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 smokiensis
Sokolov
,
new species
Figure 4
,
9
,
14
,
17
Holotype
.
Male
labeled /
TENNESSEE
:
Blount Co.
, GSMNP,
Gregory cave
,
35°36.59’N
83°48.35’W
,
605m
.
Litter
sifting at entrance.
14 April 2006
A.K. Tishechkin
/
HOLOTYPE
,
Anillinus smokiensis
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.
Tennessee
, Blount County, Great Smoky Mountain National Park, southern slopes of Rich Mountain ridge, Gregory Cave at
35°36.59’N
83°48.35’W
.
Paratypes
(7). One male with the same data as
holotype
. Two males and
four females
labeled /TEN- NESSEE: Blount Co., GSMNP, Gregory cave,
35°36.59’N
83°48.35’W
. Litter sifting at entrance.
28.VII. 2004
V
.Bayless C.Carlton A. Tishechkin/ and
one male
and
one female
from those bear labels /Molecular voucher # 93/ and /Molecular voucher # 94/, respectively.
Etymology.
The name of this species is a Latinized adjective based on the name of the mountain region in which this species occurs.
Description
. Large-sized for genus (ABL range
1.86-1.93 mm
, mean 1.90±
0.029 mm
, n=7). Habitus (
Fig. 4
) moderately convex, subparallel (WE/ABL 0.37±0.012), head of normal proportions for the genus (WH/WPm 0.74±0.019), pronotum narrow compared to elytra (WPm/WE 0.81±0.017). Body color rufotestaceous, appendages testaceous. Dorsal microsculpture mostly effaced, polygonal microsculpture present on a small triangular area at middle of vertex and in frontal furrows on head, and also on base of pronotum; most parts of vertex, lateral parts of head, disc and front part of pronotum with effaced microsculpture. Elytra with well-developed polygonal microsculpture.
Pronotum (
Fig. 9
) moderately convex and comparatively transverse (WPm/LP 1.33±0.025), with margins rectilinear and moderately constricted posteriad (WPm/WPp 1.31±0.023). Anterior angles indistinct, only slightly prominent. Posterior angles obtuse (100-120°). Width between posterior angles only slightly greater than between anterior angles (WPa/WPp 0.97±0.020).
Elytra moderately convex, slightly depressed along suture, of normal length for genus (LE/ABL 0.56±0.009), with traces of 3-4 interneurs. Humeri rectangular, moderately 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. 14a
) evenly arcuate and twisted, with pointed apex slightly tapering and shortly rounded at tip. The wall of median lobe forming evident incision and characteristic beak like fold above the apex. Ventral margin of median lobe not enlarged, bearing numerous poriferous canals scattered across the ventral side of the lobe. Dorsal copulatory sclerites forming a curled blade-like structure with characteristic basal prolongations. Ventral sclerite of internal sac absent. Spines represented by three groups: 7-8 small spines are nearby the apical part of dorsal sclerites, group of about 20 long spines occupy the space near apex of median lobe, and two spines above the preceding group of spines. Also a small band with minute sclerotized setose structures extends above the end of dorsal sclerites in ostial area. Left paramere (
Fig. 14b
) not enlarged, paramere apex with four poriferous canals, but bearing only two small setae in distal positions. Right paramere (
Fig. 14c
) short, with subparallel apical portion, bearing four long setae that are longer than the paramere itself.
Distribution.
Known only from Blount County, TN, where it was collected in a cave on the southern slopes of Rich Mountain ridge, within GSMNP (
Fig. 17
).
Habitat.
The series of specimens was collected by sifting a thick, wet layer of leaves along the dry bed of an ephemeral stream near the entrance of the cave. The locality is situated in a limestone area in pinemixed hardwood forest at relatively low altitude (
600 m
).
Differential diagnosis.
Anillinus smokiensis
belongs to the troglobitic valentinei-group of species. In addition to
A. valentinei
(Jeanell)
, the
type
species of the older genus
Troglanillus
Jeannel
, which was synonymized with
Anillinus
by Barr (
Barr 1995
), the group includes several undescribed species from the caves of
Alabama
. Besides the habitat, this group is characterized by the combination of comparatively large size, mostly reduced microsculpture on foreparts, and the presence of rows of large spines in the internal sac of median lobe.
Anillinus smokiensis
is distinguished from
A. valentinei
by the form of the median lobe and armature of the internal sac (cf.
Jeannel 1963
: p.147, fig. 2), and especially by the smaller size (cf.
2.3-2.7 mm
of
A. valentinei
).
Anillinus smokiensis
apparently is the only cavernicolous anilline species in the Smokies. Many species may be found incidentally in caves, especially near entrances, but are also found in epigean leaf litter not associated with caves. Externally,
A. smokiensis
can be distinguished from all species of
Serranillus
by the presence of long discal elytral setae. From
Anillinus
species
inhabiting low and mid elevations of GSMNP,
A. smokiensis
can be distinguished by the effaced microsculpture of the pronotum.