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 brasiliensis
GUÉRIN, 1829
(
Figs 4
a-f, 38 B)
Osorius asymetricus
FAUVEL, 1901: 72
new synonymy
Type
material examined:
Brazil
:
without further data,
1 female
det. as
O. tardustardus
Dej
(
neotype
,
BMNH
)
;
Venezuela
:
1 male
without further data (
syntype
of
O. asymetricusasymetricus
with remarks of Fauvel given by Sharp ‘trés semblable a canaliculatus
’
,, (
IRSNB
).
Additional material examined:
Venezuela
:
Ve
Caripe (
10°10' N
, 63°63' W),
7.4.1998
, leg.
M. v. Tschirnhaus
,
21 specimens
collected in rotten log (
UIC
)
;
Caracas
(
66°53' W
,
10°26' N
),
San Esteban
(
70°06' W
,
10°57' N
),
1.11.1888
, leg.
Simon
(
O. asymetricus
)) (
IRSNB
)
;
1 specimen
det. as
O. intermediusintermedius
by
Cameron
(
BMNH
)
;
près de
Puerto Cabello
,
1 specimen
, 1st trimestre 1877, leg.
H. de Sagan
(
BMNH
)
;
as
punctatelluspunctatellus
Bernh.
manuscript name,
1 specimen
,
Nov. 1888
, leg.
E. Simon
(
BMNH
)
,
2 specimens
,
Nov. 1888
, leg.
E. Simon
(
BMNH
,
IRSNB
)
;
1 specimen
,
Mus. Drews
(
ZMUK
)
;
Maracay
(
67°35' W
,
10°14' N
)
19 km
N, road to
Choroni
, litter near stream,
1 specimen
,
16.4.1994
, leg.
L. Herman
;
1 specimen
,
26.4.1946
, leg.
W. Beebe
,
Rancho Grande
,
1 specimen
,
21.6.1946
, leg.
W. Beebe
(
AMNH
)
;
Miranda
(
68°23' W
;
10°08' N
),
19 km
N, road to
Choroni
,
Agua Blanca
, humid trop. forest,
1 specimen
,
15.02.1987
, leg.
M.G. Paoletti
(
AMNH
)
;
Tovar
(
71°45' W
,
8°20' N
),
1 specimen
, det. as
O. asymetricusasymetricus
by
Fauvel
(
IRSNB
)
;
Puerto Cabello
(
68°00' W
,
10°27' N
),
1 specimen
, leg.
E. Bugnion
(
IRSNB
)
;
Carabobo
(
61°24' W
,
6°18' N
),
Mun. Bejuma
,
Via Palmichal
,
1 specimen
,
15.11.2005
, leg.
L. Brachat
(
AC
)
;
Trinidad
:
1 specimen
, 1904, leg.
F. Birch
(
BMNH
)
;
Tobago
,
St. Mary's Pa. Gilpin Trace
,
1 specimen
,
14.6.1991
, leg.
D. Brzoska
(
KU
)
;
Guyana
:
without further data,
2 specimens
, leg.
Lansberg
(
ZMUK
)
;
French
Guyana
:
1 specimen
without further data, coll.
Sharp
(
BMNH
)
;
Roura
(
52°19' W
,
4°43' N
),
2 specimens
,
8.1.1999
, leg.
P. Krásensky
(
JC
)
;
Saül
(
53°12' W
,
3°37' N
),
Les Eaux
claires,
1 specimen
under bark,
14.11.1995
, leg.
A. Berkov
(
AMNH
)
;
Matoury
(
52°19' W
,
4°50' N
), trail,
Sentier de la Miranda
, primary tropical rainforest under wood and bark,
2 specimens
,
18.12.2004
, leg.
J. Huff
(
AMNH
)
;
Suriname
:
Sarmaca
,
1 specimen
under bark,
6.8.1980
, leg.
M. Russell
(
BMNH
)
;
Columbia
:
Santa Marta
(
74°08' W
,
11°13' N
),
Sierra Nevada
,
Buritaca-Remol
ino trail,
1 specimen
,
11.12.1974
, leg.
M. Cooper
(
BMNH
)
;
Columbia
without further data, det. as
tardustardus
Déjean, Mus. Drews (ZMUK)
;
Ecuador
:
1 specimen
, 1879, leg.
Buckley
(
BMNH
)
;
Sucumbios
,
Shushufindi
(
76°38' W
,
0°11' S
),
1 specimen
,
8.12.2004
, leg.
P. Banar
(
JC
)
;
1 specimen
without further data, 1879, leg.
Buckley
(
BMNH
)
;
Brazil
:
Mato Grosso
(
51°47' W
,
12°50' S
),
1 specimen
,
10.10.1968
, gallery forest, leg.
O. W. Richards
(
BMNH
)
.
Diagnosis:
The species is very similar to
O. intermedius
and can be hardly distinguished from that species without analysis of the aedeagus. The indistinct depressions at the posterior angles of pronotum seem to be absent in
O. intermedius
,
and the elytra seem to be more shiny in
O. brasiliensis
. The prosternal process in
O. brasiliensisbrasiliensis
is more triangularly shaped than in
O. intermediusintermedius
and in apical aspect, the process is usually emarginate in the middle. However, the shape of the process is varying in both species and reflects no consistent character. The aedeagus in
O. brasiliensisbrasiliensis
is slightly asymmetric with a straight short apex, while apex in
O. intermediusintermedius
is hook-like and thicker. As already mentioned for
O. alternans
, the asymmetric shape of labrum in
O. asymmetricus
described by FAUVEL (1901) is not valid because of the movable character of the labrum.
Description:
Length
:
12.5 – 14.5 mm
.
Colour
: black.
Head
::
1.8 mm
long,
2.7 mm
wide; with eyes half as long as temples; front edge of clypeus emarginate with two or three obtuse short lateral teeth on each side; central part of emargination indistinctly prominent; with reduced supraocular striae and distinct postocular striae; 3 to 4 supraocular granular setiferous punctures; punctation on disc distinct, but sparse; distance between punctures on average twice as wide as diameter of punctures; one granular setiferous puncture on each side of middle near neck; isodiametric microsculpture distinct; surface shiny.
AntennaeAntennae
with 2
nd
antennomere oval; half as long as conical 3
rd
antennomere; antennomeres 4 to 5 longer than wide and decreasing in length; subsequent antennomeres more or less quadrate, but penultimate antennomeres slightly shorter than 6
th
antennomere.
Pronotum
:
2.2 mm
long,
2.8 mm
wide; widest at tooth-like prominent anterior angles; in anterior half lateral margin small; distinctly widened to posterior angles; indistinct flat depression at posterior angles; punctation as dense and sparse as on head, but varying in size; with deeper and larger punctures near posterior edge and on lateral disc; between normal, large punctation with sparse micro-punctation; on each side of middle a slightly larger granular setiferous puncture; longitudinal depression in midline varying in depth; distinct microsculpture isodiametric; as deep as on head, but surface slightly mattet; anterior prosternal process triangular; with two or three granular setiferous punctures; front edge of process slightly concave.
Elytra
: 3.0 mm long,
2.9 mm
wide; with weak and sparse coriaceous ground sculpture; punctation deeper and larger than on pronotum, but distinctly sparser; without remains of microsculpture; surface nearly polished.
AedeagusAedeagus
with short apical part; broad at base and abruptly narrowed shortly in front of acute apex.