Anillinus steevesi Barr, 1995

Sokolov, Igor M., Carlton, Christopher & Cornell, James F., 2004, Review of Anillinus, with Descriptions of 17 New Species and a Key to Soil and Litter Species (Coleoptera: Carabidae: Trechinae: Bembidiini), The Coleopterists Bulletin 58 (2), pp. 185-233 : 204-205

Anillinus steevesi Barr

( Fig. 20 , Map figs. 41, 43)

Anillinus steevesi Barr, 1995:243 . Holotype male from ‘‘ Cloudland Canyon State Park , Dade County, Georgia.’’ Deposited Carnegie Museum of Natural History, Pittsburgh, PA.

Type not examined. We have at hand a series of specimens from Tennessee and North Carolina that were identified by us as A. steevesi . Identification was based on comparison of main aedeagal features of the dissected males (overall form of median lobe, finger-like projection on apex, filament-shape of the inner sclerite and the presence of ventrolateral setae on the outer wall of median lobe) with the drawing accompanying the description of the species ( Barr 1995). The following description of A. steevesi is based on those specimens.

Description. Medium sized for genus (ABL range, 1.67–1.98 mm; mean 1.84 mm, n ¼ 8). Habitus markedly convex, ovoid (WE/ABL, 0.39), head of moderate size (WH/WPm, 0.73), elytra relatively wide (WPm/WE, 0.79). Color of body various from brunneorufous to rufous, appendages testaceous. Microsculpture on head absent from two confluent paralateral patches at vertex, otherwise distinct over all surface. Pronotal microsculpture distinct across surface of disc.

Pronotum moderately convex and transverse (WPm/LP, 1.29), with margins only slightly (WPm/WPp, 1.24) rectilinear convergent posteriad. Anterior angles evident, slightly prominent. Posterior angles slightly obtuse (105–1158). Width between posterior angles much wider than between anterior angles (WPa/WPp, 0.90).

Elytra markedly convex, slightly depressed along suture, relatively long for genus (LE/ABL, 0.60), with traces of 2–3 (occasionally 4) interneurs. Humeri moderately prominent, slightly rounded. Vestiture of elytra short (less than one-fourth length of discal seta).

Males with metafemora simple.

Median lobe ( Fig. 20 ) evenly arcuate and twisted, with an obvious round invagination on the right ventrolateral side just behind the apex. Apex ventrally with a finger-like projection. Internal sac with copulatory pieces of dorsal sclerites, which form a long, filament-like structure, extending beyond internal sac; ventral sclerite and spines of internal sac absent. Ventral surface of median lobe with several conspicuous setae.

Material Examined (27, LSAM unless indicated otherwise). Nine specimens labeled / USA: TN, Blount Co., Foothills Pkwy. , Look Rock Campgr., berlesate betwn. rocks, 31. V .1991, C.E.Carlton/; 1 specimen labeled / Tennessee: Blount Co.: GSMNP, Lynn Hollow, burned, Sample 1, Upward Bound , Gamma Chi , Beetle Blitz , 30 June 2001 /; 5 specimens labeled / USA: TN : Blount Co., GSMNP, Cades Cove ,; 1 mi N Methodist Church, 368369410N, 838469600W, 610 m, forest litter, 17 July 2003, A.Tishechkin / ( GRSM) ; 4 specimens labeled / USA: TN : Blount Co., GSMNP, NE corner of Cades Cove at 368369330N, 838479120W, 640 m, forest litter, 17 July 2003, A.Tishechkin / ( GRSM) ; 7 specimens labeled / USA: NC : Swain Co., GSMNP, Hazel Creek Trail at 368289270N, 838429270W, 600 m, forest litter, 18 July 2003, A.Tishechkin /; 1 specimen labeled / USA: NC : Swain Co., GSMNP, Lakeshore Trail at 368289200N, 838439140W, 630 m, forest litter, 18 July 2003, A.Tishechkin /.

Distribution ( Figs. 41, 43 ). Known from western part of Great Smoky Mountains National Park to at least Cloudland Canyon State Park, Georgia (type locality).

Habitat. Specimens have been taken in Berlese samples among rocks.

Differential Diagnosis. Anillinus steevesi belongs to ovoid species with areas lacking microsculpture on the head (group II of litter species). It can be distinguished from all other species in this group by the form of the median lobe.

This species is narrowly sympatric with A. langdoni in the western part of the Smoky Mountains and separated from nearest populations of A. loweae by only about 20 km ( Fig. 43 ). From its closest congeners it differs by the features mentioned in the key with the exception of A. loweae . Externally, A. steevesi is similar to A. loweae , but they may be distinguished easily by the form of median lobe and by the armature of the internal sac.

Figures

Figs. 18–24. Aedeagi of Anillinus spp., right lateral aspects, scale ¼ 0.1 mm. 18) A. elongatus Jeannel; 19) A. fortis (Horn); 20) A. steevesi Barr; 21) A. balli n. sp.; 22) A. barri n. sp.; 23) A. cornelli n. sp.; 24) A. daggyi n. sp.

Fig. 43. Locality records for Anillinus spp. occurring within Great Smoky Mountain National Park.