Oxychalepus angulatus Staines, 2010

Staines, C. L., 2010, A review of the genus Oxychalepus Uhmann, 1937 (Coleoptera: Chrysomelidae: Cassidinae), Zootaxa 2573 (1), pp. 35-56 : 40-41

Oxychalepus angulatus Staines New Species

( Figure 3 )

Holotype (♂): Bolivia, Dpt. Santa Cruz, Pua. Ichilo, Buena Vista , x.1949, coll. Martinez / F. Monros Collection / Holotype Oxychalepus angulatus Staines (red label) ( USNM) . Paratypes (12, all with Paratype Oxychalepus angulatus Staines (red label)): 1- same label data as holotype ( USNM) ; 1-. Bolivia, Santa Cruz: Ichilo, Santa Cruz, Hotel Flora y Fauna , 4 km SSE Buena Vista, 400–500 m, 3–14.xi.2003 ( USNM) ; 3- Bolivia, Santa Cruz, 5 km SSE Buena Vista, Hotel Flora and Fauna , 440 m, W63º39.128’ S17º29.925’, 10– 22.X.2004, J. E. Eger ( FSCA) ; 3- Bolivia, Santa Cruz, 3.7 km SSE Buena Vista, Hotel Flora and Fauna , 430 m / 14-28-X-2000, B. K. Dozier collector ( FSCA) ; 2- Bolivia, Santa Cruz, 3.7 km SSE Buena Vista, Hotel Flora and Fauna , 14-19-X-2000, M. C. Thomas, tropical transition forest ( FSCA) ; 1- Bolivia, Santa Cruz, Portreillos del Guendá , 40 km NW Santa Cruz de la Sierra, blacklight, 17º40.26’S 63º27.44’W, 5-20-XI-2004, B. K. Dozier ( FSCA) ; 1- Argentina. Misiones : San Ignaci / Argentina 1968, J. Daguerre coll. ( USNM) .

Description. Head, antennae, scutellum, and legs (except base of femora) black; pronotum and elytra orangish-yellow with black markings; venter yellowish medially, black laterally, abdominal sterna 4–5 totally black. Head: vertex trisulcate; medial carina present; clypeus punctate, not projecting. Antenna: reaching to humerus; antennomere 1 subglobose, 2x length of 2; 2 transverse; 3–5 cylindrical, 3 slightly longer than 4 or 5; 6–10 transverse, 11 longer than others; 11 acutely pointed at apex. Pronotum: obconic; widest at base; convex; lateral margin bisinuate, slightly angulate in middle; anterior angle with small tooth; posterior angle acute; transverse basal impression present; disc finely, sparsely punctate, with faint medial sulcus; sides strongly, more densely punctate; pronotal length 1.4–1.6 mm (n=13); pronotal width 2.1–2.3 mm. Scutellum: quadrate; alutaceous. Elytron: with 10 rows of punctures, scutellar row absent; lateral margin sparsely dentate on basal ½, then more strongly dentate; exterior apical angle rounded, with two large teeth; apical margin strongly dentate; sutural angle slightly emarginate; humerus angulate, slightly produced; intervals 2, 4, and 8 costate, costa 2 strongly produced basally; interval 6 costate at base and apex; elytral length 8.6–9.0 mm; elytral width 3.3–3.4 mm. Venter: prosternum smooth; meso- and metasterna smooth medially, punctate laterally; abdominal sterna with scattered punctures. Leg: femur and tibia punctate; tibia with row of setae on inner margin and at apex. Total length: 10.9–11.1 mm.

Etymology. From angulus (Latin= corner or angle) for the distinctly angulate lateral margin of the pronotum.

Remarks. This species can be distinguished by the elytra without a scutellar row and having costae 1 and 2 not united near the apex; by the vertex of the head being trisulcate; and by having antennomere 1 subglobose and 2 transverse.

Host plant. Unknown.

Distribution. Argentina and Bolivia.

Figures

FIGURES 1–4. Habitus of Oxychalepus species. 1. Oxychalepus alienus. 2. Oxychalepus anchora. 3. Oxychalepus angulatus. 4. Oxychalepus balyanus.