Oxylymma surinamensis Wappes and Santos-Silva, 2019

Wappes, James E. & Santos-Silva, Antonio, 2019, Descriptions of one new genus and seven new species of Rhinotragini (Coleoptera: Cerambycidae: Cerambycinae), Insecta Mundi 695, pp. 1-19 : 5-7

Oxylymma surinamensis Wappes and Santos-Silva , new species

( Fig. 10–13 )

Description of female holotype. Frons, anterior area of antennal tubercles, genae and ventral surface of head yellowish-brown marbled with light reddish-brown in some areas; area between posterior margin of antennal tubercles and posterior constriction of head, and area close to posterior ocular edge, light reddish-brown; dorsal surface of head close to prothorax and remaining surface behind eyes reddish-brown; mandibles mostly yellowish-brown, with black apex; scape brown with some irregular reddish-brown areas; pedicel and antennomeres III–VI dark brown; antennomere VI mostly dark brown, with part of dorso-basal area yellowish; antennomeres VII–XI dark brown except yellowish basal area; pronotum and sides of prothorax orange except dark reddish-brown narrow anterior area, and posterior area marbled with reddish-brown; prosternum yellowish except yellowish-brown anterior area; ventral surface of meso- and metathorax and coxae pale yellow; elytra pale yellow marbled with yellowish-brown in some areas, except brownish punctures in anterior 3/4, black band close to humerus in anterior quarter, narrowed apically, dark brown band along suture in anterior 2/3, and dark brown semielliptical band dorsolaterally about middle; femora pale yellow basally, light yellowish-brown in remaining area; tibiae mostly light yellowish-brown, slightly darker toward apex; tarsi mostly yellowish-brown; abdominal ventrites mostly pale yellow.

Head. Anterior area of head forming distinct rostrum. Frons coarsely, moderately sparsely punctate (some punctures partially confluent); with a few long, erect yellowish setae. Vertex, from antennal tubercles to posterior constriction, coarsely, abundantly, confluently punctate; remaining surface with punctures distinctly finer, abundant, not confluent; with sparse, moderately short, erect yellowish setae in area with confluent punctures, glabrous on remaining surface. Area behind upper eye lobes with sculpturing and setae as on vertex. Area behind and close to lower eye lobes tumid, striate toward upper eye lobe, punctate toward ventral surface, transversely striate close to prothorax; with minute, sparse yellowish setae in tumid area, glabrous in remaining area. Antennal tubercles nearly contiguous, smooth, glabrous. Genae 1.5 times length of lower eye lobe, moderately coarsely, abundantly punctate, with sparse, minute yellowish setae and a few moderately long, decumbent yellowish setae. Median groove distinct from middle of frons to area between upper eye lobes. Postclypeus nearly smooth, with one long yellowish-brown seta on each side of wide central area. Gulamentum smooth, glabrous close to prothorax, coarsely, abundantly, confluently punctate in wide central area, finely, transversely stri- ate anteriorly; with sparse, short, erect yellowish setae in wide anterior area. Upper eye lobes rounded posteriorly, gradually narrowed toward apex, forming acute angle with anterior margin; distance between upper eye lobes 1.23 times length of scape; in frontal view, distance between lower eye lobes 1.10 times length of scape. Antennae 0.75 times elytral length, reaching about apex of anterior third of elytra. Scape finely, sparsely punctate, gradually widened toward apex, in side view curved at about posterior third; with sparse, short and long, erect yellowish-brown setae. Pedicel and antennomere III nearly cylindrical, slightly widened toward apex, with sparse, decumbent, brownish and whitish setae dorsally and long, erect, brownish setae ventrally; antennomeres IV–XI nearly forming distinct clave, with suberect brownish and yellowish setae dorsally; antennomeres IV–VII distinctly widened toward apex, with long, erect brownish setae ventrally, gradually sparser toward VII; antennomeres VIII–X about as wide basally as apically; antennomere XI distinctly narrowed from midlength. Antennal formula (ratio) based on length of antennomere III: scape = 0.76; pedicel = 0.32; IV = 0.41; V = 0.48; VI = 0.33; VII = 0.33; VIII = 0.24; IX = 0.24; X = 0.20; XI = 0.33.

Thorax. Prothorax slightly wider than long, with distinct basal and distal constriction; posterior margin slightly sinuous; sides gradually divergent from anterolateral angles to before middle, then distinctly widened toward posterior constriction (tubercle-shaped). Pronotum distinctly elevated, convex centrally in anterior half, gradually declivous toward flat, narrow posterior area; coarsely, abundantly punctate except nearly smooth area on each side under lateral widened area, and anterocentral area with sparse punctures; with a few moderately long, erect yellowish setae posteriorly. Sides of prothorax coarsely, moderately abundantly punctate (some punctures slightly finer than on pronotum). Prosternum coarsely, shallowly striate-punctate except only striate in anterior darker area; with a few short, erect yellowish setae on striate-punctate area. Narrowest area of prosternal process about 5.5 times narrower than procoxal cavity; apex cordiform. Ventral surface of meso- and metathorax with yellowish-white pubescence not obscuring integument, denser laterally. Scutellum nearly glabrous.

Elytra. Sides slightly, gradually narrowed from humerus to posterior fifth, then roundly narrowed toward apex; sutural margins slightly, gradually divergent from apex of anterior third, stronger in posterior third; apex forming acute angle; each elytron with 3 distinct carinae, innermost less elevated, placed near suture, from base to posterior third, central one placed dorsally, and another at humerus, both starting at base, fused at distal fifth of elytra, ending at apex; coarsely, abundantly punctate, punctures coarser, partially confluent laterally; with a few short, erect yellowish setae laterally in posterior area. Legs. Femora pedunculate-clavate; with a few long, erect yellowish setae. Tibiae with moderately long, erect yellowish setae throughout, and short, erect moderately abundant yellowish setae posteriorly (slightly darker than long setae), distinctly denser ventrally.

Abdomen. Ventrites I–III with a few short, erect yellowish-white setae, slightly longer laterally on II–III; ventrites IV–V with sparse, moderately long, erect yellowish-white setae; apex of ventrite V truncate.

Dimensions (mm). Total length 10.05; prothoracic length 1.80; anterior prothoracic width 1.35; posterior prothoracic width 1.95; maximum prothoracic width 2.05; humeral width 2.60; elytral length 6.40.

Type material. Holotype female from SURINAME, Sipaliwini : Raleighvallen Nature Reserve, 16.VII.1998, S. Boinski et al. col. ( FSCA).

Remarks. Oxylymma surinamensis sp. nov. ( Fig. 10–13 ) is similar to O. sudrei Peñaherrera and Tavakilian, 2003 and O. pallida Santos-Silva, Bezark, and Martins, 2012 , but differs as follows: vertex and pronotum without dark bands; elytra with longitudinal dark bands; elytral apex not distinctly acute. In O. sudrei and O. pallida the vertex and pronotum have distinct dark bands, elytra have strongly sinuous transverse dark bands, and the elytral apex is distinctly acute. It also differs from O. lepida Pascoe, 1859 by the elytra lacking transverse dark bands (two in O. lepida ) and elytral apex not distinctly acute (noticeably acute in O. lepida ).

Etymology. Named after Suriname, the South American country where the holotype and only known specimen was collected.

Figures

Figures 10–17. 10–13) Oxylymma surinamensis new species, holotype female: 10) Dorsal habitus. 11) Ventral habitus. 12) Lateral habitus. 13) Head, frontal view. 14–17) Paraeclipta albopilosa new species, holotype male: 14) Head, frontal view. 15) Dorsal habitus. 16) Ventral habitus. 17) Lateral habitus.