Anillinus smokiensis Sokolov, 2011

Sokolov, Igor M., 2011, Five new species of Anillinus Casey from the Southern Appalachian Mountains and the Piedmont Plateau of eastern U. S. A. (Coleoptera: Carabidae: Trechinae: Bembidiini), Insecta Mundi 2011 (164), pp. 1-14 : 9-11

publication ID	https://doi.org/ 10.5281/zenodo.5160535
persistent identifier	https://treatment.plazi.org/id/03FA87B0-FF95-7735-A786-2C70FAE7FEAE
treatment provided by	Felipe
scientific name	Anillinus smokiensis Sokolov
status	sp. nov.

Treatment

Anillinus smokiensis Sokolov View in CoL , new species

Figure 4 View Figure 1-5 , 9 View Figure 6-10 , 14 View Figure 11-15 , 17 View Figure 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 GoogleMaps / 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 View Figure 1-5 ) 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 View Figure 6-10 ) 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 View Figure 11-15 ) 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 View Figure 11-15 ) not enlarged, paramere apex with four poriferous canals, but bearing only two small setae in distal positions. Right paramere ( Fig. 14c View Figure 11-15 ) 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 View Figure 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.