Hemicolpus, Heller, 1895

Sanz-Veiga, Priscila A., Savaris, Marcoandre, Leivas, Fernando W. T., Medeiros, Alexandre Da Silva & Amorim, Felipe W., 2023, A new seed-feeding species of Hemicolpus Heller, 1895 from south Brazil and redescription of Hemicolpus abdominalis Hustache, 1938 (Coleoptera: Curculionidae: Conoderinae), Zootaxa 5227 (3), pp. 301-327 : 323

Key to species of Hemicolpus

1. Pronotal midline carina strongly humped or raised, almost as high as long; Brazil............ Hemicolpus heteromorphus

- Pronotal midline carina not humped, or only slightly raised.................................................... 2

2. Mesoventrite strongly excavated ( Figs. 5a, b , 34a, b ); second abdominal ventrite bearing a pair of tubercles ( Figs. 19, 20 , 46, 47 )................................................................................................ 3

- Mesoventrite flat (not-excavated); second abdominal ventrite without tubercles.................................... 4

3. Inner glabrous triangular patch extending at maximum over a third of the area of the mesanepisternum ( Fig. 35 ); metafemur not carinate ( Fig. 36a ); inner flange of the tibial apex almost as wide as long; premucro oriented 45° ( Fig. 36b ); penis with preapical constriction ( Fig. 50 ); gonocoxite without unsclerotized stripe ( Fig. 53 ); Bolivia, Brazil, Paraguay...................................................................................................... Hemicolpus abdominalis

- Inner glabrous triangular patch extending over almost half of the area of the mesanepisternum ( Fig. 6 ); metafemur with carina at inner face ( Fig.7a ); inner flange of the tibial apex longer than wide; premucro oriented 90° ( Fig. 7b ); penis without preapical constriction ( Fig. 23 ); gonocoxite with unsclerotized transverse stripe ( Fig. 26 ); Brazil......... Hemicolpus maragatensis

4. Body glabrous; elytral interstriae not raised; Brazil........................................... Hemicolpus cubicus

- Body covered with scales; elytral interstriae raised.......................................................... 5

5. Body scales longer and narrower; anterior margin of metaventrite carinate and strongly excavated beneath.............................................................................................. Hemicolpus costaricensis

- Body scales shorter and broader; anterior margin of metaventrite not excavated.................................... 6

6. Anterior margin of metaventrite strongly declivous with weak depression; pronotum with distinct callosities; elytral interstriae 3 and 9 raised for most of their length; interstriae 5 raised at base; El Salvador and Mexico........... Hemicolpus prenai

- Anterior margin of metaventrite strongly declivous without depression; pronotum with faint callosities; elytral interstriae 3 and 9 raised at the erect white setae and slightly beyond; interstriae 5 raised for most of its length; El Salvador and Mexico........................................................................................ Hemicolpus randiae

Figures

FIGURES 2–5. Adult of Hemicolpus maragatensis 2) Habitus, male lateral view. 3) Habitus, male dorsal view. Scale bars = 1 mm. 4) Lateral view, highlighting the sclerolepidia (white arrow). Scale bar = 0.2 mm. 5) Prothorax ventral view; a. showing the yellowish flat scales on the sternellum (red arrow) within the prosternal canal and the mesoventral canal (blue arrow). Scale bar = 0.5 mm. b. Strongly excavated meso- and metaventral canal after removing the pronotum, showing the mesoventral carina (red arrow) and the lateral patch of whitish scales (blue arrow). Scale bar = 0.2 mm.

FIGURES 31–34. Adult of Hemicolpus abdominalis 31) Habitus, female lateral view. 32) Habitus, female dorsal view. Scale bars = 1 mm. 33) Lateral view with detail of sclerolepidia (white arrow). Scale bar = 0.2 mm. 34) Prothorax ventral view a. showing the yellowish flat scales on the sternellum (red arrow) within the prosternal canal and the mesoventral canal (blue arrow). Scale bar = 0.2 mm. b. Detail of the meso- and metaventral canal after removing the pronotum, showing the mesoventral carina (red arrow) and the lateral patch of yellowish scales (blue arrow). Scale bar = 0.2 mm.

FIGURES 15–20. Hemicolpus maragatensis external sexual dimorphism 15) Lateral view of the male rostrum. 16) Lateral view of the female rostrum. Scale bars = 0.5 mm. 17) Male rostrum dorsal view. 18) Female rostrum dorsal view. Scale bars = 0.5 mm. 19) Male ventral view showing the depression within the first ventrite with the yellowish patch of scales (red arrow) and the pair of tubercles on the second abdominal ventrite (blue arrow). 20) Female ventral view. Scale bars = 1 mm.

FIGURES 44–47. Hemicolpus abdominalis external sexual dimorphism 44) Lateral view of the male rostrum. 45) Lateral view of the female rostrum. Scale bars = 0.5 mm. 46) Male ventral view, showing the depression and the yellowish patch of scales on the first ventrite (red arrow) and the pair of tubercles on the second abdominal ventrite (blue arrow). 47) Female ventral view. Scale bars = 1 mm.

FIGURES 35–38. Adult of Hemicolpus abdominalis 35) Male frontal view of the head and pronotum, highlighting the small triangular, glabrous patch on the inner basal angle of the mesanepisternum (red arrows). Scale bar = 0.5 mm. 36) Hindleg a. anterior view of femur and tibia. Scale bar = 0.2 mm. b. detail of the tibial apex, with a large uncus, round inner flange, and premucro at the inner angle (black arrow). Scale bar = 0.1 mm. 37) Ventral view of elytra, showing the subapical yellowish microtrichia field (red arrow) and the left elytron flange along the suture line (black arrow). Scale bar = 0.5 mm. 38) Posterior view, abdominal ventrites II to V, highlighting the patch of dark-brown scales within the second ventrite concavity (green arrow). Scale bar = 0.5 mm.

FIGURES 48–52. Hemicolpus abdominalis, male terminalia 48) Tergite VIII, sternites VIII and IX, ventral view. 49) Tergite VIII dorsal view. 50) Penis dorsal view. Scale bars = 0.2 mm. 51) Penis lateral view. 52) Tegmen dorsal view. Scale bar = 0.2 mm.

FIGURES 53–57. Hemicolpus abdominalis, female terminalia 53) Tergite VIII, gonocoxite and stylus, ventral view. 54) Tergite VIII dorsal view. 55) Sternite VIII. 56) Bursa copulatrix. 57) Spermatheca and spermathecal gland. Scale bars = 0.2 mm.

FIGURES 6–9. Hemicolpus maragatensis 6) Male frontal view of the head and pronotum, highlighting the triangular, glabrous patch on the inner basal angle of the mesanepisternum (red arrows). Scale bar = 0.5 mm. 7) Hindleg; a. showing the longitudinal carina on the inner face of the metafemur (white arrow). Scale bar = 0.2 mm. b. detail of the tibial apex, the curved uncus, the inner flange, and a small premucro (black arrow). Scale bar = 0.1 mm. 8) Ventral view of elytra, showing the subapical microtrichia field (red arrow) and the left elytron flange along the suture line (black arrow). Scale bar = 0.5 mm. 9) Posterior view of abdominal ventrites II to V, highlighting the second ventrite concavity covered with a dense patch of brown scales (green arrow). Scale bar = 0.5 mm.

FIGURES 21–25. Hemicolpus maragatensis male terminalia 21) Tergite VIII, sternites VIII and IX, ventral view. 22) Tergite VIII dorsal view. Scale bars = 0.2 mm. 23) Penis dorsal view. 24) Penis lateral view. Scale bars = 0.2 mm. 25) Tegmen dorsal view. Scale bar = 0.2 mm.

FIGURES 26–30. Hemicolpus maragatensis female terminalia. 26) Tergite VIII, gonocoxite and stylus, ventral view. 27) Tergite VIII dorsal view. 28) Sternite VIII. Scale bars = 0.2 mm. 29) Bursa copulatrix. 30) Spermatheca and spermathecal gland. Scale bar = 0.1 mm.