Oideterus inaequalis, Galileo, Maria Helena M. & Santos-Silva, Antonio, 2015

Galileo, Maria Helena M. & Santos-Silva, Antonio, 2015, New species of Oideterus Thomson (Coleoptera, Cerambycidae, Prioninae, Anacolini) and notes on O. lobicollis, Zootaxa 4020 (2), pp. 397-400 : 397-399

Oideterus inaequalis sp. nov.

( Figs. 1–4 )

Udeterus lobicollis ; Galileo, 1987: 559, figs. 806, 813, 823, 825, 837, 846, 850, 856, 865, 875, 880, 893.

Female. General integument reddish-brown, except for orangish-brown legs and part of elytra (base, lateral sides of basal half, margins, and suture). Punctures sub-coarse, dense; coarser, denser on elytra; pronotal disc with impunctate gibbosities; area under pronotal spine punctate; metasternum, legs, antennae, and abdomen very finely, sparsely punctate (mainly on the latter). Setae yellowish, moderately abundant, long; elytra with very sparse setae on base; antennae glabrous.

Head. Width equal to 1.5 times length. Distance between antennal tubercles equal to 3.0 times diameter of scape. Distance between upper eye lobes equal to 1.7 times largest width of scape; distance between lower eye lobes equal to 3.6 times largest width of scape. Length of upper eye lobe equal to 0.9 times largest width of scape. Genae 0.5 times as long as largest width of lower eye lobe. Maxillary palpomere IV as long as II, 2.3 times as long as I, 1.3 times as long as III. Labial palpomere III 2.3 times as long as I, 1.4 times as long as II. Antennae surpass elytral apex at base of antennomere X; antennomeres, from V, with projection at inner apex from short and rounded to sub-acute and elongate, distinctly longer towards antennomere X (apex of projection at most reaches basal third of next antennomere); antennal formula (ratio) based on antennomere III (excluding projections of antennomeres V–X): scape = 0.39; pedicel = 0.12; IV = 0.82; V = 0.71; VI = 0.61; VII = 0.49; VIII = 0.36; IX = 0.36; X = 0.33; XI = 0.6; outer side of antennomeres, from distal third of III, carinate; inner side of antennomere XI carinate. Dorsal and ventral outer surface of antennomeres with poriferous system; on III and IV placed only at distal third and small poriferous punctures close to margin; on V and VI placed at base and apex, with poriferous punctures between them; on VII as on VI, but on large areas (pits sub-adjacent); on antennomeres VIII–XI placed along all outer half, with poriferous punctures at apex of inner half (on ventral surface gradually occupying larger areas eventually extending to entire inner half of X–XI).

Thorax. Pronotum 2.1 times wider than long; lateral side strongly oblique from anterolateral angle to spine; disc with lateral gibbosities fused, integument partially smooth. Scutellum 1.4 times wider than long; moderately coarsely, abundantly punctate, except for wide central longitudinal band on basal half. Prosternum 0.4 times as long as prosternal process. Prosternal process triangular; length equal to 1.9 times width, and 2.1 times diameter of scape; covering basal half of mesosternal process. Mesosternal process 1.2 times wider than long; margins slightly narrowed towards apex.

Elytra. Reaching posterior margin of ventrite IV; dehiscent, more distinctly from posterior quarter; carinae absent.

Legs. Metafemora short, reaching posterior margin of ventrite III. Pro- and mesotarsomere I 1.5 times longer than II, 1.2 times longer than III; V 2.2 times longer than I; spongy setal pad on tarsomeres I–III. Metatarsomere I 1.6 times longer than II, 1.5 times longer than III; V 1.4 times longer than I; spongy setal pad on tarsomeres I–III.

Abdomen. Ventrite IV 4.8 times wider than long; ventrite V 3.7 times wider than long; ventrite IV and V with subequal length; ventrite V sub-trapezoidal, with distal margin sub-straight, slightly emarginate centrally.

Dimensions in mm. Total length, 16.8; length of head, 2.3; with of head, 3.5; length of pronotum, 3.0, width of pronotum, 6.2; elytral length, 13.0; elytral width, 7.2.

Type material. Holotype female, ECUADOR: Baron (no date and collector indicated) ( MZSP).

Remarks. The above description, except for a few modifications, is a translation of the redescription of Udeterus lobicollis in Galileo (1987).

The study of photograph of the holotype of Temnesthes lobicollis Bates, 1875 ( Fig. 5 ) showed clearly that Udeterus lobicollis sensu Galileo (1987) does not agree with Bates’ species ( Temnesthes Bates, 1875 , and Udeterus Thomson, 1858 = Oideterus Thomson, 1857 ). The distribution of O. lobicollis is restricted to Colombia and the record from Ecuador is excluded.

Oideterus inaequalis sp. nov. ( Fig. 1 ) differs from O. lobicollis ( Fig. 5 ) as follows (females): prothorax distinctly wider; elytra longer, distinctly less dehiscent along suture; metatarsomere I ( Fig. 4 ) distinctly tumid. In O. lobicollis the prothorax is narrower, the elytra are proportionally shorter and strongly dehiscent along suture, and the metatarsomere I ( Fig. 5 ) is not tumid.

Etymology. Latin, inaequalis = unequal, different; allusive to the differences from O. lobicollis .

Figures

FIGURES 1 – 5. 1 – 4, Oideterus inaequalis sp. nov., holotype female: 1, Dorsal habitus; 2, Ventral habitus; 3, Lateral habitus; 4, Metatarsus, lateral view. 5, Temnesthes lobicollis Bates, 1875, holotype female, dorsal habitus.