Canthochilum mimicum Philips & Ivie

Philips, Keith & Ivie, Michael A., 2008, Seven new species of Canthochilum Chapin from Hispaniola (Coleoptera: Scarabaeidae: Scarabaeinae), Zootaxa 1730, pp. 27-42 : 33-34

Canthochilum mimicum Philips & Ivie , new species

Figs. 4 , 10, 16, 22, 28, 37

Diagnosis. The elytron with a yellow-orange patch at the base and the evenly rounded sides laterally without trace of lateral carina or angulate margin between seventh and eighth striae will diagnose this species.

Description (male). Body oblong, black, legs distinctly paler, elytron with yellow-orange patch at basal 2/5, starting from near the base at usually 2nd (but sometimes 1st) interval, running obliquely posteriorly to fourth interval, continuing approximately transversely and slightly irregularly to lateral margin ( Fig. 37 ); dorsal surface of head with extremely fine punctures separated by 6 to 9 X their diameter, surface smooth throughout; clypeus with 4 teeth anteriorly, mesal teeth relatively more acute than those more laterad, tips blunt, clypeal-genal projections lacking (Fig. 10); dorsal ocular area very small, eyes separated by a distance equal to 8X their transverse width (Fig. 10); elytral striae moderately distinct, with fine punctures along length; elytral intervals very slightly convex, with very fine scattered punctures visible under high magnification, surface smooth and shining; elytra evenly rounded laterally, without trace of lateral carina or angulate margin between seventh and eighth striae, punctures of eighth stria continuous and coarse except at extreme base; protibiae with 3 teeth, distally truncate ( Fig. 22 ); protibial spur broad, slightly hooked, nearly reaching 5th tarsomere; metatibia very weakly arcuate; mesosternal suture anteriorly nearly truncate ( Fig. 16); pygidium lacking margin middle of lower margin, slightly convex, surface very finely punctured and smooth; aedeagus with basal piece apex with small finger-like process projecting posteriorly and distant from large triangular paramere lobes ( Fig. 28 ). Length: 2.3 – 2.4 mm, measured along midline from anterior margin of pronotum to tip of elytra.

Female. Differs from the male in the smaller, straight protibial spurs.

Types. HOLOTYPE MALE, ALLOTYPE FEMALE: DOM.REP: Prov. Pedernales; 20 km N. Cabo Rojo, 365m; Las Mercedes turn-off; 21–22 AUG 1988; dung baited pit-fall trap [NMNH]. PARATYPES. 5 MALES, 4 FEMALES — same data as holotype [MNHD, TKPC, WIBF]. 2 MALES, 1 FEMALE — DOM. REP: Prov. Pedernales; 24 km N. Cabo Rojo, 610m; 20 AUG – 0 9 SEP 1988, flight; intercept trap, M. A. Ivie,; T. K. Philips & K. A. Johnson [TKPC, WIBF].

Etymology. The name “ mimicum , ” derived from Greek for an actor or mime, refers in this case to the close resemblance of our species in size and color pattern to Canthonella isabellae Matthews , with which it is sympatric.

Figures

FIGURES 1 – 6. Labia. 1. Canthochilum brodzinskyorum; 2. Canthochilum magnum; 3. Canthochilum matthewsi; 4. Canthochilum mimicum; 5. Canthochilum nebulonemi; 6. Canthochilum platycnemis.

FIGURES 34 – 37. Dorsal habiti. 34. Canthochilum brodzinskyorum; 35. Canthochilum magnum; 36. Canthochilum matthewsi; 37. Canthochilum mimicum.

FIGURES 19 – 24. Protibia, dorsal view. 19. Canthochilum brodzinskyorum; 20. Canthochilum magnum; 21. Canthochilum matthewsi; 22. Canthochilum mimicum; 23. Canthochilum nebulonemi; 24. Canthochilum platycnemis.

FIGURES 25 – 30. Male genitalia, lateral view. 25. Canthochilum brodzinskyorum; 26. Canthochilum magnum; 27. Canthochilum matthewsi; 28. Canthochilum mimicum; 29. Canthochilum nebulonemi; 30. Canthochilum platycnemis.