Anillinus unicoi 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 : 3-6

publication ID	https://doi.org/ 10.5281/zenodo.5160535
DOI	https://doi.org/10.5281/zenodo.5164449
persistent identifier	https://treatment.plazi.org/id/03FA87B0-FF9B-773E-A786-2E85FE9EF9F7
treatment provided by	Felipe
scientific name	Anillinus unicoi Sokolov
status	sp. nov.

Treatment

Anillinus unicoi Sokolov View in CoL , new species

Figure 1 View Figure 1-5 , 6 View Figure 6-10 , 11 View Figure 11-15 , 16 View Figure 16

Holotype. Male lacks left middle leg and is labeled /USA-NC: Graham Co., Cherokee NF, Cherohala Skyway , Stratton Meadows at 35°20.229’N 84°1.862’W, 1300m, litter berlese, Sokolov I.M. 19 Oct 2007 / Molecular Voucher # 51 Sokolov I. 2008 GoogleMaps / HOLOTYPE, Anillinus unicoi Sokolov , des. 2009/. The holotype is dissected and bears a plastic rectangle with genitalia mounted in dimethylhydantoin formaldehyde resin. Deposited U.S. National Museum ( USNM) .

Type locality. U.S.A. North Carolina, Graham County, Unicoi Mountains at 35°20.229’ N 84°1.862’ W.

Etymology. The name of this species is based on the name of the mountain region of where this species occurs.

Description. Large for the genus (ABL = 1.98 mm). Habitus ( Fig. 1 View Figure 1-5 ) subdepressed, subparallel (WE/ ABL 0.36), head of normal proportions for the genus (WH/WPm 0.72), pronotum narrow compared to elytra (WPm/WE 0.82). Body color rufotestaceous, appendages testaceous. Dorsal microsculpture partly effaced. Head with polygonal microsculpture on entire vertex and anterior part of frons with area of effaced microsculpture between them. Disc and front part of pronotum with effaced microsculpture, base of pronotum with polygonal microsculpture. Elytra with well-developed polygonal microsculpture.

Pronotum ( Fig. 6 View Figure 6-10 ) moderately convex and comparatively elongated (WPm/LP 1.23), with margins strongly constricted posteriad (WPm/WPp 1.45) and slightly sinuate before posterior angles. Anterior angles weak, very slightly prominent. Posterior angles nearly rectangular (95-100°). Width between posterior angles less than between anterior angles (WPa/WPp 1.10).

Elytra slightly convex, depressed along suture, of normal length for genus (LE/ABL 0.54), with traces of 5 interneurs. Humeri oblique and effaced. Lateral margins subparallel, slightly divergent in basal half, 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 male with moderately dilated tarsomere 1. Profemur moderately swollen. Metafemora unmodified. Sternum VII of males unmodified.

Median lobe of aedeagus ( Fig. 11a View Figure 11-15 ) evenly arcuate and twisted, with apex greatly enlarged, widely rounded and curved upwards. Distinctive small fold extending from base of apex towards its outer margin. Ventral margin of median lobe enlarged only in apical half, abruptly tapering towards base at the middle of median lobe. Enlarged apical part of ventral margin bears numerous poriferous canals, which are also present on walls of median lobe across its ventral side. Dorsal copulatory sclerites forming two curled blade-like structures of moderate length parallel to each other. Ventral sclerite and spines of internal sac absent. Membranous folds of internal sac at apical third of median lobe around ostium are covered with distinctive scale structures. Left paramere ( Fig. 11b View Figure 11-15 ) not enlarged, paramere apex with numerous poriferous canals, but without any visible setae. Right paramere ( Fig. 11c View Figure 11-15 ) greatly elongated, with slightly enlarging apical portion, bearing numerous (>20) long setae, which are approximately onehalf the length of the paramere.

Distribution. Known only from high altitudes (1300 m) in the central part of the Unicoi Mountains, Graham County, North Carolina ( Fig. 16 View Figure 16 ).

Habitat. A single male was collected by sifting litter under canopy of Rhododendron thickets on a flat forested area at the watershed of the ridge. The locality is situated in mixed pine-hardwood forest at relatively high altitude (1300 m).

Differential diagnosis. Anillinus unicoi belongs to the moseleyae-group of species (group VII, Sokolov et al. 2004), which is characterized by the smooth disc of pronotum, partly smooth head and by the narrow base of pronotum (WPa/WPp> 1.00). It is distinguished from all other species in this group by the form of the median lobe and armature of the internal sac. Externally, it is similar to A. moseleyae Sokolov and Carlton , and A. carltoni new species, described below. These differences are subtle, but the genitalia of all three species are distinctly different.

Anillinus unicoi occurs sympatrically with one species of Anillinus ( A. cherokee Sokolov and Carlton ) and, presumably, one or two species of Serranillus Barr. Externally , it can be distinguished from all species of Serranillus by the presence of long discal elytral setae. From A. cherokee it can be distinguished by the absence of microsculpture on the pronotum, elongated and subdepressed body form and shape of the pronotum.