Anillinus langdoni Sokolov and Carlton

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 : 215-217

Anillinus langdoni Sokolov and Carlton , new species

( Fig. 29 , Map fig. 43)

Holotype ( USNM). Male labeled / USA: TN, Sevier Co., GSMNP, Laurel Falls Trail , 838359360W 358409 190N/ elv. 747 m, leaf litter berlese, 1 July 2001, C.Carlton, V. Moseley, A.Tishechkin/ LSAM0003244 / HOLOTYPE, Anillinus langdoni Sokolov and Carlton , des. 2003/.

Paratypes (61). Nine males with the same collection data labels as holotype ( GRSM). One specimen labeled / USA: TN : Blount Co., Great Smoky Mt.N.P., S. of entrance, elv. 3,0809, leaf/log litter, 1. VI .1991, C.E. Carlton / ( LSAM); 2 males and 1 female labeled / USA: TN : Cocke Co., GSMNP, Gabes Mountain Trail at Hen Wallow Falls , UTM 297649 E 3959487 N, moist forest berlese C.Carlton, N. Lowe 19 July 2002 / ( GRSM); 3 females labeled / USA, TN , Cocke Co., GSMNP, Cosby Creek / Lot # 77-58, 18 June 1977, Berlesate, R . Chenowith / ( LSAM); 2 males and 1 female labeled / USA, TN , Sevier Co., GSMNP, Ramsey Cascade Trail (middle), 838189240W 358429340N/ elv. 1,300 m, forest litter berlese, 21 March 2002, C.E.Carlton, V . L. Moseley / ( GRSM); 3 males and 1 female labeled / USA, TN , Sevier Co., GSMNP, Porters Crk. Trail , 838239520W 358409130N/ elv. 870 m, 18 Oct 2001, A.Tishechkin, A.Cline / ( GRSM); 3 males and 11 females labeled / USA: TN , Monroe Co., Indian Boundary Campground, 29. V .1991/ ( LSAM); 5 males and 3 females labeled / TN: Sevier Co., GSMNP, Porter’s Creek Trail 9617, El. 738 m, 18–19 June 1996, Coyle, Brooks, Aiken, Davis / ( LSAM); 1 male and 1 female labeled / TN, Sevier Co., GSMNP, Porter’s Creek Trail 9731, Elev. 2,4209, 31 July 1997, Coyle, Brooks, Aiken, Davis / ( LSAM); 2 males and 2 females labeled / Tennessee: Sevier Co., GSMNP, Porters Crk., 2 nd Growth Cove Hardwood Upward Bound–Lambda Epsilon : Beetle Blitz. 30 Jun 2001, Ground sample/ ( LSAM); 1 male and 2 females labeled / USA, TN , Sevier Co., GSMNP, Chimneys Picnic Area Nature Trail, 838299450W 358389060N, elv. 891 m / forest litter berlese, 30 June 2001, C.Carlton, A.Tishechkin, V . Moseley / ( LSAM); 3 males and 4 females labeled / USA: TN : Sevier Co., GSMNP, Roaring Fork area, Rainbow Falls Trail, UTM 275540 E 3949710 N, moist cave berlese C. Carlton 1 Aug 2002 / ( LSAM) .

Additional Material (36, LSAM). 3 specimens labeled / USA: TN , Blount Co., GSMNP, Cades Cove , 838469310W, 358359590N/ elv. 625 m, forest litter berlese, 22 March 2002, CE. Carlton, VL. Moseley /; 1 specimen labeled / USA: TN , Blount Co., GSMNP, Gregory Ridge Trail , 838509060W 358329250N/ elv. 900 m, forest litter berlese, 22 March 2002, CE. Carlton, VL. Moseley /; 32 specimens labeled/ Tennessee: Sevier Co., GSMNP, Porters Creek Tr., sift.litter near rotten logs, Beetle Blitz-2003, 18 July 2003, S.O’Keefe /.

Specific Epithet. The specific epithet honors Keith Langdon, Coordinator of Inventory and Monitoring at Great Smoky Mountain National Park, and an active advocate of the ATBI in GSMNP.

Description. Small to medium-sized for genus (ABL range, 1.41–1.75 mm; mean, 1.59 mm, n ¼ 20). Habitus markedly convex, ovoid (WE/ABL, 0.40), head normally proportioned for genus (WH/WPm, 0.74), pronotum narrow compared to elytra (WPm/WE, 0.77). Body color various, from dark brunneous to brunneorufous, appendages testaceous. Microsculpture distinct across dorsal surface of head and pronotum.

Pronotum moderately convex and transverse (WPm/LP, 1.30), with margins rectilinear and slightly constricted posteriad (WPm/WPp, 1.25). Anterior angles evident, slightly prominent. Posterior angles slightly obtuse (105–1158). Width between posterior angles greater than between anterior angles (WPa/WPp, 0.94).

Elytra markedly convex, slightly depressed along the suture, of normal length for genus (LE/ ABL, 0.58), with traces of 1–2 interneurs. Humeri moderately prominent, slightly rounded. Vestiture of elytra short (less than one-fourth the length of the discal setae).

Males with metafemora simple.

Median lobe ( Fig. 29 ) evenly arcuate, with simple rounded apex. Internal sac with copulatory pieces of markedly curved dorsal sclerites, blade-like in form with peculiar prominences at base; ventral sclerite and spines of internal sac absent.

Distribution. Known from the northwest ranges of the Great Smoky Mountains in Cocke, Monroe, and Sevier Counties of Tennessee ( Fig. 43 ).

Habitat. Beetles were collected in the litter of hardwood forests at low to middle altitudes of the Smoky Mountains (700–1,300 m).

Differential Diagnosis. Anillinus langdoni is ovoid in form with distinct microsculpture on the forebody ( Table 2, group I of litter species). It is distinguished from all

other species in this group (for which males are known) by the form of the median lobe and armature of the internal sac.

Anillinus langdoni occurs sympatrically with at least three species of Anillinus and two species of Serranillus . From all Serranillus species (besides the other differences mentioned in genus key) and two ( A. barri and A. moseleyae ) of the three sympatric Anillinus species it differs by its distinct microsculpture on the pronotum. From A. loweae , described below, it differs in the distribution of microsculpture of the head (distinct and covering all frons and vertex), and by its smaller size and greater width across the posterior angles of the pronotum.

Figures

Figs. 25–31. Aedeagi of Anillinus spp., right lateral aspects, scale ¼ 0.1 mm. 25) A. docwatsoni n. sp.; 26) A. erwini n.sp.; 27) A. folkertsi n.sp.; 28) A. kovariki n.sp.; 29) Anillinus langdoni n.sp.; 30) A. lescheni n. sp.; 31) A. loweae n.sp.

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