A new genus of Oxypodina from Kyrgyzstan (Coleoptera, Staphylinidae, Aleocharinae, Oxypodini)
Author
Assing, Volker
text
Linzer biologische Beiträge
2019
2019-12-20
51
2
1357
1362
journal article
10.5281/zenodo.3745466
ea662faf-3f55-445b-a5b0-7a337060c668
0253-116X
3745466
Genus
Typhlotectusa
nov.gen.
(
Figs 1-10
)
T y p e s p e c i e s:
Typhlotectusa frischi
nov.sp.
E t y m o l o g y: The new name (gender: feminine) alludes to the complete absence of eyes and the superficial resemblance to species of the oxypodine genus
Tectusa
.
D e s c r i p t i o n: Species of small body size and slender habitus (
Fig. 1
).
Head (
Figs 2-3
) large in relation to pronotum, of orbicular shape, strongly convex in cross-section; postgenal carinae visible only posteriorly in lateral view; gular sutures broadly separated. Antenna (
Fig. 4
) moderately long, strongly incrassate apically, and with strongly transverse antennomeres IV-X. Eyes completely absent (
Fig. 3
). Labrum strongly transverse. Right mandible with pronounced molar tooth. Maxillary palpus (
Fig. 7
) with relatively short palpomeres. Labium (
Fig. 4
) with 3-jointed palpi, palpomeres moderately slender; ligula short, but slender, apically bilobed.
Pronotum (
Fig. 2
) slender, broadest anteriorly, only slightly broader than head. Elytra slender, of reduced length. Legs relatively short; all tarsi five-jointed; metatarsomere I shorter than combined length of metatarsomeres II and III. Ventral aspect of thorax not distinctive.
Abdomen slender, broadest at segments VI-VII; tergites III and IV with moderately deep, tergite V with shallow, and tergite VI without anterior impressions.
♂: sternite VIII (
Fig. 6
) with weakly convex posterior margin, not produced in the middle; morphology of the median lobe of aedeagus (
Figs 8-9
) of the
Oxypoda
type
; paramere (
Fig. 10
) with relatively short and broad apical lobe.
♀
: unknown.
C o m p a r a t i v e n o t e s: Based on external characters and particularly the morphology of the aedeagus (shape and internal structures of median lobe; shape of apical lobe of paramere), the new genus belongs to the
Oxypodina
. Among the genera of this subtribe, it is characterized particularly by a slender habitus, a strongly convex head (cross-section) with strongly incrassate antennae, relatively short maxillary palpomeres, and a slender bilobed ligula, by a short metatarsomere I, and by the shape of the male sternite VIII (posteriorly not produced). In external appearance, the genus somewhat resembles
Tectusa
, from which it is additionally distinguished by a shorter and basally or medially undilated apical lobe of the paramere.
D i s t r i b u t i o n a n d n a t u r a l h i s t o r y: The distribution of this genus is currently confined to East
Kyrgyzstan
, Middle Asia (
Map 1
). The adaptive reductions of the eyes, hind wings, and pigmentation, as well as the available ecological data suggest that the
type
species is adapted to a high-altitude habitat.