Paratractosomus sulciventris, Casari, Sônia A., 2013

Casari, Sônia A., 2013, New genera of Dicrepidiina from the Neotropical Region (Coleoptera, Elateridae, Elaterinae, Ampedini), Zootaxa 3721 (2), pp. 143-156 : 148-153

Paratractosomus sulciventris sp. nov.

( Figs 23–40, 45– 48)

Type material. Holotype. BOLIVIA. Santa Cruz: 4 Km N Bermejo 1000m, 16–21 October 2007, J. Wappes & A. Cline; Ref. Los Volcanes 18 o 06’S 63 o 36 ’W (MNKM).

Paratypes. BOLIVIA. Santa Cruz: Florida 4 Km N Bermejo, 25–29 October, 2011, Wappes & Skillman; Refugio los Volcanes 18 o 06’S 63 o 36 ’W, 1000–1200 m (dissected) (MZSP); 4 Km N of Bermejo Ref. los Volcanes 1350 m, 8–11 December, 2011, 18 o 06’S 63 o 36 ’W, Wappes, Lingafelter, Morris & Woodley; 2012 Loan ACMT, J. Wappes 2 exs (ACMT, MNKM); Florida, 4 Km N Bermejo, 29.X. 2011 coll. Skillman & Wappes; Refugio los Volcanes 18 o 06’S 63 o 36 ’W, 1000–1200 meters (FWFC); Florida 4 Km N Bermejo, 29.X. 2011, Coll. Skillman & Wappes; Refugio los Volcanes, 18 o 06’S 63 o 36 ’W, 1000–1200 meters; FWSC loan Feb. 2012 (MZSP).

Length: 12.5 mm (holotype); 10–13 mm (paratypes).

Integument very shiny ( Figs 45–48). Coloration reddish-brown with head black and elytra yellowish-brown; antennae brownish; elytra marginate by reddish-brown portion. Pubescence white, long and sparse on head and ventrally (including legs); pronotum glabrous; elytra with setae only at lateral margins; antennae with goldenyellow setae, very dense and short, some very long; last ventrite more densely setose in female.

Frons ( Figs 24, 45–47) wider than long; convex; concave in a small area parallel to anterior margin; anterior margin slightly rounded, strongly carinate, surpassing frontoclypeal region; punctation moderately coarse and sparse. Antenna ( Figs 23, 46) reaching hind angles of pronotum in both sexes; in male surpassing hind angles of pronotum by about one antennomere; serrate with 11 antennomeres; 3 rd antennomere elongate, shorter than 4 th. Labrum ( Fig. 34) transverse, prominent medioanteriorly; many long setae of varied sizes distributed on two anterior thirds and some short setae near base. Mandibles ( Figs 36–39) robust, slightly asymmetrical; in all specimens examined distal tooth more sharpened at right mandible; raised and with longitudinal sinuous carina dorsomedially; many long laterodorsal setae; molar area well developed covered by piliform setae. Maxilla ( Fig. 40): cardo constricted at apex with some long setae at basal half; basistipes elongate, subtriangular with long setae on basal two thirds; medistipes transversely emarginated at base; with longitudinal carina parallel basistipes; long setae externally carina, forming irregular longitudinal row near basistipes; tiny setae irregularly distributed on wide area at other side of carina; galea and lacinia brush-like; galea more developed with spatulate setae. Palpiger setose; palpus setose and with four palpomeres: palpomere basal short, as wide as long; two median palpomeres elongate and widened near apex; palpomere distal securiform. Labium ( Fig. 35): postmentum wider than long, slightly trapezoidal with setae of varied sizes, one pair longest; prementum with long setae near middle arranged in an irregular row. Palpiger with many short setae; palpus setose with three palpomeres: palpomere basal short, almost transverse; palpomeres median and distal elongate and widened apicad.

Pronotum ( Figs 24, 25, 45, 46) slightly wider than long (including hind angles), strongly narrowed anteriorly and slightly narrowed at base of hind angles, making lateral margins slightly sinuous; strongly convex; lateral carina ( Figs 25, 46, 47) almost reaching anterior margin, partially visible dorsally; hind angles long, divergent and weakly carinate; punctation moderately fine, weak and sparse, more visible anteriorly. Hypomeron ( Figs 25, 46, 47) with punctation moderately fine and sparse. Pronotosternal sutures ( Figs 25, 47) wide and open frontally forming a well developed prosternal groove. Punctation of prosternum ( Figs 46, 47) sparse, coarser than that of hypomera. Prosternal spine ( Figs 25, 26, 47) flattened from between procoxae to apex; compressed laterally, widened apicad; apex irregularly emarginated forming two lobes: dorsal lobe larger and rounded and ventral lobe sharpened. Mesosternal cavity ( Figs 26, 27, 47, 48) wide, U-shaped with borders moderately wide and horizontal on basal half and declivous at anterior half. Mesepisternum ( Figs 27, 47, 48) not forming part of margin of mesocoxal cavity. Metasternum ( Figs 47, 48) with a deep boomerang-like furrow, bordered anteriorly by carina, behind mesosternal cavity. Metacoxal plate ( Figs 27, 47, 48) slightly narrowed laterally with well developed tooth at free margin. Tibial spurs present. Tarsomeres 1–3 ( Figs 46–48) with well developed lamella beneath; lamellae increasing in size apically. Scutellum elongate, pentagonal and declivous anteriorly; distal margin rounded. Elytra ( Figs 45, 46) smooth, wider than pronotum on basal half (except basal margin), gradually narrowed on distal half; apex narrow with tiny sutural spine; striae marked by row of rounded translucent punctures.

Male. Tergite VIII ( Fig. 30) longer than wide, slightly narrowed apicad; distal margin rounded; translucent in median basal area; marginate by long setae on distal ¾. Sternite VIII ( Fig. 28) wider than long, slightly narrowed apicad; distal margin emarginated at middle forming a wide rounded lobe each side; translucent with wide lateral and anterior yellowish bands (interrupted medioanteriorly) united to narrow transverse band near base; long setae near anterior and lateral margins. Sternite IX ( Fig. 29) elongate, widened near middle; distal half slightly narrowed apicad; apex rounded; long setae on distal half. Tergite IX ( Fig. 31) slightly wider than long, slightly narrowed apicad; densely punctate laterally; distal margin gradual and deeply emarginate at middle; long lateral setae near fore angles. Tergite X elongate, widened near middle; punctate; long setae near margins of distal half. Aedeagus ( Figs 32, 33) narrow, 3.6 times longer than wide; basal piece long, 0.73 times paramere length (dorsally); parameres wider on basal third, with apex cuneiform; subapical region with setae of varied sizes dorsal and ventral; some dorsal setae very long; median lobe (excluding basal struts) 0.85 times paramere (dorsally) length; narrow, gradual- and slightly narrowed apicad; subapical region constricted.

Etymology. The specific epithet is a derivative of the Latin words sulci (=furrow) + ventris (=venter), referring to the furrow on the metasternum.