Five new species of Anillinus Casey from the Southern Appalachian Mountains and the Piedmont Plateau of eastern U. S. A. (Coleoptera: Carabidae: Trechinae: Bembidiini)
Author
Sokolov, Igor M.
text
Insecta Mundi
2011
2011-04-15
2011
164
1
14
journal article
10.5281/zenodo.5160535
1942-1354
5160535
Anillinus chandleri
Sokolov
,
new species
Figure 5
,
10
,
15
,
17
Holotype
.
Male
labeled /
USA
: SC:
Edge.
Co.
, Ft. Sumter Nat. For. Jct. Rds. 235 and 139 /
VII-8-1987
RM
Reeves
, sift.
Forest
litter/
Anillinus sp
.
det.
Bell
/
HOLOTYPE
,
Anillinus chandleri
Sokolov
, des. 2009/. The
holotype
is dissected and bears a plastic rectangle with genitalia mounted in dimethylhydantoin formaldehyde resin. Deposited
USNM
.
Type locality.
U.S.A.
South Carolina
, Edgefield County, Sumter National Forest,
33°37.20’N
82°5.55’W
.
Etymology.
This species is named for Donald S. Chandler, to honor his contributions to knowledge of the litter fauna of the eastern
United States of America
.
Description
. Large for genus (ABL =
2.22 mm
). Habitus (
Fig. 5
) moderately convex, subparallel (WE/ ABL 0.38), head of normal proportions for the genus (WH/WPm 0.70), pronotum narrow compared to elytra (WPm/WE 0.81). Body color rufotestaceous, appendages testaceous. Dorsal microsculpture mostly effaced, polygonal meshes present only on a small triangular area at the middle of vertex; other parts of head and pronotum with effaced microsculpture. Elytra with well-developed polygonal microsculpture.
Pronotum (
Fig. 9
) moderately convex and of normal proportions for genus (WPm/LP 1.30), with margins rectilinear and narrowly constricted posteriad (WPm/WPp 1.23). Anterior angles evident, very slightly prominent. Posterior angles obtuse (115°). Width between posterior angles much greater than between anterior angles (WPa/WPp 0.86).
Elytra moderately convex, depressed along suture, slightly elongated (LE/ABL 0.54), with traces of 4 interneurs. Humeri rectangular and rounded. Margins subparallel, slightly divergent in basal forth, evenly rounded to apex in apical third, maximal width of elytra at midpoint. Elytra without subapical sinuation. Vestiture of elytra short (lesser than one-third of discal setae).
Prothoracic leg of males with moderately dilated tarsomere 1. Profemur moderately swollen. Metafemora unmodified. Sternum VII of males unmodified.
Median lobe of aedeagus (
Fig. 15a
) evenly arcuate and slightly twisted, with small rounded apex. Ventral margin of median lobe not enlarged with only few poriferous canals. Dorsal copulatory sclerites forming an elongate, curled filament-like structure with a wide base. Most part of distal sclerites concealed by two rows of long spines occupying the apical half of the median lobe and directed ventrally. Also a group of three small spines, directed dorsally, is located beneath the long spines, ahead the base of dorsal sclerites. Ventral sclerite of internal sac absent. Left paramere (
Fig. 15b
) not enlarged, paramere apex with three poriferous canals, but bearing only one small seta in distal position. Right paramere (
Fig. 15c
) short, with subparallel apical portion, bearing four long setae that are longer than the paramere itself.
Distribution.
Known only from Sumter National Forest, Edgefield County, South Carolina near the
Georgia
border (
Fig. 17
).
Habitat.
A single male was collected by sifting forest litter.
Differential diagnosis.
Based on external characters,
A. chandleri
belongs to the valentinei-group of species characterized by effaced microsculpture on the foreparts and presence of a spine cluster on the inner sac. Because the
Anillina
fauna of the Piedmont of the Carolinas and
Virginia
is still poorly known, the exact position of the species within the genus can be determined only after thorough investigations of the region. Probably, the closest known relative of
A. chandleri
is
A. cornelli
Sokolov and Carlton
, which also occurs in the Piedmont area along the
North Carolina
/
South Carolina
border. Both species share the same microsculpture pattern, but differ greatly in the internal sac architecture. In
A. chandleri
, the dorsal sclerites are hidden by many long spines, whereas in
A. cornelli
the spines are absent and the dorsal sclerites are clearly visible. Below those, three apically sclerotized tubercles which might represent homologues of the spines of
A. chandleri
, are located. Also,
A. chandleri
(
2.22 mm
in length) is comparatively larger than
A. cornelli
(
1.61-2.08 mm
).
Anillinus chandleri
is apparently allopatric with respect to other described species of
Anillina
. The nearest records for other species are known from about
140 km
to the north (
A. loweae
,
A. cherokee
and
A. cornelli
) and to the west (
A. turneri
).