), pp. 115-123 : 122

Key to the species of Metopiellus

1. Head similar in width to pronotum; eyes absent...................................... Metopiellus aglenus (Reitter)

- Head narrower than pronotum; eyes small or almost absent....................................................2

2. Pedicel almost one half of length of scape ( Figs. 2, 5 ); length of antennomere 5 longer than length of antennomere 3 and 4 together ( Fig. 5 )............................................................... Metopiellus painensis sp. nov.

- Pedicel less than half length of scape ( Figs. 14, 15 ); length of antennomere 5 shorter than length of antennomere 3 and 4 together ( Figs. 14, 15 )..................................................................................3

3. Antennomere 8 transverse ( Fig. 15 ); eyes small ( Fig. 15 )............................... Metopiellus hirtus (Reitter)

- Antennomere 8 obconical ( Fig. 14 ); eyes almost absent ( Fig. 14 )........................ Metopiellus silvaticus Bruch

Figures

FIGURES 1 – 12. Metopiellus painensis sp. nov., holotype, 1, habitus, dorsal view: 2, habitus, left lateral view; 3, head, pronotum and elytra, dorsal view; 4, first leg; 5, left antenna, lateral view; 6, Tergum VIII (T 8); 7, Sternum VIII (S 8); 8, right tergum IX (T 9); 9, left tergum IX (T 9); 10, aedeagus, ventral view; 11, aedeagus, lateral view; 12, aedeagus, dorsal view. Scale bars: 0.2 mm.

FIGURES 13 – 15. Habitus, 13, Metopiellus painensis sp. nov.; 14, Metopiellus silvanicus; 15, Metopiellus hirtus. (13, Paratype; 14, after Bruch 1933; 15, after Reitter 1885; slightly modified).