New species of Anillinus Casey (Carabidae: Trechinae: Bembidiini) from the Southern Appalachians and phylogeography of the A. loweae species group
Author
Sokolov, Igor M.
Author
Carlton, Christopher E.
text
Zootaxa
2010
2502
1
23
journal article
10.5281/zenodo.195855
894cdac4-4f41-4d3d-a4a0-d606f3f1e3c4
1175-5326
195855
Anillinus juliae
Sokolov & Carlton
,
sp.n
(
Figs. 2
,
11
,
21
,
29
,
36
,
37
,
38
; 39,
Table 1
)
Type
material.
Holotype
.
Male labeled /
USA
– TN: McMinn Co., Starr Mtn., White Cliff at
35°20.067’ N
84°24.514’ W
,
630m
, oak forest, litter berlese
20 Oct 2007
Sokolov I.M. /
HOLOTYPE
,
Anillinus juliae
Sokolov and Carlton
, des. 2008/. Deposited
U.S.
National Museum (
USNM
).
Type
locality.
U.S.
A, TN, McMinn Co., north-eastern part of Starr Mountain,
35° 20.067’ N
84°24.514’ W
.
Paratypes
(3). One male and two females with the same data as
holotype
. One female and one male bear labels /Molecular voucher # 42/ and /Molecular voucher # 43/, respectively.
Etymology.
This species is named after Julia (=Yuliya) Sokolova, the wife of the senior author to commemorate her patience and wisdom during shared collection trips across the planet, and her constant help in sequence analyses of
Anillinus
.
FIGURES 14–15.
Contour of apical half of male aedeagus of (14)
Anillinus steevesi
Barr
from type locality (GA, Dade Co., Cloudland Canyon State Park); and (15)
A. steevesi
from GSMNP, (TN, Blount Co., Hazel Creek valley), right lateral aspect.
Description
. Medium for genus and comparatively small for the group (ABL range
1.61–1.84 mm
, mean 1.72±0.100 mm, n=4). Habitus (
Fig. 2
) markedly convex, ovoid (WE/ABL 0.37±0.012), head normally proportioned for genus (WH/WPm 0.73±0.022), pronotum narrow compared to elytra (WPm/WE 0.79±0.003). Body color brunneorufus, appendages testaceous. Dorsal microsculpture distinct, covering pronotum and head except for two paramedian patches on vertex without microsculpture. Elytra with welldeveloped polygonal microsculpture.
Pronotum moderately convex and comparatively elongate (WPm/LP 1.29±0.016), with margins rectilinear and moderately constricted posteriad (WPm/WPp 1.29±0.035). Anterior angles evident, slightly prominent. Posterior angles slightly obtuse (100–110°). The distances between posterior angles and anterior angles approximately the same (WPa/WPp 0.98±0.028).
Elytra moderately convex, slightly depressed along suture, length normal for genus (LE/ABL 0.55±0.004), with traces of 1–2 interneurs. Humeri rounded, oblique, in outline forming an obtuse angle with longitudinal axis of body. Margins subparallel, slightly divergent in basal half, evenly rounded to apex, maximal width of elytra at midpoint. Elytra without subapical sinuation. Vestiture of elytra short (less than one-third of discal setae).
Prothoracic leg of males with strongly dilated tarsomere 1. Profemur moderately swollen. Metafemur unmodified. Laterotergite VII of males unmodified.
Median lobe (
Fig. 11
a) evenly arcuate and twisted, with apex greatly enlarged (apex width ~ equal to the width of median lobe) and widely rounded. Ventral margin of median lobe moderately enlarged and with numerous poriferous canals. Canals sparsely distributed across walls of median lobe itself from the apex to the basal orifice. Dorsal copulatory sclerites forming long, waving filament-like structures extending beyond internal sac; the bases of sclerites with characteristic basal prolongations. Ventral sclerite and spines of internal sac absent. Left paramere (
Fig. 11
b) not enlarged, paramere apex with four poriferous canals, bearing four long setae. Right paramere (
Fig. 11
c) short, bearing four long setae, which are longer than the apical part of the paramere itself.
Spermatheca (
Fig. 21
) moderately sclerotized and S-shaped with wide curvatures of distal and proximal parts approximately equal in width. Cornu sclerotized distally with angulated sinuation ventrally, apically short and wide. Nodulus of medium length, ramus undifferentiated. Spermathecal duct more or less straight without definite coils. Stylomers and laterotergite IX as in
Fig. 29
. Stylomer 2 more than 1.5 times longer than wide, with thick ensiferous seta. Laterotergite bearing 8-9 setae.
Distribution.
Known only from north-eastern slope of Starr Mountain, an isolated ridge in Polk and McMinn Counties, Tennessee.
Habitat.
All beetles were collected by sifting litter on the top of the ridge. The locality is situated in xeric oak forest at moderate altitude (
640 m
).
Differential diagnosis.
Anillinus juliae
belongs to the small species of the
loweae
-group. It is distinguished from all other species in this group by the form of the median lobe and armature of the internal sac, and also by the characteristic shape of the spermatheca. Externally the new species is most similar to
A. gimmeli
,
new species
, described below, but is slightly more robust.
Anillinus juliae
occurs sympatrically with one species of
Anillinus
from the
langdoni
-group and, possibly, one or two species of
Serranillus
. Externally, it can be distinguished from all species of
Serranillus
by differences in elytral vestiture, as discussed previously. The new species can be distinguished from representatives of the
langdoni
-group by the presence of patches lacking microsculpture on the head.