Anillinus folkertsi 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 : 214

Anillinus folkertsi Sokolov and Carlton , new species

( Fig. 27 , Map fig. 39)

Holotype ( USNM). Male labeled /ALA, Monroe County, 1 mi S Claiborne Dam, 318 359300N 878 329210 W, 31.V.1995 C.E.Carlton / Beech / Magnolia riparian berlese / William H. Cross Expedition 1995/ LSAM0017115 / HOLOTYPE, Anillinus folkertsi Sokolov and Carlton , des. 2003/.

Paratypes (5, LSAM). Three males and 2 females with same data as holotype .

Specific Epithet. This species is named after George Folkerts (Auburn University, Auburn, AL), natural historian extraordinaire for the state of Alabama.

Description. Medium-sized for genus (ABL range, 1.59–1.85 mm; mean, 1.77 mm, n ¼ 6). Habitus moderately convex, ovoid (WE/ABL, 0.40) head normal in size (WH/WPm, 0.74) pronotum relatively narrow compared to elytra (WPm/WE, 0.78). Color of body various, from brunneous to brunneorufous, appendages testaceous. Dorsal microsculpture distinct across head and pronotum.

Pronotum moderately convex, markedly transverse (WPm/LP, 1.35), with margins rectilinear and slightly constricted posteriad (WPm/WPp, 1.23). Anterior angles evident, slightly prominent. Posterior angles slightly obtuse (105–1158). Width between posterior angles much greater than between anterior angles (WPa/WPp, 0.92).

Elytra moderately convex, moderately depressed along suture, of normal length (LE/ABL, 0.59), with traces of 4–5 interneurs. Humeri moderately prominent, slightly rounded. Vestiture of elytra relatively short (less than one-fourth length of discal setae).

Males with metafemora simple.

Median lobe ( Fig. 27 ) evenly arcuate, with enlarged apex acute at middle where outermost membraneous part of sac wall is attached. Thus, apical ostium divides apex into ventral and dorsal portions and reaches the aedeagal apex. Internal sac with copulatory pieces of both dorsal and ventral sclerites. Dorsal sclerites in form of a filament-like structure, which is relatively short and does not extend beyond internal sac. Ventral sclerite in form of 3-pronged curved plate. Spines of internal sac absent.

Distribution. Known from the type locality in the ‘‘Red Hills’’ area of Monroe Co., Alabama ( Fig. 39).

Habitat. Specimens were collected from a Berlese sample taken in a riparian forest near the Alabama River. This sample also yielded an undescribed species of the pselaphine staphylinid genus Arianops . Other unique faunal elements found in the Red Hills area include the plesiotypic gyrinid Spanglergyrus albiventris Folkerts ( Folkerts 1979) and the endemic salamander Phaeognathus hubrichti Highton ( Highton 1961) .

Differential Diagnosis. Anillinus folkertsi is a member of ovoid species with completely developed 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 and armature of the internal sac.

This species is allopatric with respect to other described species of Anillinus , and is quite isolated from the nearest populations of other species. From its geographically closest congeners it differs by the presence of the 4–5 interneurs on the elytra and by the features mentioned in the key.

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.