Anillinus balli 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 : 208

Anillinus balli Sokolov and Carlton , new species

( Fig. 21 , Map fig. 38)

Holotype ( USNM). Male labeled / USA: KY, Laurel Co., Bald Rock Picnic Area , Hardwood berlese, 4.IV.1991, C.E.Carlton / LSAM0017691 / HOLOTYPE, Anillinus balli Sokolov and Carlton , des. 2003/.

Paratypes ( LSAM). One male with the same locality data as the holotype .

Specific Epithet. This species is named after George Ball (University of Alberta, Edmonton, AB) in honor of his contributions to the systematics of carabid beetles.

Description. Medium-sized for genus (ABL range, 1.69–1.74 mm; mean, 1.71 mm, n ¼ 2). Habitus moderately convex, ovoid (WE/ABL, 0.41) with head relatively narrow for genus (WH/ WPm, 0.71) pronotum relatively narrow compared to elytra (WPm/WE, 0.79). Color of body brunneous, appendages testaceous. Dorsal microsculpture distinct across 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 much wider than between anterior angles (WPa/WPp, 0.91).

Elytra moderately convex, depressed along suture, of normal length for genus (LE/ABL, 0.59), with traces of 2–3 interneurs. Humeri moderately prominent, slightly rounded. Vestiture of elytra relatively short (less than one-fourth the length of discal setae).

Males with metafemora simple.

Females unknown.

Median lobe ( Fig. 21 ) nearly rectangular arcuate, with enlarged angulate apex. Internal sac with copulatory pieces relatively small, of a pair of curved dorsal sclerites that form a tiny blade-like structure in apical part of median lobe; ventral sclerite and spines of internal sac absent.

Distribution. Known only from the type locality in Laurel Co., Kentucky ( Fig. 38).

Habitat. Specimens were collected from a Berlese sample of hardwood litter.

Differential Diagnosis. Anillinus balli is ovoid in form with distinct microsculpture on 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.

This species is allopatric with respect to other described species of Anillinus . From its geographically closest congeners it differs by the features mentioned in the key.

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.