New species and additional records of Cephalocousya and Drepasiagonusa from China and Russia (Coleoptera: Staphylinidae: Aleocharinae: Oxypodini)
Author
Assing, Volker
text
Linzer biologische Beiträge
2018
2018-07-27
50
1
75
88
journal article
21217
10.5281/zenodo.3985285
ba4d8b5b-a019-4f7b-a8df-af225074fef4
0253-116X
3985285
Genus
Drepasiagonusa
PACE
,
2012
According to the original description, the genus is characterized by the shape of the mandibles (
Figs 11
,
37
), an elongated spermatheca (
Figs 5
,
20-21
,
31-32
,
39
), and an apically divided and strongly sclerotized ligula (
Fig. 12
). The remaining characters indicated by
PACE (2012)
apply to the majority of Palaearctic genera of
Oxypodini
. Based on the species studied in the course of the present study, additional characters are a large head (in relation to the pronotum) and the shape of the antennae (fine; weakly incrassate at most).
Figs 1-9
:
Cephalocousya yunnanica
(
1-3
),
Drepasiagonusa smetanai
(
4-5
), and
D. procera
(
6-9
): habitus (
1, 6
); spermatheca (
2-3, 5
); median lobe of aedeagus in lateral view (
4
); forebody (
7
); antenna (
8
); abdomen (
9
). Scale bars: 1, 6: 1.0 mm; 7-9: 0.5 mm; 2-3: 0.2 mm; 4-5: 0.1 mm.
Figs 10-21
:
Drepasiagonusa tibetica
: habitus (
10
); left mandible (
11
); ligula (
12
); male tergite VIII (
13
); male sternite VIII (
14
); median lobe of aedeagus in lateral view (
15-17
); apical portion of median lobe in ventral view (
18
); female sternite VIII (
19
); spermatheca (
20-21
). Scale bars: 10: 1.0 mm; 13-14, 19: 0.2 mm; 11, 15-18, 20-21: 0.1 mm; 12: 0.05 mm.
Figs 22-32
:
Drepasiagonusa angulata
: habitus (
22
); forebody (
23
); antenna (
24
); abdomen (
25
); male tergite VIII (
26
); male sternite VIII (
27
); median lobe of aedeagus in lateral view (
28-29
); female sternite VIII (
30
); spermatheca (
31-32
). Scale bars: 22: 1.0 mm; 23, 25: 0.5 mm; 24, 26-27, 30: 0.2 mm; 28-29, 31-32: 0.1 mm.
Figs 33-39
:
Drepasiagonusa feldmanni
(
33-36
) and
D. procera
(
37-39
): habitus (
33
); male sternite VIII (
34
); median lobe of aedeagus in lateral and in ventral view (
35-36
); head (
37
); female sternite VIII (
38
); spermatheca (
39
). Scale bars: 33: 1.0 mm; 34, 37-38: 0.2 mm; 35-36, 39: 0.1 mm.
Map 1
: Distributions of
Drepasiagonusa
species in the East Palaearctic region:
D. smetanai
(white circles);
D. procera
(black diamond);
D. tibetica
(black triangles);
D. angulata
(black circles);
D. feldmanni
(black star);
D
. sp. 1 (black square);
D
. sp. 2 (white diamond).
Material of seven species, six from
China
and one from East
Russia
, was examined. Four species are newly described. Two species with weakly distinctive external characters from the Chinese province Shaanxi remain undescribed for want of males. The spermatheca of
Drepasiagonusa
species is of rather uniform shape (little interspecific variation) and consequently of little use for taxonomic purposes.