Anillinus docwatsoni 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 : 212

Anillinus docwatsoni Sokolov and Carlton , new species

( Fig. 25 , Map fig. 42)

Holotype ( NCSU). Male labeled / USA, NC Rutherford Co., Chimney Rock, 15 Sept 1996, J. F. Cornell, Broad R. flood debris / HOLOTYPE, Anillinus docwatsoni Sokolov and Carlton , des. 2004/.

Paratypes (5, JFC). Five females, same data as holotype .

Specific Epithet. The species is named after Arthel ‘‘Doc’’ Watson, legendary bluegrass musician from North Carolina.

Description. Medium-sized for genus (ABL range, 1.81–2.08 mm; mean 1.90 mm, n ¼ 6). Habitus markedly convex, ovoid (WE/ABL, 0.39), head of moderate size (WH/WPm, 0.73), elytra relatively wide (WPm/WE, 0.80). Color of body brunneorufous, appendages testaceous. Head with microsculpture evident across frons and vertex except in paramedian areas of vertex, where it is indistinct. Dorsal microsculpture distinct across most pronotum; indistinct along midline.

Pronotum moderately convex and transverse (WPm/LP, 1.39), with margins moderately and rectilinear convergent towards base (WPm/WPp, 1.33). Anterior angles evident, slightly prominent. Posterior angles slightly obtuse (100–1108). Width between posterior angles equal to width between anterior angles (WPa/WPp, 1.00).

Elytra markedly convex, slightly depressed along suture, length normal for genus (LE/ABL, 0.56), with traces of 1–2 interneurs. Humeri moderately prominent, slightly rounded. Vestiture of elytra short (less than one-quarter length of discal setae).

Males with metafemora simple.

Median lobe ( Fig. 25 ) evenly arcuate with simple narrowly rounded apex. Internal sac with dorsal copulatory sclerite weakly sinuate then twisted and curved ventrally in apical one-third; ventral sclerite diverging from base of dorsal sclerite, overlapping it basally, then curved ventrally. Internal sac ventral to sclerites bearing dense rows of fine triangular spines.

Distribution. This species is known from a single locality in Rutherford County, NC ( Fig. 42 ).

Habitat. The type series was collected in flood debris along the Broad River .

Differential Diagnosis. Anillinus docwatsoni is ovoid in form with microsculpture on the forebody except paramedian patches of vertex ( Table 2, group II of litter species), though in this last regard the microsculptured areas are slightly more extensive than in other members of the group. In addition, it may be distinguished from all other species in this group (for which males are known) by the form of the copulatory sclerites and armature of the internal sac.

This species is apparently allopatric with respect to other described species of Anillinus , though several species occur nearby, and it is likely sympatric with at least one species of Serranillus . From A. cornelli and A. murrayae , known from localities to the southeast and west, respectively, it differs by the presence of microsculpture across most of the disc of the pronotum and head, and by the distinctive aedeagus. The main dorsal copulatory sclerite is similar to that of A. loweae and A. fortis , but these two species lack the secondary ventral copulatory sclerite and the distinctive spine arrangement of the internal sac ventral to the sclerites. Also, A. docwatsoni lacks the distinctive subapical patch of spines on the internal sac of A. loweae .

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. 42. Locality records for Anillinus spp. occurring within North and South Carolina, with the French Broad River indicated.