Daimothoracodes rugomarginatus Ocampo

Ocampo, Federico C., 2005, A new species of the Neotropical genus Daimothoracodes Petrovitz (Coleoptera: Scarabaeoidea: Hybosoridae), Zootaxa 1048, pp. 45-51 : 46-49

Daimothoracodes rugomarginatus Ocampo , new species.

( Figs. 1–6 )

Type series. Holotype (male) at CNCI labeled “ BRAZIL, Distrito / Estacao Florestal / Cabeca do Veado, 1100 m. / 2327 Oct 1971 / E. G., I. and & E. A. Munroe.”; “ Daimothoracodes rugomarginatus / Ocampo / HOLOTYPE ” (red holotype label); genetalia dissected and preserved in glycerin in a micro­vial pinned with the specimen. Allotype, female, at CNCI with same label as holotype except: “ Daimothoracodes rugomarginatus / Ocampo / ALLOTYPE.” One paratype, male CMNC with same data as primary type except: “ 17–18 Oct 1971 ”; “ Daimothoracodes rugomarginatus / Ocampo / PARATYPE ” (yellow paratype label).

Holotype. Male. Length 5.8 mm; greatest width 2.6 mm. Color: Testaceous. Head ( Fig. 1 ): Frons subrectangular, surface smooth, sparsely setose, setae minute. Eye canthus subtriangular. Eyes not visible in dorsal view, totally covered by pronotum when head retracted. Frontoclypeal suture obsolete. Clypeus sparsely setose; margins rounded, reflexed except in middle, crenulate; vertical face of apex blunt, with sparse, long, slender setae. Labrum reduced, 0.46 times as long as clypeus, 0.55 times as wide as clypeus, mesally slightly indented; lateral margin rounded. Mandibles protruding beyond labrum, external surface smooth; with small, dorsal, preapical tooth and acute apical tooth. Labium with surface of mentum smooth and with long, slender setae; apex slightly indented. Antenna 10­segmented; scape subequal in length to segments 27, strongly notched, with long slender setae on dorsal surface; segment 2 globose; segments 37 wider than long; club 3­segmented, rounded, basal segment slightly cupuliform, partially receiving segment 2. Pronotum ( Fig. 1 ): Convex, 0.75 times as long as wide, surface smooth between foveae, glabrous; anterior margin straight, right­angled behind eye, with short, sparse setae; lateral margin strongly produced at middle; posterior border (each side of middle) emarginate; posterior border at middle posteriorly produced, subtriangular. Disc with 19 deep, large rounded or oval foveae; foveae variable in shape, size, and depth, but deeper, larger and more rounded on disc. Anterior angle acutely rounded. Scutellum: Surface smooth, glabrous, subtriangular. Elytron ( Fig. 2 ): Elongate, convex, 1.45 times as long as wide; sparsely setose, setae arranged in longitudinal series from base to apex; with 6 carinate striae, and 2 laterad of humerus; striae not reaching elytral apex; lateral margins distinctly, transversally rugose. Epipleuron not developed. Ve n t e r: Prosternal surface finely rugose, biconcave; with well­developed keel in middle; prosternal shield with posteriomedial process well­developed, pointed. Mesosternal surface smooth, posteriorly depressed; posterior process spine­like. Metasternal surface smooth, sparsely setose. Legs: Procoxa large, 0.66 times as long as profemur, anteriorly globose. Trochanters and femora sparsely setose, setae long. Protibial dorsal surface with longitudinal line of setae at middle and at margin (setae long, sparse); ventral surface with long, sparse setae; with 2 teeth in apical half; apical tooth large, 0.5 times as long as tibia, curved; basal tooth 1/3 as long as apical tooth; spur long, as long as apical tooth, curved, apex rounded ( Fig. 3 ). Protarsus with protarsomere 1 as long as 23 combined; protarsomere 24 longer than wide; 5th protarsomere 1.5 times longer than protarsomere 4. Pro­, meso­, and metatarsal claws shorter than tarsomeres 5, simple, curved. Meso­ and metatibiae profoundly, laterally flattened, sparsely setose; setae long, slender. Meso­ and metatibial medial spurs longer than tarsomere 1; mesotibial external spur reduced, 0.3 times as long as medial spur, apex rounded; metatibial external spurs longer than tarsomere 1. Spurs semicircular in cross section. Meso­ and metatarsomeres 1 longer than 2, meso­ and metatarsomeres 25 subequal in length. Parameres: Figs. 4, 5 .

Allotype. Female. Length 5.8 mm; greatest width 2.8 mm. The female allotype is similar to the male holotype except for presence of 22 pronotal foveae; protibial spur evenly curved; and mesotibia with 2 spurs well developed and sub equal en length.

Paratype. Length 5.6 mm; greatest width 2.9 mm, similar to the holotype.

Etymology. The specific epithet is a combination of Latin noun ruga, ae, f (a crease in the face, a wrinkle) and adjective marginatus, a, um (that of an edge, brink, border, margin). It refers to the rugose surface of the elytral margins.

Distribution ( Fig. 6 ). This species is known only from the type locality Distrito Federal, Estação Florestal Cabeça do Veado, Brazil, located at 1100 m in altitude.

Diagnosis. This species is distinguished from other species in the genus Daimothoracodes by the large, deep rugose surface of the lateral margin of elytra; the well developed carinate striae on elytral disc; and the protibiae with two well developed teeth. The shape of the parameres is also diagnostic ( Figs. 4, 5 ).

Figures

FIGURE 6. Distribution map of Daimothoracodes species.

FIGURES 1 – 5. Daimothoracodes rugomarginatus Ocampo, new species. 1 — Lateral view of head and pronotum; 2 — lateral view of elytron; 3 — dorsal view of right protibia; and 4 – 5 — dorsal and lateral view of male parameres.