Osckayia obrieni, Bezark & Santos-Silva, 2022

Bezark, Larry G. & Santos-Silva, Antonio, 2022, New genus and new species in American Apomecynini (Coleoptera, Cerambycidae, Lamiinae), Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 62, pp. 1-9 : 3-5

Osckayia obrieni sp. nov.

( Fig. 2 )

Description

Holotype female: Integument mostly blackish; ventral mouthparts dark reddish brown,except yellowish-brown apex of palpomeres; antennae dark brown, except dark reddish-brown base of antennomeres III-XI. Tarsi reddish brown. Apex of abdominal ventrites 1-4 yellowish brown.

Head: Frons coarsely, abundantly punctate; with abundant yellowish-brown pubescence not obscuring integument, slightly denser close to eyes, with a few short, erect brownish setae interspersed laterally, and one long, erect brownish seta on each side close to eyes; with a few short, decumbent, thick whitish setae interspersed. Antennal tubercles finely, abundantly punctate; with abundant yellowish-brown pubescence not obscuring integument, pubescence longer and denser than on frons. Area between antennal tubercles and upper eye lobes distinctly depressed; coarsely, abundantly punctate; with yellowish-brown pubescence not obscuring integument, denser laterally. Remaining surface of vertex and area behind upper eye lobes, coarsely, abundantly punctate; with yellowish-brown pubescence not obscuring integument on vertex, partially obscuring area behind eye. Area behind lower eye lobes tumid close to eye; tumid area coarsely, sparsely punctate, with yellowish-brown pubescence not obscuring integument; remaining surface coarsely punctate, almost glabrous. Genae 0.7 times width of lower eye lobe; finely somewhat striate-punctate; with yellowish-brown pubescence, denser close to eye, and a few whitish setae interspersed, except glabrous apex. Wide central area of postclypeus with bristly yellowish-brown pubescence not obscuring integument, a few moderately long, erect yellowish-brown setae interspersed, and one distinctly long, erect yellowish-brown seta on each side. Sides of postclypeus glabrous. Labrum finely, densely punctate about posterior half, smooth on remaining surface; with long, sparse yellowish-brown setae directed forward on punctate area, slightly more abundant laterally, glabrous on smooth area, except fringe of golden setae on anteri- or margin. Distance between upper eye lobes 0.27 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.59 times distance between outer margins of eyes.Antennae 1.45 times elytral length, reaching elytral apex at middle of antennomere XI. Scape with yellowish-brown pubescence not obscuring integument, and decumbent, thick white setae interspersed. Pedicel with yellowish-white pubescence on anterior half, yellowish-brown on posterior half, both not obscuring integument. Antennomeres III-XI with yellowish-white pubescence basally, yellowish-brown, not obscuring integument, on remaining surface; antennomeres III-VII with short, decumbent, thick white setae interspersed, and long, erect yellowish-brown setae ventrally, gradually shorter and sparser toward XI. Antennal formula based on length of antennomere III: scape = 0.85; pedicel = 0.22; IV = 1.26; V = 0.70; VI = 0.63; VII = 0.55; VIII = 0.52; IX = 0.50; X = 0.44; XI = 0.52.

Thorax: Prothorax wider than long; lateral tubercles large, conical, located slightly after middle. Pronotum coarsely, abundantly punctate; with four moderately elevated gibbosities, one central, carina-shaped, located on anterior half, one on each side just before middle, subcircular, another located centrally beyond middle, wide, somewhat elongate and slightly obliquely project- ed toward anterolateral gibbosities; with abundant yellowish-brown pubescence not obscuring integument, sparser on gibbosities, slightly denser laterally, and a few short, decumbent, thick white setae interspersed. Sides of prothorax coarsely, abundantly punctate; with abundant yellowish-brown pubescence not obscuring integument. Prosternum coarsely, somewhat abundantly punctate; with yellowish-white pubescence not obscuring integument. Prosternal process coarsely punctate; narrowest area 0.24 times procoxal width; with yellowish-white pubescence not obscuring integument, longer than on prosternum. Mesoventrite coarsely, sparsely punctate centrally; with sparse yellowish-brown pubescence centrally, with dense yellowish-brown pubescence laterally. Mesanepisternum coarsely, abundantly punctate; with dense yellowish-brown pubescence, and short, decumbent, thick white setae interspersed. Mesepimeron with dense yellowish-brown pubescence. Metanepisternum and sides and posterior area of metaventrite with dense yellowish-brown pubescence, and short, decumbent, thick white setae interspersed; remaining surface of metaventrite somewhat sparsely yellowish-white pubescent. Mesoventral process longitudinally sulcate centrally, strongly emarginate apically; apex 0.45 times mesocoxal width. Scutellum with abundant yellowish pubescence partially obscuring integument, except dense yellow pubescence on margins. Elytra: Coarsely, abundantly punctate on anterior half, punctures finer, gradually sparser on posterior half; with slightly elevated, longitudinal centrobasal crest; slightly, irregularly longitudinally carinate on basal half; with dense dark yellowish-brown pubescence almost obscuring integument, irregular areas with light yellowish-white pubescence interspersed, and short, decumbent, white setae interspersed. Legs: Femora with abundant dark yellowish-brown pubescence not obscuring integument, yellowish pubescence apically, with short, decumbent, thick white setae interspersed. Tibiae with yellowish-white pubescence not obscuring integument, more yellowish-white on some areas, with short, decumbent, thick white setae interspersed, except posterior ⅔ of ventral surface of protibiae, and posterior third of dorsal and ventral surfaces of meso- and metatibiae with bristly, thick, abundant yellowish-brown setae. Metatarsomere I shorter than II-III together.

Abdomen: Ventrites with abundant yellowish-brown pubescence not obscuring integument, more abundant laterally, with short, decumbent, thick white setae interspersed. Posterocentral area of ventrite 5 deeply depressed.

Dimensions (mm): Total length, 8.20; prothoracic length, 1.80; anterior prothoracic width, 1.85; posterior prothoracic width, 1.90; maximum prothoracic width, 2.40; humeral width, 3.00; elytral length, 6.00.

Type material: Holotype ♀ from MEXICO, Hidalgo: Hwy 105, 2.7 mi. N Tlanchinol, 5000’, 02.VIII.1982, C.W. O’Brien & Wibmer leg. ( CASC, formerly LGBC).

Etymology: The species is named in honor of the late Charlie O’Brien, curculionid specialist in recognition for his contributions to taxonomic entomology, and willingness to provide material to the first author.

Remarks: Some features reported as generic turned out to be specific features of O. oaxacae Pérez-Flores & Santos-Silva, 2021 . For example: the distance between upper eye lobes being greater than three times the width of one upper lobe (distinctly shorter in the new species); the lower eye lobes being about as long as the genae (longer in the new species); the antennae being longer than the body (about as long as the body in the new species) and the mesoventral process being longitudinally carinate (longitudinally sulcate in the new species); the elytra being granulate basally (not granulate in the new species). The antennal length is probably related to the sex. However, as only males of O. oaxacae are known and only a female of the new species is known, for now it is not possible to know the antennal length in the opposite sex of these species. Osckayia obrieni sp. nov. also differs from O. oaxacae by the elytra not having oblique dark bands contrasting with the remaining pubescence (oblique bands present in O. oaxacae ).

Figures

Figure 2. Osckayiaobrienisp.nov.,holotypefemale:(A)Dorsalhabitus;(B)Ventralhabitus;(C)Lateral habitus;(D)Head,frontalview;(E)Pronotum,dorsolateralview.