Anillinus stephani 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 : 224-226

Anillinus stephani Sokolov and Carlton , new species

( Figs. 13, 17 , 36 , Map fig. 41)

Holotype ( FSCA). Male labeled / Oklahoma, Latimer Co., IV-1984, K.Stephan /

HOLOTYPE, Anillinus stephani Sokolov and Carlton , des. 2003/.

Paratypes (62). Six males and 7 females with same locality data as holotype ( FSCA, LSAM) . Two females labeled / Oklahoma, Latimer Co., 5 mi W. Red Oak , March 1981, K. Stephan / collected under rock/ ( TAMU) ; 1 male and 1 female labeled / Oklahoma, Latimer Co., -III-83, Karl Stephan / ( FSCA) ; 3 males and 3 females labeled / Oklahoma, Latimer Co., X-1984, K.Stephan / ( FSCA) ; 5 males labeled / Oklahoma, Latimer Co., II-1985, Karl Stephan / collected under rock / ( FSCA) ; 5 males and 6 females labeled / Oklahoma, Latimer Co., III-1985, Karl Stephan / collected under rock / ( FSCA) ; 4 males labeled / Oklahoma, Latimer Co., IV-1985, Karl Stephan / collected under rock / ( FSCA) ; 1 male labeled / Oklahoma, Latimer Co., IV-1987, Karl Stephan / ( FSCA) ; 1 male labeled / Oklahoma, Latimer Co., III-1988, Karl Stephan / ( FSCA) ; 1 female labeled / Oklahoma, Latimer Co., IV-1988, Karl Stephan / ( FSCA) ; 1 female labeled / Oklahoma, Latimer Co., V-1988, Karl Stephan / ( FSCA) ; 1 female labeled / Oklahoma, Latimer Co., X-1988, Karl Stephan / ( FSCA) ; 1 male and 2 females labeled / Oklahoma, Latimer Co., -III-91, Karl Stephan / ( TAMU) ; 1 female labeled / Oklahoma, Latimer Co., -IV-91, Karl Stephan / ( TAMU) ; 4 females labeled / Oklahoma, Latimer Co., -III-92, Karl Stephan / ( TAMU) ; 1 male and 1 female labeled / Oklahoma, Latimer Co., -IV-92, Karl Stephan / ( TAMU) ; 1 female labeled / Oklahoma, Latimer Co., -V-92, Karl Stephan / ( TAMU) .

Specific Epithet. This species is named for Karl Stephan (Red Oak, OK) in honor of his many beetle discoveries and his extraordinary documentation of the beetle fauna of Latimer County, Oklahoma.

Description. Small-sized for genus (ABL range, 1.39–1.60 mm; mean, 1.52 mm, n ¼ 20). Habitus subdepressed, elongate and subparallel (WE/ABL, 0.33) with large head (WH/WPm, 0.84) and narrow pronotum and elytra (WPm/WE, 0.86). Color of body various, from rufotestaceous to amber testaceous, appendages testaceous. Dorsal microsculpture distinct, covering pronotum and head except for small areas with indistinct microsculpture at anterior parts of frons between frontal carinae and frontal grooves.

Pronotum moderately convex, more elongate than in most species of the genus (WPm/LP, 1.27), with margins markedly constricted posteriad (WPm/WPp, 1.37) and slightly sinuate before posterior angles. Anterior angles evident, slightly prominent. Posterior angles nearly rectangular (95–1008). Width between anterior angles obviously greater than between posterior angles (WPa/ WPp, 1.11).

Elytra slightly convex, widely depressed along suture, relatively short (LE/ABL, 0.56), with traces 3–4 interneurs. Humeri prominent, only slightly rounded. Vestiture of elytra short (less than one-fourth length of discal setae).

Male metafemora ( Fig. 13) slender, weakly tuberculate along posterior margin; metatibiae ( Fig. 17 ) slender and simple.

Median lobe ( Fig. 36 ) elongate and enlarged in apical one-half, with enlarged, modified billshaped apex. Ventral surface of median lobe bearing an oblique row of pores, each pore bearing a long erect seta. Internal sac with copulatory pieces both dorsal and ventral sclerites. Dorsal sclerites arcuate, in form of a blade-like structure, with relatively wide base. Ventral sclerite in form of a small quadrately curved plate. Spines absent.

Distribution. Known from Latimer Co., Oklahoma ( Fig. 41). This species and its sympatric congener, A. lescheni , represent the western-most occurrence of the genus.

Habitat. Comments under A. lescheni above apply to this species as well.

Differential Diagnosis. Anillinus stephani is parallel-sided with distinct microsculpture on the forebody ( Table 2, group II of endogean species). This species is sympatric with A. lescheni , which shares the elongate habitus and distinct microsculpture. The row of unusual setigerous pores on the ventral surface of the median lobe separates this species from all other members of the genus for which males are known. It lacks the unusual tubercles of the metatibiae of A. lescheni and is smaller.

Anillinus tishechkini Sokolov and Carlton , new species ( Fig. 37 , Map fig. 41)

Holotype ( USNM). Male labeled / USA: AR: Perry Co., Winona Forest Dr., calc. 10 mi W L.Sylvia, litter among rocks, along crest of ridge 27 Nov 1995 C.E.Carlton /.

Paratypes (4, LSAM). One male and 3 females with same locality data as holotype .

Specific Epithet. This species is named for Alexey Tishechkin (Louisiana State Arthropod Museum, Baton Rouge, LA), who found these specimens in the unmounted specimen backlog and brought them to our attention.

Description. Small to medium-sized for genus (ABL range 1.53–1.66 mm; mean, 1.60 mm, n ¼ 5). Habitus subdepressed, elongate and subparallel (WE/ABL, 0.36), head moderate in size (WH/WPm, 0.78) pronotum and elytra narrow (WPm/WE, 0.81). Color of body rufotestaceous, appendages testaceous. Dorsal microsculpture distinct, extended over pronotum and head, except for small areas with indistinct microsculpture at anterior parts of frons between frontal carinae and frontal grooves and side areas of clypeus.

Pronotum moderately convex, moderately transverse (WPm/LP, 1.33), with margins rectilinear and markedly constricted posteriad (WPm/WPp, 1.36). Anterior angles evident, slightly prominent. Posterior angles slightly obtuse (100–1108). Width between posterior angles approximately the same as between anterior angles (WPa/WPp, 1.03). Width between anterior angles obviously greater than between posterior angles (WPa/WPp, 1.05).

Elytra slightly convex, widely depressed along suture, of normal length for genus (LE/ABL, 0.57), with traces of 3–4 interneurs. Humeri prominent, only slightly rounded. Vestiture of elytra short (less than one-fourth length of discal seta).

Males with metafemora simple.

Median lobe ( Fig. 41) evenly arcuate and enlarged in apical two-thirds, with simple apex. Right side of apical ostium in form of a wall, with a small protrusion and united at apex at some distance from dorsal margin. In dorsal view apex median lobe with obvious crevice on right side. Internal sac with copulatory pieces of both dorsal and ventral sclerites and two groups of spines. Dorsal sclerites markedly arcuate, distant from each other, especially at base. Ventral sclerite in form of a long, evenly enlarged narrow plate with few irregularities toward ostium. Spines occupy positions between dorsal and ventral sclerites near the left side of median lobe and above the middle of dorsal sclerites.

Distribution. Known only from the type locality in Perry Co, Arkansas ( Fig. 41) west of Lake Sylvia in the Ouachita National Forest.

Habitat. Habitat where the specimens were collected is rocky upland pine/ hardwood forest along a ridgetop having extensive sandstone outcrops and small bluffs.

Differential Diagnosis. Anillinus tishechkini is parallel-sided with distinct microsculpture on the forebody (group II of endogean species). The transverse pronotum, narrow head and the armature of the internal sac distinguishes that species from the similar A. stepheni , described above.

This species is allopatric with respect to other described species of Anillinus . From its geographically closest congeners it differs by its small size, by its depressed subparallel habitus, and by the reticulated pronotum, in addition to features mentioned in the key.

Figures

Figs. 14–17. Anillinus spp., right metatibiae, setae and spurs omitted. 14) A. elongatus Jeannel; 15) A. lescheni n. sp.; 16) A. fortis (Horn); 17) A. stephani n. sp.

Figs. 32–37. Aedeagi of Anillinus spp., right lateral aspects, scale ¼ 0.1 mm. 32) A. magazinensis n.sp.; 33) A. moseleyae n.sp.; 34) Anillinus murrayae n.sp.; 35) A. robisoni n. sp.; 36) A. stephani n. sp.; 37) A. tishechkini n. sp.