Coleoxestia eyai, Santos-Silva & Wappes, 2017

Santos-Silva, Antonio & Wappes, James E., 2017, Six new species and a new country record of Coleoxestia Aurivillius, 1912 (Coleoptera, Cerambycidae, Cerambycinae), Insecta Mundi 2017 (572), pp. 1-19 : 4-5

Coleoxestia eyai sp. nov.

( Fig. 9–12 )

Description. Holotype male. Head, thorax, scape, pedicel and antennomere III dark brown, almost black; mouthparts dark reddish brown, lighter near apex of palpomeres; antennomeres IV–XI gradually from dark brown to brown; elytra dark brown with margins black; femora dark brown on base, part of superior and inferior margin of peduncle, and distal third of club (the latter not abruptly darkened), reddish brown on remainder; protibiae entirely dark brown; mesotibiae dark brown, with reddish brown band on outer side of distal half; metatibiae dark brown, with reddish brown band on outer side of distal 3/4; tarsomere I dark brown in basal 3/4, reddish brown on remaining surface; tarsomeres II–V mostly reddish brown; ventrites dark brown, with transverse yellowish-brown band at apex of ventrites I–IV (wider toward ventrite IV).

Head. Frontal plate not well-delimited toward antennal tubercles, finely, densely, confluently punctate, except for smooth longitudinal band; with short, sparse, sub-erect setae. Frontolateral depression with sculpture and setae as on frontal plate. Area between antennal tubercles and middle of upper eye lobes with wide, smooth, glabrous carina; area between carina and upper eye lobes finely, confluently punctate, with short, sparse, erect setae, distinctly longer close to eyes. Remaining surface of vertex coarsely punctate, except for smooth central area and striate-punctate region close to prothorax; with short and minute, sparse setae. Epicranial suture distinct from middle of frontal plate to base of antennal tubercles. Area behind upper eye lobes coarsely, abundantly punctate (punctures confluent, oblong, longitudinal close to eye, striate-punctate close to prothorax); with short and long setae close to eye, glabrous on remaining surface. Area behind lower eye lobes tumid, sulcate close to eye; sulcate area coarsely, confluently punctate; remaining surface finely, sparsely punctate toward upper eye lobes, smooth toward ventral surface; tumid area with short and long, moderately abundant setae; remaining surface glabrous. Antennal tubercles coarsely punctate, except for superior area finely, sparsely punctate; with short, sparse setae in coarsely punctate region, glabrous in superior area. Genae finely, sparsely punctate; with short, sparse setae, interspersed with some long, erect setae ventrally. Submentum minutely, moderately abundantly punctate, interspersed with coarse, confluent, shallow punctures toward gula; with short, erect, moderately abundant setae interspersed with long, erect setae. Postclypeus finely, sparsely punctate centrally (punctures denser on sides of this region), smooth laterally; with short, erect, sparse setae interspersed with long, erect setae in punctate area, glabrous in smooth area. Labrum coplanar with clypeus, except for depressed center of distal region; with short setae interspersed with long setae laterally, more abundant in depressed area. Distance between upper eye lobes 0.3 times length of scape; distance between lower eye lobes in frontal view 0.6 times length of scape. Antennae 1.5 times elytral length, reaching elytral apex at basal third of antennomere XI. Scape coarsely, densely, confluently punctate basally, gradually finer, sparser toward smooth apex, coarsely rugose ventrally; with short, sparse setae, ventrally interspersed with long, erect, sparse setae. Antennomere III with long, erect setae laterally and ventrally; apex nodose-flattened. Antennomere IV with setae as on III, but sparser; apex nodose-flattened, but outer margin not abruptly enlarged. Antennomere V with apex semi-angulose. Antennomeres VI–X with apex ortho-angulose. Antennomere XI not divided; greatest width 0.1 times its length. Antennal formula (ratio) based on antennomere III: scape = 0.68; pedicel = 0.15; IV = 0.60; V = 0.68; VI = 0.65; VII = 0.60; VIII = 0.60; IX = 0.64; X = 0.61; XI = 1.07.

Thorax. Prothorax slightly wider than long (greatest width 1.1 times length); lateral tubercles slightly distinct; sides of prothorax coarsely, confluently punctate, gradually sparser, slightly finer toward ventral side; with short, sparse setae interspersed with long, erect setae. Pronotum with peripheral sulcus, mainly centrally, ill-marked; fusiform plate ill-marked; surface with five low, poorly delimited gibbosities, two anterolateral most distinct; area between anterior and posterior constrictions smooth centrally, mainly on longitudinal gibbosity of basal half, coarsely, abundantly punctate on sides of longitudinal gibbosity, finely, sparsely punctate on sides of smooth central area at distal half and area closer to peripheral sulcus (finer, more abundant in latter area), plicate-punctate on and between lateral gibbosities, plicate between anterolateral gibbosity and punctate area closer to peripheral sulcus, coarsely, densely, confluently punctate laterally; with short, sparse setae in plicate and punctate regions, interspersed with long, erect setae in basal third laterally. Prosternum coarsely, abundantly punctate laterally in inclined region, gradually sparser toward center; finely, sparsely punctate between middle and peripheral sulcus; with short and long, moderately abundant setae in inclined region, distinctly sparser toward center; with short, sparse setae between middle and peripheral sulcus, interspersed with a few long, erect setae. Prosternal process centrally smooth, slightly carinate, laterally coarsely, densely punctate, except for entirely smooth apex. Mesoventrite, mesepimeron and mesepisternum with abundant short, decumbent, setae, distinctly sparser in central and lateral areas of mesoventrite. Mesoventral process without tubercle. Metepisternum with short, abundant, decumbent setae. Metaventrite with short, decumbent, sparse setae, slightly denser laterally, distinctly denser close to metacoxal cavity, interspersed with long, erect, sparse setae; surface finely, sparsely punctate. Scutellum with short, sparse setae laterally (dense on lateral margin), smooth centrally. Elytra. Shining, moderately coarsely, abundantly punctate (punctures slightly finer, sparser toward apex); with minute, sparse setae in distal quarter, interspersed with long, sub-erect, sparse setae; apex bispinose. Legs. Femora fusiform, finely, sparsely punctate (rugose on base of ventral side of profemora); apices of meso- and metafemora with rounded lobe. Metatibiae not sulcate laterally.

Abdomen. Ventrites with short, spare setae (distinctly more abundant laterally, on ventrites I–V and distally on ventrite V) interspersed with long, erect, sparse setae; distal quarter of ventrite V inclined; distal margin of ventrite V widely concave.

Dimensions in mm (holotype female). Total length 26.10; length of prothorax at center 4.30; greatest width of prothorax 4.60; anterior width of prothorax 3.55; posterior width of prothorax 4.30; humeral width 6.30; elytral length 19.05.

Type material. Holotype male from PERU, Ucayali: Tingo Maria – Pucallpa Rd. (km 205; Puente Chino, 1300 m; 09º08.2’S / 75º47.3’W), 13.X.1999, D. Brzoska col. ( FSCA).

Etymology. Named for Bryan K. Eya to recognize his many contributions (including Coleoxestia paper) to the taxonomy of New World Cerambycidae .

Remarks. Coleoxestia eyai sp. nov. differs from all other species of the genus by the elytra being moderately coarsely, abundantly punctate.

Figures

Figures 4–16. 4–8, Coleoxestia clarkei sp. nov.: 4) Holotype female, dorsal habitus. 5) Holotype female, ventral habitus. 6) Holotype female, lateral habitus. 7) Paratype male, dorsal habitus. 8) Holotype female, head. 9–12, C. eyai sp. nov., holotype male: 9) Dorsal habitus. 10) Ventral habitus. 11) Lateral habitus. 12) Head. 13) C. chemsaki sp. nov., holotype male, metatarsus. 14) C. aurigena, holotype female, metatarsus. 15) C. femorata, male, antennomere III. 16) C. chemsaki sp. nov., holotype male, antennomere III.