Cyclocaccus brevicollis, Sharp, 1891

Hisamatsu, Sadatomo, Bayless, Victoria M. & Carlton, Christopher E., 2016, Revision ofCyclocaccusSharp (Coleoptera: Nitidulidae: Nitidulinae), The Coleopterists Bulletin 70 (4), pp. 825-870 : 825-870

C. brevicollis species-group

( Figs. 10–14 , Map 4)

Diagnosis. Length 1.69–2.20 (1.84) mm, width 1.44–1.90 (1.56) mm, depth 0.84–1.11 (0.91) mm (n = 11). This group differs from the other speciesgroups by the following combination of characters: body round; dorsal surface of mandible with latitudinal keel at middle; apical margin of abdominal tergite VII widely rounded; prosternum feebly convex along midline; metathoracic discrimen absent; metanepisternum and abdominal sternites densely punctate; inter-mesocoxal distance separated by 1.23–1.55 (n = 3) times width of inter-procoxal distance; inter-metacoxal distance separated by 2.05–2.22 (n = 3) times width of inter-procoxal distance; abdominal sternite III with or without subcoxal lines; male pro- and mesotarsal segments I–III weakly dilated; tegmen short and wide; apicolateral corners of tegmen with tuft of setae in ventral view; apices of gonocoxites square.

Distribution. Central and South America.

Comments. Three species are recognized in the present study. One species, C. brevicollis , is found only from Central America. Other congeners are distributed in South America.

Figures

Fig. 10. Dorsal habitus of Cyclocaccus species in the C. brevicollis species-group. A) C. brevicollis, holotype, B) C. brevicollis, holotype, labels, C) C. oenorubens, holotype, D) C. pantherinus, holotype, Peru, E) C. pantherinus, Peru, F) C. pantherinus, Ecuador. Scale bars = 1 mm.

Fig. 11. Diagnostic characters of the C. brevicollis species-group. Cyclocaccus brevicollis: A) Ventral habitus, B) Head, dorsal view, C) Head, ventral view, D) Labrum; E) Mentum and labium, ventral view, F) Right maxilla, dorsal view, G) Right mandible, dorsal view, H) Scutellum. Cyclocaccus oenorubens, Brazil: I) Abdominal sternites. Cyclocaccus brevicollis: J) Male abdominal tergite VII, K) Male abdominal sternite VII, L) Metendosternite, dorsal view, M) Male protibia and protarsus, dorsal view, N) Male mesotibia and mesotarsus, dorsal view, O) Male metatibia and metatarsus, dorsal view, P) Male abdominal tergite VIII and spiculum gastrale, ventral view, Q) Left metanepisternum. Scale bars: A = 1 mm; B–C, I–K, Q = 0.5 mm; D–H, L–P = 0.1 mm.

Fig. 12. Cyclocaccus brevicollis, Panama. A) Tegmen, ventral view, B) Median lobe, ventral view, C) Right antenna, ventral view, D) Ovipositor. Scale bars = 0.1 mm.

Fig. 13. Cyclocaccus oenorubens, Guyana. A) Tegmen, ventral view, B) Median lobe, ventral view, C) Right antenna, ventral view, D) Ovipositor. Scale bars = 0.1 mm.

Fig. 14. Cyclocaccus pantherinus, Peru. A) Tegmen, ventral view, B) Median lobe, ventral view, C) Right antenna, ventral view, D) Ovipositor. Scale bars = 0.1 mm.