Oncideres eraeini Nearns and Nascimento, 2019

Nearns, Eugenio H. & Nascimento, Francisco E. de. L., 2019, A new genus and seven new species of Onciderini Thomson, 1860 (Coleoptera: Cerambycidae: Lamiinae) from Central and South America, Insecta Mundi 688, pp. 1-16 : 10-11

Oncideres eraeini Nearns and Nascimento , sp. nov.

( Figures 3 e–h)

Description. Female. Length 24.5 mm (measured from vertex to elytral apices), width 7.3 mm (measured across humeri). Habitus as in Fig. 3f . General form elongate-oblong, moderately sized. Integument mostly black; anteclypeus brownish, with darker irregular areas; labrum dark brown basally, almost black, gradually lighter toward apex. Pubescence ochraceous (slightly lighter in some areas), mostly nearly obscuring integument, except small white pubescent spots in distal two-thirds of elytra.

Head. In dorsal view, anterior area of head slightly concave. Frons transverse, slightly wider than 3.5 times lower eye lobes. Eyes with lower lobes moderately sized, oblong; narrowest area connecting upper and lower eye lobes about three ommatidia wide. Gena about 0.75 times as tall as lower eye lobes. Distance between upper eye lobes 0.70 times length of scape (4.15 times maximum width of one upper eye lobe); in frontal view, distance between lower eye lobes 1.10 times length of scape. Antennal tubercles widely separated, unarmed at apex. Antennae 1.4 times elytral length, reaching elytral apex at distal quarter of antennomere X; scape gradually widened toward apex, not clavate, with short, erect, sparse dark-brown setae ventrally; antennomeres not curved; antennomeres III–V with short fringe of darkbrown setae (slightly sparser toward V); remaining antennomeres with short, erect, sparse dark setae ventrally (gradually sparser toward XI). Antennal formula based on antennomere III: scape = 0.78; II = 0.13; IV = 0.75; V = 0.64; VI = 0.60; VII = 0.58; VIII = 0.52; IX = 0.52; X = 0.52; XI = 0.41.

Thorax. Prothorax roughly conical, transverse, 2.0 times as wide as long (including lateral tubercles), slightly wider at apex; lateral tubercles large, conical, with blunt apex, placed at basal half, pubescent basally, glabrous distally. Pronotum with basal margin slightly sinuous and distal margin concave; disk with transverse, slightly sinuous carina near middle, more protuberant laterally, glabrous except moderately sparse pubescence close to protuberant area; distal transverse sulcus wide, moderately deep. Scutellum transverse, apex rounded, longitudinally glabrous centrally. Elytra about 1.9 times as long as width at humeri, about 5.0 times as long as pronotal length, about 1.4 times broader basally than prothorax at its widest (at tubercles); humeri prominent, keel-shaped, nearly glabrous, not tuberculate; lateral margins slightly, gradually narrowed from humerus to about distal third, gradually rounded to apex at apical third; apex jointly rounded; basal third with scattered, small to medium-sized glabrous tubercles. Basal area of prosternal process distinctly narrower than procoxal cavity. Mesosternal process slightly narrower than mesocoxal cavity; apex bilobed. Legs. Short; femora robust, not rugose; pro- and mesofemora fusiform; metafemora clavate; tibiae slightly, gradually expanded toward apex; metatarsomere V slightly longer than I–III combined.

Male. Unknown.

Type material. Holotype ( Fig. 3 e–h) male from PERU, Junín: Pampa Hermosa Lodge , 1-6.IV.2011, J. B. Heppner and C. Carrera col. ( NMNH).

Etymology. This species is named in honor of Terry Lee Erwin, senior curator of Coleoptera at the NMNH, in recognition of his many contributions to the study of Neotropical beetles. The epithet is a noun in the genitive case.

Diagnosis and remarks. This species resembles O. apiaba Martins, 1981 , but differs as follows: in dorsal view, anterior area of the head slightly concave; distance between upper eye lobes shorter than length of the antennomere IV; elytra with white pubescent spots; sutural angle of the elytra not projected; basal area of the prosternal process distinctly narrower than a procoxal cavity. In O. apiaba , in dorsal view, anterior area of the head is nearly straight, distance between upper eye lobes is larger than length of the antennomere IV, elytra lacks white pubescent spots, sutural angle of the elytra is slightly projected, and basal area of the prosternal process is about as wide as a procoxal cavity. It differs from O. germarii Thomson, 1868 especially by the white pubescent spots on the elytra larger and scattered (minute and very abundant in O. germarii ). Oncideres eraeini can be separated from O. satyra Bates, 1865 and O. fulƲa Bates, 1865 by the absence of white pubescence on ventral side of the thorax (present in those two species). The new species differs from O. diringsi Martins and Galileo, 1990 especially by the humeri keel-shaped (not so in O. diringsi ), and from O. albopicta Martins and Galileo, 1990 by the white pubescent spots of the elytra scattered (distinctly abundant in O. albopicta ).

Figures

Figure 3. Two new species of Oncideres. a–d) Oncideres antonkozloƲi sp. nov., holotype male: a) Dorsal habitus. b) Ventral habitus. c) Lateral habitus. d) Close-up of head. e–h) Oncideres eraeini sp. nov., holotype female: e) Close-up of head. f) Dorsal habitus. g) Ventral habitus. h) Lateral habitus.