Review of the Nearctic species of Drusilla Leach (Coleoptera: Staphylinidae: Aleocharinae)
Author
Eldredge, Taro
text
Zootaxa
2012
3300
45
54
journal article
10.5281/zenodo.210858
6c13241a-b0ff-420a-acf0-8b9cbd3b9703
1175-5326
210858
1.
Drusilla canaliculata
(
Fabricius, 1787
)
Staphylinus canaliculatus
Fabricius, 1787
: 221
.
Drusilla canaliculata
: Leach
in
Samuelle, 1819: 177.
Drusilla cavicollis
Casey, 1906
: 322
.
See
Gusarov (2003)
and
Assing (2005a
,
2005b
) for further synonymies.
Diagnosis.
Drusilla canaliculata
can be easily separated from
D. nearctica
and
D. ashei
by its larger body size (significantly greater than
3.6 mm
) and the broadly emarginate apex of the eighth tergite with serrate margin.
See:
Casey (1906: 322)
and
Lohse (1974: 222–223)
for descriptions;
Assing (2006: 283)
for habitus images (both sexes), apex of the eighth tergite (both sexes; females have a slightly more shallow emargination and lateral apices of emargination less produced), lateral view of the median lobe and spermatheca;
Gusarov (2003: 112)
for an illustration of the internal sac;
Werner
et al.
(2007
: 838) for a SEM of the copulatory piece and mechanism of sperm transfer.
Discussion.
The
type
material of
Staphylinus canaliculatus
Fabricius, 1787
, was not examined in this study because this is a widespread, well-documented species. Possibly due to a combination of wide distribution and aptery (
Assing 2005b
), this species shows a range of subtle morphological variation and this may have contributed to the large number of synonyms.
Distribution
.
In
North
America
,
D.
canaliculata is known mainly from the northeastern
United States
and provinces of
Canada
, including: Alaska (
Casey 1906
; but most likely not established,
Gusarov 2003
), Kentucky (
Gusarov 2003
), Massachusetts (FMNH), New York (
Seevers 1978
,
Muona 1984
,
Gusarov 2003
; personal observations)
, Pennsylvania (
Seevers
1978
), Ontario (
Gusarov
2003
),
Prince Edward Island (
Majka & Klimaszewski
2008), and Quebec (
Gusarov
2003
).