Eranina amaura, Santos-Silva & Botero & Pérez-Flores, 2024

Santos-Silva, Antonio, Botero, Juan Pablo & Pérez-Flores, Oscar, 2024, New species, new geographical records and taxonomical notes on North and Central American Cerambycidae and Disteniidae (Coleoptera, Chrysomeloidea), Contributions to Entomology 74 (2), pp. 199-216 : 199-216

Eranina amaura sp. nov.

Figs 29–33

Type material.

Holotype female from GUATEMALA • Baja Verapaz: Pantin to Salamanca road , 15°14.57'N, 90°16.98'W, day, sweeping, beating & gleaning, 7. X. 2007, W. B. Warner leg. ( FSCA, formerly FWSC).

Etymology.

The specific epithet “ amaura ” is derived from the Greek amauros (dark, dim, obscure), alluding to the general coloration of the species.

Differential diagnosis.

Eranina amaura sp. nov. is similar to E. pectoralis ( Bates, 1881) and E. pusilla (Bates, 1874) (it is possible that these two last species are synonyms), but differs by: head mostly black; scape reaching about middle of pronotum; metanepisterna, mesepimera, and metanepisterna mostly with abundant dark-brown pubescence; meso- and metafemora mostly black; tibiae black basally. In E. pectoralis (Figs 38 , 39 ) and E. pusilla , the head is mostly orangish, scape distinctly surpassing middle of pronotum, metanepisterna, mesepimera, and metanepisterna have dense whitish or yellowish pubescence, meso- and metafemora yellowish or orangish, and tibiae yellowish or orangish basally. Eranina amaura sp. nov. differs from E. florula ( Bates, 1881) (Figs 34 , 35 ) by the dense light pubescence on the pronotum not reaching the posterior margin centrally (reaching in E. florula ), and sides of metanepisterna, mesepimera, and metanepisterna without dense white pubescence (present in E. florula ). The new species is also similar to E. sororcula Galileo & Martins, 2013 (Figs 40 , 41 ) but differs (females) by the body slender (distinctly stouter in E. sororcula ), dense yellowish pubescence on the pronotum not reaching the posterior margin centrally (reaching in E. sororcula ), dark area on the posterior region of the pronotum reaching the middle (not reaching in E. sororcula ), and elytra dark brown (brown or light brown in E. sororcula ), and tarsomeres V dark (orangish in E. sororcula ); also differs from E. leuconoe ( Bates, 1881) (Figs 36 , 37 ) by the metanepisterna, mesepimera, and metanepisterna mostly with abundant dark-brown pubescence (dense white pubescence in E. leuconoe ), and by the elytral apex rounded (truncate, with outer angle slightly projected in E. leuconoe ).

Description.

Holotype female. Head black, except brownish anterior margin of postclypeus, entire anteclypeus, and mostly of anterior third of labrum, brown central area of vertex, brown large area behind upper eye lobes; ventral mouthparts brown except blackish maxillary palpomeres IV and labial palpomeres III; scape, pedicel, basal third and apical region of antennomere III, and apex of antennomeres IV – VI black; remaining basal half of III reddish brown and remaining posterior half orangish brown; remaining surface of IV – VI orangish brown; base of VII reddish brown and remaining surface blackish; VIII – XI blackish. Prothorax light brown, except two large black maculae on posterior half, fused close to posterior margin of pronotum, rounded on their anterior margin on pronotum, gradually narrowed on sides of prothorax, two small, irregular blackish maculae on each side close to anterior margin of pronotum, and blackish on postcoxal process, prosternum and prosternal process. Ventral surface of meso- and metathorax black. Scutellum and elytra dark brown except dark orangish brown epipleural margin. Trochanters orangish brown. Profemora dark orangish brown, except dark brown dorsal surface of apical third; meso- and metafemora black, except brown base and dark orangish-brown apical sides of mesotibiae. Protibiae dark brown except reddish brown basal 2 / 3 of sides and basal third of ventral surface (more dark orangish brown depending on light intensity); meso- and metatibiae blackish. Tarsi black except dark brown pro- and mesotarsomeres V, brown metatarsomere V, and reddish-brown tarsal claws, more orangish brown toward their apices. Ventrites 1–4 with triangular black area centrally, gradually narrowed toward ventrite 4, not reaching its apex, covering entire ventrite 1 blackish; remaining surface of ventrites 1–4 orangish brown; ventrite 5 black basally, gradually dark brown toward apex, except subtriangular orangish brown macula on each side of basal half.

Head. Frons moderately sparsely, coarsely punctate, punctures slightly denser laterally; with abundant whitish pubescence not obscuring integument between eyes, pubescence slightly sparser and brownish centrally, almost glabrous close to postclypeus and posterocentrally; with a few long, erect yellowish-white setae on sides. Vertex moderately sparsely, coarsely punctate; central area with abundant pale-yellow pubescence anteriorly, denser posteriorly; remaining surface with abundant brownish pubescence not obscuring integument, pubescence bristly anteriorly; with long, erect yellowish-white setae interspersed. Area behind upper eye lobes moderately abundantly, coarsely punctate; with abundant brown pubescence not obscuring integument. Area behind lower eye lobes moderately sparsely, coarsely punctate, punctures gradually sparser toward ventral surface; superior region and area of connection between lobes with large, dense yellowish-white pubescence; remaining surface with sparse brownish pubescence, pubescence abundant close to yellowish-white pubescence, gradually sparser toward ventral surface. Genae 0.7 times as long as lower eye lobe; with sparse whitish pubescence on superior half, glabrous on inferior half. Postclypeus sparsely, coarsely punctate, except smooth central area and sides; with a few minute, whitish setae close to frons, sparse, decumbent brownish setae close to anteclypeus, and one long, erect, thick yellowish seta on each side of central region. Labrum coplanar with anteclypeus on posterior third, inclined on anterior 2 / 3; smooth close to anteclypeus, abundantly, coarsely punctate on beginning of inclined area, smooth on remaining surface; glabrous close to anteclypeus and anteriorly, with moderately abundantly, erect, thick yellowish-brown setae on punctate area. Antennal tubercles sparsely, minutely punctate; with abundant whitish pubescence frontally, with sparse brownish pubescence on remaining surface, except almost glabrous basal region of central surface. Area of connection between eye lobes very narrow, without ommatidia centrally; distance between upper eye lobes 0.31 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.60 times distance between outer margins of eyes. Antennae 1.8 times elytral length, reaching elytral apex near apex of antennomere VII. Scape abundantly, finely rugose-punctate except smooth apex; with abundant whitish pubescence not obscuring integument laterally, sparser and bristly ventrally, brownish dorsally, except glabrous apex; with long, erect, sparse whitish setae interspersed ventrally and posterior third of dorsal surface. Pedicel with moderately sparse, both whitish and brown pubescence not obscuring integument, and long, erect whitish setae interspersed. Basal half of antennomere III with sparse, both dark-brown and white bristly pubescence; apical half with a few bristly white setae and abundant, short, erect dark-brown setae on outer surface; with long, erect dark brown setae interspersed, erect setae longer and more abundant ventrally. Antennomere IV with a few short, bristly white setae and abundant, short, erect dark-brown setae on outer surface; erect setae as on III. Antennomeres V – XI with short, bristly dark brown setae, denser from VI; with short, bristly white setae interspersed throughout; V – VI with a few long, erect dark-brown setae interspersed ventrally and dorsal apex. Antennal formula based on length of antennomere III: scape = 0.63; pedicel = 0.09; IV = 0.86; V = 0.50; VI = 0.39; VII = 0.32; VIII = 0.27; IX = 0.26; X = 0.23; XI = 0.25.

Thorax. Prothorax wider than long; sides slightly divergent from anterolateral angles to posterior third, then convergent toward posterolateral angles; sides of posterior third forming slightly rounded protuberance. Pronotum with dense pubescence on light area, pubescence yellowish white laterally, yellowish centrally, except subglabrous area close to anterior margin; dark area with abundant brown pubescence not obscuring integument, pubescence slightly conspicuous depending on viewing angle, bristly laterally; with long, erect whitish setae interspersed on light area. Sides of prothorax with dense yellowish-white pubescence on light area and abundant brown pubescence on dark area not obscuring integument; with long, erect yellowish-white setae interspersed on light area. Prosternum with sparse dark-brown pubescence. Prosternal process with abundant whitish pubescence not obscuring integument, pubescence appearing to be darker depending on light intensity; narrowest area 0.1 times procoxal width. Ventral surface of mesothorax abundantly, coarsely punctate; with moderately sparse brownish pubescence on wide central area of mesoventrite, abundant, mostly brownish pubescence on sides of mesoventrite, mesanepisterna, and mesepimera (pubescence appearing to be lighter depending on light source). Mesoventral process about as wide as prosternal process (damaged in the holotype). Metanepisterna and sides of metaventrite abundantly, coarsely punctate, with abundant dark-brown pubescence partially obscuring integument; remaining surface of metaventrite moderately abundantly, minutely punctate, with abundant yellowish-white pubescence not obscuring integument, except glabrous metathoracic discrimen. Scutellum with sparse brown pubescence, with minute yellowish-white setae interspersed, except apex with abundant yellowish-white pubescence.

Elytra. Abundantly, coarsely punctate, punctures slightly finer toward apex; with abundant fulvous pubescence not obscuring integument, except whitish pubescence close to suture and epipleural margin; with long, erect brown setae interspersed; apex rounded.

Legs. Pro- and mesofemora with very sparse yellowish-white pubescence dorsally and laterally and abundant, bristly pubescence ventrally; metafemora with sparse brownish pubescence dorsally, abundant, both brownish and whitish pubescence on sides, and abundant, bristly whitish pubescence ventrally. Protibiae with sparse whitish pubescence dorsally and laterally, abundant, bristly whitish pubescence on basal half of ventral surface, and abundant, bristly yellowish-brown pubescence on apical half of ventral surface; with sparse, long, erect brownish setae interspersed dorsally and laterally. Mesotibiae glabrous basally, with moderately sparse brownish pubescence on remaining dorsal and inner surfaces, except apex with abundant yellowish pubescence, dense, bristly yellowish-brown pubescence on remaining outer surface, and abundant, bristly brownish pubescence ventrally; with long, erect brownish setae interspersed dorsally and laterally. Metatibiae glabrous basally, with abundant brown pubescence on remaining surface, except apical quarter of sides and ventral surface with abundant, bristly yellowish-brown pubescence; with long, erect brownish setae interspersed. Dorsal surface of pro- and mesotarsi with abundant whitish pubescence not obscuring integument; dorsal surface of metatarsi with abundant, both whitish and brownish pubescence not obscuring integument, pubescence sparser on tarsomere V. Metatarsomere I about as long as II – III together.

Abdomen. Ventrites with abundant yellowish-white pubescence not obscuring integument; apex of ventrite 5 truncate, widely, slightly concave centrally.

Dimensions (mm).

Total length, 7.25; prothoracic length, 1.40; anterior prothoracic width, 1.65; posterior prothoracic width, 1.55; maximum prothoracic width, 1.80; humeral width, 2.10; elytral length, 5.15.

Figures

Figures 29–33. Eranina amaura sp. nov., holotype female: 29. Dorsal habitus; 30. Ventral habitus; 31. Lateral habitus; 32. Head, frontal view; 33. Elytral apices.

Figures 34–41. Eranina spp. 34, 35. Eranina florula (Bates, 1881), female from Guatemala (Izabal, Bobos): 34. Dorsal habitus; 35. Lateral habitus. 36, 37. Eranina leuconoe (Bates, 1881), female from Costa Rica (Limón, 4 km NE Bribri): 36. Dorsal habitus; 37. Lateral habitus. 38, 39. Eranina pectoralis (Bates, 1881), female from Mexico (Veracruz, Lake Catemaco): 38.) Dorsal habitus; 39. Lateral habitus. 40, 41. Eranina sororcula Galileo & Martins, 2013, paratype female from El Salvador (Cuscatlán, Rasario): 40. Dorsal habitus; 41. Lateral habitus.