Aphelocerus triangulus, 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 : 73

Aphelocerus triangulus , new species Figures 65 , 118, 119 , 166 ; map 21

HOLOTYPE: Female. Guatemala. L. Conradt ( MNHN). (Specimen point mounted; pygidium, sixth visible abdominal sternum, and machine printed sex label affixed to paper point; support card, white; locality label, white, machine printed; Paris Museum repository label, white, machine printed; holotype label, red, machine and hand printed; plastic vial with abdomen and ovipositor.)

PARATYPE: None.

DIAGNOSIS: Within the batesi group these beetles are distinguished by their large size and by the trigonal shape of the pygidium (fig. 118) in combination with the development of the elytral discal setal tuft (fig. 166).

DESCRIPTION: Size: Length 6.5 mm; width 2.8 mm. Integument: Cranium, thorax, legs, and abdomen cyanescent; elytra piceous. Vestiture: Integument vested predominantly with dark setae, few pale setae; metepisternal, sutural, and elytral setal tufts moderately developed; patches of middiscal elytral setal small. Head: Width across eyes narrower than width across pronotum (29:34); finely punctate; eyes subspherical, moderately convex, antenna as in figure 65. Thorax: Pronotum subequal in width and length, narrow­ er than elytra across humeri (34:39); side margin strongly arcuate; elytral depth at humerus 18, greatest depth in posterior half 20; humeral umbo particularly well developed. Abdomen: Female pygidium and sixth visible sternum as in figures 118 and 119; pygidium notably trigonal.

VARIATION: No information available.

NATURAL HISTORY: No information available.

DISTRIBUTION (map 21): Known only from Guatemala.

ETYMOLOGY: The specific epithet is from the Latin triangulus (having three angles). I refer to the trigonal shape of the pygidium.

Figures

Figs. 62–84. Antennae. 62. Aphelocerus sagittarius. 63. A. irroratus. 64. A. naevius. 65. A. triangulus. 66. A. extensivus. 67. A. humerus. 68. A. argus. 69. A. protenus. 70. A. arenatus. 71. A. patulus. 72. A. monteverde. 73. A. chondrus. 74. A. catie. 75. A. chiriqui. 76. A. immarginatus. 77. A. anticus. 78. A. yungas. 79. A. batesi. 80. A. bufustis. 81. A. acanthus. 82. A. sturnus. 83. A. myrmecoides. 84. A. scutellaris.

Figs. 85–120. Antennae, pygidia, and sixth visible abdominal sterna. 85–90. Antennae. 85. Aphelocerus affaniatis. 86. A. dispilis. 87. A. formicoides. 88. A. cheliferous. 89. A. panus. 90. A. calvus. 91– 120. Pygidium and/or sixth visible abdominal sternum. 91–94. A. ciliaris. 91–92. male (91, pygidium; 92, sixth visible abdominal sternum). 93–94. female (93, pygidium; 94, sixth visible dominal sternum). 95. A. coactus, female pygdium. 96. A. domus, female pygidium. 97–100. A. coalitus, male (97, pygidium; 98, sixth visible abdominal sternum), 99–100. Female (99, pygidium; 100, sixth visible abdominal sternum). 101. A. leucomelas, male pygidium. 102–104. A. coactus. 102–103. male (102, pygidium; 103, sixth visible abdominal sternum). 104, female, pygidium. 105–106. A. acutus, pygidea (105, male; 106, female). 107–109. A. lividus. 107, male (pygidium). 108–109, female (108, pygidium; 109, sixth visible abdominal sternum). 110–113. A. sagittarius. 110–111, male (110, pygidium; 111, sixth visible abdominal sternum). 113, female, pygidium. 114–115. A. humerus, female (114, pygidium; 115, sixth visible abdominal sternum). 116–117. A. naevius, female (116, pygidium; 117, sixth visible abdominal sternum). 118–119. A. triangulus, female (118, pygidium; 119, sixth visible abdominal sternum). 120. A. arenatus, male, pygidium.

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.