Cyclocaccus laeticulus, 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. laeticulus species-group

( Figs. 1–9 , Maps 1–3)

Diagnosis. Length (n = 40) 1.57–2.40 (2.01) mm, width 1.30–1.99 (1.64) mm, depth 0.74–1.14 (0.97) mm. The group differs from other speciesgroups by the following combination of characters: apical margin of abdominal tergite VII widely rounded; prosternum feebly convex along midline; metathoracic discrimen absent; metanepisternum and abdominal sternites impunctate; inter-mesocoxal distance (n = 7) separated by 1.39–2.02 times width of inter-procoxal distance; inter-metacoxal distance (n = 7) separated by 1.95–2.60 times width of interprocoxal distance; abdominal sternite III without subcoxal lines; male pro- and mesotarsomeres I–III weakly or moderately bilobed; apical and lateral margins of tegmen strongly undulating; gonocoxites deeply incised at apex.

Distribution. Highlands of Mexico, Central and South America.

Comments. This species-group shows the most apparently plesiotypic characters among species- groups based on a limited review of genera within the cyllodine complex ( Table 1), including the widely rounded apical margin of abdominal tergite VII, feebly convex midline of prosternum, absence of subcoxal lines on abdominal sternite III, feebly to moderately bilobed pro- and mesotarsomeres I–III, and deeply incised apices of gonocoxites. Seven species are recognized in this study.

Figures

Fig. 1. Dorsal habitus of Cyclocaccus species in the C. laeticulus species-group. A) C. clinei, holotype, B) C. laeticulus, holotype, C) C. laeticulus, holotype, labels, D) C. laeticulus, Venezuela, E) C. speciosus, holotype, F) C. monticola, lectotype, G) C. monticola, lectotype, labels, H) C. monticola, Guatemala, I) C. monticola, Bolivia, J) C. costaricensis, holotype, K) C. maculatus, holotype, L) C. epakros, holotype. Scale bars = 1 mm.

Fig. 2. Diagnostic characters of the C. laeticulus species-group. Cyclocaccus laeticulus: 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, I) Male abdominal tergite VII, J) Male abdominal sternite VII, K) Metendosternite, dorsal view, L) Male protibia and protarsus, dorsal view, M) Male mesotibia and mesotarsus, dorsal view, N) Male metatibia and metatarsus, dorsal view, O) Male abdominal tergite VIII and spiculum gastrale, ventral view, P) Left metanepisternum. Scale bars: A = 1 mm; B–C, I–J, P = 0.5 mm; D–H, K–O = 0.1 mm.

Fig. 3. Cyclocaccus clinei, Costa Rica. A) Tegmen, ventral view, B) Median lobe, ventral view, C) Right antenna, ventral view, D) ovipositor. Scale bars = 0.1 mm.

Fig. 4. Cyclocaccus laeticulus. A, C) Tegmen, ventral view, B, D) Median lobe, ventral view, E) Right antenna, F) Ovipositor. A–B, E–F from Costa Rica specimen; C–D from Venezuela specimen. Scale bars = 0.1 mm.

Fig. 5. Cyclocaccus speciosus. A, C, E) Tegmen, ventral view, B, D, F) Median lobe, ventral view, G) Right antenna, ventral view, H) Ovipositor. A–D, G–H from Guyana specimens; E–F from Bolivia specimen. Scale bars = 0.1 mm.

Fig. 6. Cyclocaccus monticola. A, C, E) Tegmen, ventral view, B, D, F) Median lobe, ventral view, G) Right antenna, ventral view, H) Ovipositor. A–B, G from Guatemala; C–D from Honduras specimen; E–F from Bolivia specimens. Scale bars = 0.1 mm.

Fig. 7. Cyclocaccus costaricensis, Costa Rica. A) Tegmen, ventral view, B) Median lobe, ventral view, C) Right antenna, ventral view, D) Ovipositor. Scale bars = 0.1 mm.

Fig. 8. Cyclocaccus maculatus, Mexico. A) Tegmen, ventral view, B) Median lobe, ventral view, C) Right antenna, ventral view, D) Ovipositor. Scale bars = 0.1 mm.

Fig. 9. Cyclocaccus epakros, Guerrero, Mexico. A) Tegmen, ventral view, B) Median lobe, ventral view, C) Right antenna, ventral view, D) Ovipositor. Scale bars = 0.1 mm.