Chicanatonus hovorei Bezark and Santos-Silva, 2023

Bezark, Larry G. & Santos-Silva, Antonio, 2023, New species, synonymies and transfers in Neotropical Lamiinae (Coleoptera: Cerambycidae), Insecta Mundi 2023 (993), pp. 1-26 : 12-15

Chicanatonus hovorei Bezark and Santos-Silva , new species

( Fig. 20–26 )

Description. Holotype female. Integument mostly dark brown; anteclypeus testaceous; anterior half of labrum yellowish brown; ventral mouthparts mostly brown, except blackish palpomeres with yellowish-brown apex. Scape reddish brown about basal half, dark brown on remaining surface; antennomeres III–XI orangish brown with dark brown apical area, orangish-brown area gradually shorter toward distal segments (orangish-brown and dark-brown areas with similar length on some antennomeres). Elytra gradually dark reddish brown toward apex. Base of trochanters orangish brown. Tibiae with wide orangish-brown central ring.

Head. Frons abundantly, minutely punctate; with abundant yellowish-brown pubescence partially obscuring integument, pubescence whiter centrally between eyes; with one long, erect dark-brown seta close to each eye. Area between antennal tubercles and middle of upper eye lobes with dense yellowish-white pubescence, except glabrous median groove, glabrous area expanded toward anterior region of upper eye lobes; remaining surface of vertex with dense pale-yellow pubescence anteriorly, except glabrous central area, this glabrous area expanded toward glabrous area close to prothorax. Area behind upper eye lobes with dense yellowish-brown pubescence close to eye, glabrous close to prothorax. Area behind lower eye lobes with dense yellowish-brown pubescence superiorly close to eye, with dense pale-yellow pubescence on remaining area, pubescent area distinctly narrowed centrally and widened inferiorly, pubescence more yellowish-white toward inferior margin; area close to prothorax glabrous. Genae with dense yellowish-white pubescence except glabrous apex; with a few long, erect dark-brown setae interspersed. Wide central area of postclypeus with abundant yellowish-white pubescence partially obscuring integument close to frons, slightly yellower close to anteclypeus; with long, erect setae interspersed, setae dark brown basally, gradually yellowish toward apex. Sides of postclypeus almost glabrous. Labrum with abundant pubescence not obscuring integument on posterior 2/3, pubescence whitish close to anteclypeus, yellowish close to glabrous anterior third; anterior margin with fringe of golden setae; posterior 2/3 with long, erect setae interspersed, setae dark brown basally, gradually yellowish brown toward apex. Distance between upper eye lobes 0.14 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes superiorly 0.57 times distance between outer margins of eyes, 0.72 times inferiorly. Antennae 2.35 times elytral length, reaching elytral apex at basal third of antennomere VI. Reddish-brown region of scape with abundant light yellowish-brown pubescence partially obscuring integument dorsally and on superior region of sides, and abundant whitish pubescence partially obscuring integument on remaining surface; dark-brown region with abundant dark-brown pubescence partially obscuring integument; ventral surface with a few long, erect dark-brown setae. Pedicel with whitish pubescence basally, sparser on sides, and abundant dark brown pubescence on remaining surface; with a few long, erect dark-brown setae ventrally. Antennomeres III–XI with abundant whitish pubescence partially obscuring integument on orangish-brown area, and abundant dark-brown pubescence with short, decumbent whitish setae interspersed on dark-brown area; with short, erect yellowish-white setae interspersed throughout; antennomeres III–V with one long, erect blackish seta about middle of ventral surface, and a few long blackish setae directed backward on apex of ventral and dorsal surface; antennomeres VI–VII with one long blackish seta directed backward on ventral apex. Antennal formula based on length of antennomere III: scape = 0.91; pedicel = 0.09; IV = 0.84; V = 0.69; VI = 0.55; VII = 0.53; VIII = 0.51; IX = 0.45; X = 0.45; XI = 0.42.

Thorax. Pronotum with dense, longitudinal, wide brownish pubescent band centrally, from anterior to posterior sulcus; sides with dense, longitudinal, wide yellowish-white pubescent band, from anterior sixth to posterior margin, expanded and covering dorsal surface of lateral tubercle of prothorax, pubescence whiter posteriorly; with dense brownish pubescence on remaining surface of sides, and abundant brown pubescence not obscuring integument on remaining surface; with a few long, erect dark-brown setae on sides of posterior quarter. Sides of prothorax with dense brownish pubescence close to pronotum and dense whitish pubescence close to prosternum. Ventral surface of thorax with dense whitish pubescence. Scutellum with brownish pubescence not obscuring integument. Elytra. Somewhat abundantly, coarsely punctate on anterior quarter, punctures gradually finer and sparser on remaining surface, especially on posterior half; with dense white pubescence basally, not reaching suture, reaching epipleural margin, with longitudinal projection dorsally, reaching apex of anterior fifth, pubescence narrowed, more yellowish-white on humeral area; with narrow, longitudinal dense white pubescent band close to suture on anterior third; with transverse, wide, dense white pubescent band about middle, with their margins sinuous, expanded close to suture, reaching epipleural margin and almost reaching suture, where it forms three/four notches; anterior and central white pubescent areas fused along suture by white pubescent band with brownish pubescent spots interspersed; posterior third with irregular white pubescent macula starting close to suture, covering entire apex, reaching epipleural margin by transverse, somewhat narrow white pubescent projection on its anterior region; area close to suture, between central and apical white pubescent areas, with white pubescent spot; remaining surface with dense brownish pubescence; erect setae blackish. Legs. Femora with dense yellowish-white pubescence dorsally, except pubescent macula on metafemoral club, and dense white pubescence on remaining surface. Tibiae with dense whitish pubescence, except: apical third of dorsal and lateral areas of protibia with dense brown pubescence; apical half of ventral surface of protibiae with dense bristly pubescence, yellowish-brown close to middle, dark-brown on apical third; apical third of dorsal surface of mesotibiae with bristly dark-brown pubescence; sides of apical third of mesotibiae with yellowish-brown pubescence partially obscuring integument; apical quarter of ventral surface of mesotibiae with bristly yellowish-brown pubescence; and apical quarter of ventral surface of metatibiae with bristly yellowish-brown pubescence. Outer side of protibiae with a few long, erect blackish setae interspersed; meso- and metatibiae with sparse, short, suberect, thick blackish setae interspersed. Dorsal surface of tarsomeres I–II with abundant white pubescence partially obscuring integument; III with sparse whitish pubescence basally, pubescence almost absent apically; IV almost glabrous; V with somewhat abundant whitish pubescence basally, pubescence gradually sparser and yellowish-brown toward apex.

Abdomen. Ventral surface with dense whitish pubescence, pubescence sparser on posterior 2/3 of ventrite 5.

Dimensions (mm). Total length, 8.30; prothoracic length, 1.50; anterior prothoracic width, 1.50; posterior prothoracic width, 1.75; maximum prothoracic width, 2.20; humeral width, 2.80; elytral length, 5.30.

Type material. Holotype female from MEXICO, Veracruz:UNAM Field Station, Los Tuxtlas , 35km NE Catemaco, 23-24.IV.1991, F.T. Hovore leg. ( CASC, formerly LGBC).

Etymology. The species is dedicated to the late Frank T. Hovore, collector of the holotype. Frank was an indefatigable collector who believed in what he called “legacy” collecting, getting to as many places as possible, collecting as much as possible to provide material for future study, after a researcher’s field work is no longer conducted. The holotype specimen is part of his legacy, and we are grateful to have studied it.

Remarks. The elytral pubescent pattern of C. hovorei new species facilitates its recognition among the American species of Acanthocinini .

The elytral pubescent pattern of Chicanatonus hovorei new species is practically identical to that of Colobothina perplexa Hovore, 1989 (Colobotheini) . Although we examined only one specimen of C. perplexa from Costa Rica, we cannot be sure if this species really belongs to Colobotheini . However, C. perplexa differs by the prothorax without lateral tubercles (distinct in C. hovorei new species) and elytra with humeral carina (absent in C. hovorei new species).

CALLIINI Thomson, 1864

Figures

Figures 20–25. Chicanatonus hovorei, new genus, new species, holotype female. 20) Dorsal habitus. 21) Ventral habitus. 22) Lateral habitus. 23) Head, frontal view. 24) Ventrite 5. 25) Last tergite.

Figures 26–34. Acanthocinini. 26–28) Metatarsus. 26) Chicanatonus hovorei, new genus, new species, holotype female. 27) Antecrurisa apicalis (Bates, 1864), female from Mexico (Quintana Roo). 28) Graphisurus vexillaris (Bates, 1872), male from Costa Rica. 29–32) Antecrurisa apicalis. 29) Male from Guatemala (Suchitepequez), frontal view. 30) Female from Mexico (Quintana Roo), profemur and protibia. 31) Female from Mexico (Quintana Roo), last tergite. 32) Female from Mexico (Quintana Roo), ventrite 5. 33–34) Graphisurus vexillaris (Bates, 1872), female from Costa Rica. 33) Last tergite. 34) Ventrite 5.