Antennosus Opitz

Opitz, Weston, 2014, Taxonomy of the New World Checkered Beetle GeneraAkonesisOpitz, New Genus, AntennosusOpitz, New Genus, CrusbatusOpitz, New Genus, andDiutiusOpitz, New Genus (Coleoptera: Cleridae: Peloniinae), The Coleopterists Bulletin 68 (3), pp. 411-428 : 415-418

Antennosus Opitz , new genus

Type Species. Ichnea impressocollis Gorham, 1877: 414 .

Diagnosis. The type species of this monotypic genus was associated with the genus Ichnea Laporte , but specimens of Antennosus lack trichobothria, and the antennae are inserted proximad the antennal notch. The broad pronotal indentations and the extraordinarily long capitulum will distinguish the members of this genus ( Fig. 65 ).

Description. Size: Length 7.0–9.0 mm; width 2.5–3.5 mm. Form ( Fig. 65 ): Oblong, rectangulate (about 3X longer than broad). Vestiture: Dorsum profusely vested with pale pubescence; antenna moderately setose; elytra with 1° and no 2° setae. Head ( Figs. 16–18 ): Cranium subquadrate, frons very narrow, indented with small setiferous punctures; gula ( Fig. 17 ) large, triangular, sutures converging, gula with 2 well-developed, setose post-gular processes ( Fig. 17 ); labrum shallow, incised distally; mandibles ( Fig. 23 ) stout, anterior dens acuminate, medial and posterior dens well-developed, penicillus well-developed; maxilla ( Fig. 26 ) with laterolacinia well-developed, terminal palpomere digitiform; labium ( Fig. 24 ) with ligula deeply incised, ligular lobes narrowed, terminal palpomere digitiform, capitulum long and slender ( Figs. 20, 21 ); eyes very large, coarsely faceted, ocular notch large; antenna comprised of 10 antennomeres, capitate, capitulum long and slender, funicular antennomeres subquadrate. Thorax: Pronotum ( Fig. 19 ) transverse, disc with 2 broad indentations, side margins without lateral tubercle, dorsolateral carina incomplete, confluent with pronotal hem posteriorly, prointercoxal process narrow ( Fig. 19 ), not expanded distally; pronotal projections short, not approximating prointercoxal process; elytral disc without asetiferous punctures, epipleural fold narrow and in ventral position, tapered to elytral apex, elytral anterior margin not carinate; metathoracic wing as in Fig. 22 , wedge cell closed; metendosternite ( Fig. 25 ) with furcal lamina, furcal anterior plate convex; anterior protibial margin spinous, profemora not swollen and without spines, tibial spur formula 1-2-2, tarsal pulvillar formula 3-3-3, ungues with basal denticle. Abdomen: Aedeagus ( Figs. 28, 29 ) shorter than length of abdomen, distal region of phallobase not lobed, tegmen short, phallobasic struts confluent with phallobasic apodeme, phallobasic rod absent, phallic plates wide, with subapical uncus; spicular fork ( Fig. 27 ) well-developed, spicular apodemes not fused, intraspicular plate long and linear.

Distribution. This genus is known from Panama to Argentina ( Fig. 60 ).

Etymology. The generic name stems from the Latin noun antenna (= a sensory appendage on the head of an insect) and the suffix – osus (= abundance). I refer to the very long capitulum of these insects.

Figures

Figs. 65–66. Habitus. 65) Antennosus impressocollis; 66) Crusbatus spinosus.

Figs. 16–29. Antennosus impressocollis. 16) Head, frontal view; 17) Head, ventral view; 18) Head, dorsal view; 19) Prothorax, ventral view; 20) Antenna, male; 21) Antenna, female; 22) Metathoracic wing; 23) Mandible; 24) Maxilla; 25) Metendosternite; 26) Maxilla; 27) Spicular fork; 28) Tegmen; 29) Phallus.

Fig. 60. Distribution of Antennosus impressocollis and Crusbatus spinosus.