The Neotropical species of the genus Osorius G - M, 1829 with remarks to the Neotropical Osoriid complex (Coleoptera: Staphylinidae: Osoriinae)
Author
Irmler, Ulrich
text
Beiträge Zur Entomologie = Contributions to Entomology
2010
2010-12-20
60
2
363
426
https://www.contributions-to-entomology.org/article/view/1782
journal article
10.21248/contrib.entomol.60.2.363-426
0005-805X
5212736
Osorius sahlbergi
BERNHAUER
,, 1920: 137
(Figs 31 a-c)
Type
material examined:
Brazil
:
Rio de Janeiro
,
Petropolis
(
43°10' W
,
22°31' S
),
2 males
,
1 female
,
Dec. 1850
, leg.
Sahlberg
(
syntypes
,
FMNH
)
.
Additional material examined:
Brazil
:
without further data (
IRSNB
)
;
Rio de Janeiro
(
43°14' W
,
22°49' S
),
Caminho do Bico do Papagaio
,
3 specimens
,
16.12.1959
, leg.
H. Schubart
(
UIC
)
;
Rio de Janeiro
,
1 specimen
without further data (
IRSNB
)
;
Floresta da Tijuca
,
1 specimen
,
17.3.1962
, leg.
Th. Becker
(
UIC
)
;
Itatiaia
(
43°43' W
,
22°42' S
), E. of
Rio de Janeiro
,
1 specimen
,
6.7.1961
, leg.
O. Mielke
(
UIC
)
;
Minas Gerais
,
Piquete
(
45°10' W
,
22°36' S
),
D. Morcina
,
1500 m
elevation,
2 specimens
,
1.10.1957
, leg.
R. Arlé
;
1 specimen
,
5.1.1960
, leg.
R. Arlé
and
Schubart, H.
(
UIC
)
;
São Paulo
,
Campos de Jordão
,
103 specimens
,
15.7.1957
, leg.
K. Lenko
(
AMNH
)
.
Diagnosis:
The species is characterised by the prominent lateral angles of the clypeus, which are similar to those in
O. ater
.
O. sahlbergisahlbergi
is distinctly smaller, and lateral teeth of clypeus less prominent and more obtuse at apex. The aedeagus is characterised by the obtuse emarginate apex that is similar to the aedeagus of
O. ashei
, but the apical part of the aedeagus in
O. asheiashei
is longer than in
O. sahlbergi
.
Description:
Length
: 10.5 – 11.0 mm.
Colour
: black.
Head
:: 2.0 mm,
2.2 mm
wide; punctation distinct, distance between punctures as wide as or shortly wider than diameter of punctures; with isodiametric microsculpture; surface slightly shiny; clypeus with distinctly prominent front angles; more or less obtuse at apex, at inner side of lateral prominences with a long seta; labrum slightly emarginate in centre; not projecting clypeal emargination; disc at antennal base shiny; eyes relatively large; nearly as long as temples; few postocular striae and granular punctures.
AntennaeAntennae
with 2
nd
antennomere short, as long as wide; 3
rd
conical and slightly longer than 2
nd
; antennomeres 4 to 6 slightly longer than wide; subsequent antennomeres quadrate.
Pronotum
:
1.9 mm
long,
2.3 mm
wide; punctation and microsculpture similar to head; with a short, longitudinally depressed midline; widest at front angles; continuously narrowed to posterior angles; front angles acute with a prominent tooth; lateral margin narrow at front angles, distad widened to posterior angles; front edge without margin, posterior edge with distinct margin.
Elytra
:
2.5 mm
long,
2.3 mm
wide; surface shiny, with deep and sparse punctures, surface coriaceously sculptured.
AedeagusAedeagus
pear-shaped with short and broad apical part ending in a flattened concave apex.