Thaumastocephalus, Poggi, Nonveiller, Colla, Pavicevic & T. Rada, 2001

Hlaváč, Peter, Bregović, Petra & Jalžić, Branko, 2019, Endogean and cavernicolous Coleoptera of the Balkans. XVIII. Strong radiation in caves of the Central Dinarides: seven new species of Thaumastocephalus Poggi et al., 2001 (Staphylinidae: Pselaphinae), Zootaxa 4559 (1), pp. 90-110 : 99

Key to males of Thaumastocephalus

1 Small species, body length under 1.85 mm, aedeagus ( Fig. 1 )............................... T. bilandzijae Poggi et al.

- Larger species, body length more 1.90 mm ................................................................. 2

2 Protibiae in males modified, with well-defined median tooth................................................... 3

- Protibiae in males slightly modified, median tooth minuscule or absent........................................... 4

3 Large species, body length 2.2 mm, head much longer than wide, ratio: 1.43–1.47, aedeagus (see Poggi et al. 2001: Fig. 10 )................................................................................ T. folliculipalpis Poggi et al.

- Small species, body length about 1.95 mm, head shorter than wide, ratio: 1.30, aedeagus ( Fig. 7 ).......... T. dahnae sp. n.

4 Larger species, body length over 2.5 mm, aedeagus ( Fig. 6 )........................................ T. troglavi sp. n.

- Smalle species, body length under 2.0 mm................................................................. 5

5 Antennae short, less than 0.85 mm long, scape more than 2.3 times as long as pedicel, terminal antennomere short, less than 4.00 times as long as antennomere X...................................................................... 6

- Antennae long, about 0.88 mm long, scape less than 2.2 times as long as pedicel, terminal antennomere long, 4.25 times as long as antennomere X, rostrum long, only 1.78 times as wide as long, aedeagus ( Fig. 5 )................. T. slavkoi sp. n.

6 Elytra short, less than 1.2 times as long as pronotum, aedeagus ( Fig. 4 )............................ T. rujnicensis sp. n.

- Elytra long, more than 1.3 times as long as pronotum......................................................... 7

7 Rostrum long, about 2.3 times as wide as long, aedeagus ( Fig. 3 )................................... T. marsici sp. n.

- Rostrum short and wide, about 3.0 times as wide as long, aedeagus ( Fig. 2 ).............................. T. kirini sp. n.

Figures

FIGURES 1–4. 1—Thaumatocephalus bilandzijae sp. n., aedeagus, dorsal view (scale: 0.1 mm); 2—Thaumatocephalus kirini sp. n., aedeagus, dorsal view (scale: 0.2 mm); 3—Thaumatocephalus marsici sp. n., aedeagus, dorsal view (scale: 0.2 mm); 4—Thaumatocephalus rujnicensis sp. n., aedeagus, dorsal view (scale: 0.1 mm).

FIGURES 10–12. 10—entrance to Peć u Čulinovim raljevinama (cave), type locality (photo Marko Lukić); 11— Thaumatocephalus bilandzijae sp. n., habitus in situ (photo Alen Kirin); 12—topographical map of the type locality (the finding place of the T. bilandzijae sp. n. is marked with red dots).

FIGURES 5–9. 5—Thaumatocephalus slavkoi sp. n., aedeagus, dorsal view (scale: 0.1 mm); 6—Thaumatocephalus troglavi sp. n., aedeagus, dorsal view (scale: 0.2 mm); Thaumatocephalus dahnae sp. n., 7—aedeagus, dorsal view (scale: 0.1 mm); 8— protibiae (scale: 0.1 mm); 9—maxillary palpomere (scale: 0.1 mm).