Artoadenus OPITZ, 2015

Opitz, Weston, 2015, Systematics of the checkered beetle subfamily Platynopterinae SPINOLA (Coleoptera Cleridae), Linzer biologische Beiträge 47 (2), pp. 1513-1572 : 1525-1526

Artoadenus OPITZ , new genus

Type species: Artoadenus dius OPITZ , new species. By present designation.

Diagnosis: Within Platynopterinae only in the male members of Artoadenus and Platynoptera do we find a glandular pit on the metatibiae ( Fig. 100 ). However, Artoadenus specimens may be distinguished from specimens of Platynoptera by the shape of the terminal palpomeres of the maxilla and labium. In Artoadenus these palpomeres are subdigitiform whereas in Platynoptera they are strongly securiform.

Description: Size: Length 10.0-16.0 mm; width 5.0-7.0. Form: Elytra oval,posterior angle broadly rounded ( Fig. 147 ). — Integumental color: Antenna black; mandible black, other mouthparts flavotestaceous, maxillary and labial terminal palpomeres black; cranium mostly black, epicranium narrowly flavotestaceous, lower frons flavotestaceous; pronotum bicolorous, mostly flavotestaceous, disc with two paralateral black streaks; elytra unicolorous or bicolorous, when unicolorous flavotestaceous, when bicolorous black regions usually at elytral apical third, flavotestaceous in remainder, rarely with two black fasciae; legs mostly black, posterior facies flavotestaceous; pterothorax mostly flavotestaceous; abdomen black. Vestiture: Integument highly setose, funicular antennomeres densely setose, cranium and pronotum densely vested with decumbent setae, elytra densely vested with short secondary setae and fewer primary setae that become more prominent along epipleural and sutural margins; legs highly setose. Head: Cranial setose punctation small; eyes bulging, finely faceted and deeply broadly incised along frontal margin; antenna ( Fig. 64 ) capitate, inserted at level of eye incision (= ocular notch); antennal carina very prominent, comprised of 11 antennomeres, scape very robust, pedicel rotund, funicular antennomeres transverse, capitulum very long, about 5 times longer that length of other antennomeres combined, anterior margin of capitular antennomeres undulated; labrum deeply incised, transverse tormal process horizontal and contiguous; mandible robust; maxilla well developed, terminal palpomere subsecuriform; labium well developed, terminal palpomere subsecuriform; gula triangular. Thorax: Pronotum with incipient trichobothrium, transverse, side margins rounded, anterior margin linear, prebasal depression feebly developed, dorsolateral carina not extended to anterior margin of pronotum, carina joins pronotal hem at pronotal posterior angle; elytra trapezoidal, increasingly widened to rounded posterior angles, discal carinae faintly visible, 1º and 2º elytral setae present; mesoscutellum triangular; protibial anterior margin spinous; ungues with denticle; tibial spur formula 0-1-1; tarsal pulvillar formula 3-3-3; glandular pit on male metatibia. Abdomen: Six visible sternites; pygidium rounded distally in males. Male genitalia ( Figs 113, 114 ): Aedeagus short, tegmen feebly sclerotized, lobate distally, fimbriate; phallus well sclerotized; spicular fork comprised of two narrow plates that connect at proximal fourth, intraspicular plate narrow and long.

Distribution: The members of this genus are known from México, Panamá, Venezuela, French Guiana, and Guyana.

Etymology: The generic epithet is a compound name stemming from the Latin artus (= limb) and the Greek aden (= gland). I refer to the glandular pit on the male metatibia.

Figures

Figs 97-102: Morphological organs of Platynoptera lyciformis. (97) Head, frontal view; (98) Protibia; (99) Metathoracic leg; (100) Male metathoracic leg showing glandular pit; (101) Metatibial tarsus; (102) Pronotal disc showing incipient trichobothrium.

Figs 145-148: Habitus illustrations of (145) Ambonoides retinoides, holotype; (146) A. caraguata, holotype; (147) Artoadenus dius, holotype; (148) A. regina, holotype.

Figs 62-69: Antennae. (62) Ambonoides retinoides, male; (63) A. caraguata, female; (64) Artoadenus dius, male; (65) A. regina, male; (66) Aspitonis alarutinis, male; (67) A. graminis, female; (68) A. undulicornis, male; (69) Isoforma biguttula, male.

Figs 109-132: Aedeagi. (109) Ambonoides retinoides phallus; (110) A. retinoides tegmen; (111) A. caraguata phallus; (112) A. caraguata tegmen; (113) Artoadenus dius phallus; (114) A. dius tegmen; (115) A. regina phallus; (116) A. regina tegmen; (117) Aspitonis alarutinis phallus; (118) A. alarutinis tegmen; (119) A. chiapas phallus; (120) A. chiapas tegmen; (121) A. undulicornis phallus; (122) A. undulicornis tegmen; (123) Isoforma biguttula phallus; (124) I. biguttula tegmen; (125) Platynoptera carti phallus; (126) P. carti tegmen; (127) P. flavohumeralis phallus; (128) P. flavohumeralis tegmen; (129) P.humeralis phallus; (130) P. humeralis tegmen;(131)P.lyciformis phallus;(132)P.lyciformis tegmen.