Aphelocerus cornuatus, OPITZ, 2005

OPITZ, WESTON, 2005, Classification, Natural History, And Evolution Of The Genus Aphelocerus Kirsch (Coleoptera: Cleridae: Clerinae), Bulletin of the American Museum of Natural History 2005 (293), pp. 1-128 : 61

Aphelocerus cornuatus , new species Figures 60 , 167 ; map 21

HOLOTYPE: Male. Mexico, Atoyac , May, H. H. S. ( BMNH). (Specimen point mount­ ed, pygidium, sixth visible abdominal sternum and machine printed sex label affixed to paper point; support card, white, locality label, white, machine printed; year label ‘‘1907­156’’, white, machine printed; BMNH repository label, white, machine printed; holotype label, red, machine and hand printed; plastic vial with aedeagus.)

PARATYPES: Three specimens with the same locality information as the holotype ( BMNH, 1; ZMHB, 1; WOPC, 1) .

DIAGNOSIS: The combination of small size (4 mm), Mexican distribution, and presence of a bipartite elytral discal setal tuft (fig. 167) will identify the members of this species. The acuminate­curvate shape of the parameres easily identifies the males.

DESCRIPTION: Size: Length 4.0– 4.2 mm; width 1.5–1.8 mm. Integument: Cranium black, remainder of body piceous. Vestiture: Integument vested with mostly dark setae, few pale setae; metepisternal, sutural, and elytral middiscal tufts prominent; latter tuft bipartite, setae of anterior patch directed anteriorly, setae of posterior patch directed posteriorly. Head: Width across eyes as wide as greatest width across pronotum (18:18); interocular depressions and frontal umbo broad and shallow; eyes moderately convex; antenna as in figure 60. Thorax: Pronotum subequal in width and length (17:18), considerably narrower than width across humeri (17: 24), with very few fine punctations, lateral margins feebly arcurate, subapical depression feebly impressed; elytra feebly convex in posterior half, depth at humerus 10, greatest depth in posterior half 15, surface finely punctate. Abdomen: Male pygidium evenly arcuate in distal margin; female pygidium subconic. Male genitalia: As in A. acutus fig. 130); parameres acuminate and concave along median margin near apex; ventral sinus twice length of dorsal sinus.

VARIATION: The available specimens did not vary appreciably.

NATURAL HISTORY: The material examined was collected in May from Atoyac, Mexico, which is at an altitude of about 400 m.

DISTRIBUTION (map 21): Known only from the type locality.

ETYMOLOGY: From the Latin cornu (horn) and the Latin suffix ­ atus (having the nature of). I refer to the horn like configuration of the parameres.

REMARKS: The locality label of the type specimen indicates that Atoyac is in ‘‘Estado Veracruz’’; however the only Atoyac locality known to me is located in ‘‘Estado Guerrero’’.

Figures

Figs. 47–61. Habitus view and antennas. 47. Aphelocerus formicoides (habitus, lateral view). 48– 61. Antennas. 48. A. ciliaris. 49. A. inconstans. 50. A. domus. 51. A. echinatus. 52. A. bispineus. 53. A. citimus. 54. A. leucomelas. 55. A. coalitus. 56. A. inbatus. 57. A. coactus. 58. A. nitidus. 59. A. lividus. 60. A. cornuatus. 61. A. acutus.

Figs. 162–183. Aedeagus, habitus, elytral discal setal tufts. 162. Aphelocerus dispilis, aedeagus. 163. Weevil, Myrmex sp. 164. Aphelocerus myrmecoides, 165–183. Elytral discal setal tufts. 165. A. sagittarius. 166. A. triangulus. 167. A. cornuatus. 168. A. humerus. 169. A. acutus. 170. A. lividus. 171. A. protenus. 172. A. argus. 173. A. arenatus. 174. A. catie. 175. A. chiriqui. 176. A. yungas. 177. A. monteverde. 178. A. anticus. 179. A. batesi. 180. A. bufustis. 181. A. acanthus. 182. A. yungas. 183. A. sturnus.