Oxychalepus opacicollis Ramos 1998

Staines, C. L., 2010, A review of the genus Oxychalepus Uhmann, 1937 (Coleoptera: Chrysomelidae: Cassidinae), Zootaxa 2573 (1), pp. 35-56 : 49

Oxychalepus opacicollis Ramos 1998

( Figure 11 )

Oxychalepus opacicollis Ramos 1998: 313 [Holotype: Brazil, Alto Amazonas, Benjamim Constant (Rio Javari), Dirings, Nov 1962 / HOLOTYPE [red label]/ an 11/ Oxychalepus confinis Ws. B. Pohl det. 1964/ Oxychalepus opacicollis n. sp. Holotipo ♂ T. C. Ramos det. 1996 (MZUP)].

Description. Pronotum orangish with medial stripe and lateral margins black; elytra with apical ¼ black and basal anchor-shaped black markings; venter black with orangish markings; pro-, meso-, and metasterna, and abdominal sterna 1–2 yellowish medially, black laterally; abdominal sterna 3–8 black; base of femora orange. Head: vertex with medial sulcus and sulcus on inner margin of each eye, frontal carina straight; clypeus with globose elevations. Antenna: reaching to humeri; slightly compressed laterally; antennomere 1 large, subglobose; 2 transverse, small; 3–4 cylindrical, elongate; 5 cylindrical shorter than 4; 6–10 transverse; 11 pointed at apex; 1–2 with scatter setae; 3–7 sulcate; 8–11 setose. Pronotum: obconic, convex; lateral margin slightly sinuate at base and apex; anterior angle with rounded tooth; punctures shallow, absent on disc; transverse basal impression distinct; with faint medial longitudinal sulcus; pronotal length 0.9–1.1 mm (n=7); pronotal width 1.4–1.7 mm. Scutellum: longer than wide; alutaceous. Elytron: lateral margin finely toothed basally, teeth less dense but larger apically; apical margin truncate, with large tooth in exterior apical angle and at end of carina 2; with 10 rows of punctures, scutellar row absent; carinae 1 and 2 straight, carina 3 from humerus to apical ¼; elytral length 5.1–6.4 mm; elytral width 2.1–2.6 mm. Venter: pro-meso, and metasterna smooth medially, rugose laterally; abdominal sterna slightly rugose laterally. Leg: protibia of male with large tooth. Total length: 6.5–8.3 mm.

Remarks. This species is distinguished by the elytra without a scutellar row; by the vertex of the head being trisulcate; by antennomere 2 being transverse; and by the disc of the pronotum being impunctate.

Host plant. Unknown.

Distribution. Brazil, Ecuador, Peru, and Trinidad (BWI).

Specimens examined. Brazil. Amazonas, Benjamim Constant ( Rio Javari ) ( MZUP) . Matto Grosso , 17– 22.iii.1977 ( EGRC) . Pará: Utinga Belem , 10–22.xi.1963 ( AMNH) . Rondonia: “Ahrenhoiz” Trail off B-65, 3 km N linea c-20, 21.iii.1991 ( BYUC) . Ecuador. Napo: Tena , 24.v.1977, 27.v.1977 ( USNM) . Peru. Cuzco: Quillabamba , 4.ii.1979 ( USNM) . Huanuco: Tingo Maria, Monzon Valley , 23.ix.1954 ( CASC) . Trinidad. St. Andrew: near Valencia , 23.iii.1985 ( USNM) . Total : 9 .

Figures

FIGURES 9–14. Habitus of Oxychalepus species. 9. Oxychalepus insignitus. 10. Oxychalepus normalis. 11. Oxychalepus opacicollis. 12. Oxychalepus paranormalis. 13. Oxychalepus posticatus. 14. Oxychalepus proximus.