Dicepolia cuiabalis, Hayden, James E., 2009

Hayden, James E., 2009, Taxonomic revision of Neotropical Dicepolia Snellen (Lepidoptera: Crambidae), Zootaxa 2237, pp. 1-33 : 23-25

Dicepolia cuiabalis sp. nov.

Figures 11, 26, 42

Material examined: Holotype 3 (NHM): At human / perspiration // 39. 27. / Burity, 30 miles N.E. / of Cuyabá, 2250 ft. / 22–30.ix.27 / Matto Grosso / C.L. Collenette // B.M. Pyralidae male / Genitalia slide / No. 22135 // [red label] HOLOTYPE / Dicepolia / cuiabalis / J.E. Hayden // BMNH (E) #846391. Dissected.

Diagnosis: Dorsal coloration warm fawn-brown, rosy only on hindwing; forewing transverse lines interrupted on veins, PM curving basad more strongly and smoothly. Hindwing PM prominent. A8 pleural androconium present. S8 posterior medial spine large and broad-based, with whole medial area elevated from the plane of the sclerite. Vinculum convex. Cornuti numerous and short.

Description: Dorsum of head, mouthparts, thorax, and forewings yellowish brown, with mouthparts, frons and forewing costa somewhat more reddish. Frontoclypeus not strongly prominent, projecting 0.15 ± 0.03 mm, frontoclypeus a low, round arch. Frons flat. Eye 0.90 ± 0.03 mm. Labial palpi 2.5 ± 0.1 mm. Palpi:eye ratio 2.8. Antennae pale brown, moderately ciliate (cilia not longer than width). Haustellar scales white. Cervical scales white. Dorsal thorax yellowish-orange brown, like wings. Ventral thorax and legs white, except foreleg tibia interior pale brown, dorsal edge of midleg tibia dark brown in basal half. Male foreleg without femoral androconia. Outer: inner spur ratios: midleg, 0.5; hindleg, 0.6–0.75.

Forewing length 9.1 ± 0.2 mm, width 5.4 ± 0.2 mm, length:width ratio 1.6 (fig. 11). Color yellowish brown. Costa darker orange brown; transverse lines of blackish scales. Antemedial line faint, broken on veins, present on discal cell, on anal fold and between A2 and edge; bent most distad on anal fold. Postmedial line bent basad smoothly but very strongly, the basad curvature starting about M3. Marginal fringe basally dark gray, longer scales white. Scale-tooth absent from posterior edge. Forewing undersides pale brown, anal area off-white; transverse lines not visible. Hindwings pearly white. Terminal area broadly yellowish/rosy brown, more intense toward edge. Black PM line faintly present from medial to anal veins.

Abdomen dorsally ochre-brown, interspersed with some white; T1–3 with some rosy scales. Fading to cream ventrally. S7 tuft present.

Male genitalia (figs 26, 42): S8 anterior emargination rather triangular. S8 posterior edge appearing straight, with shallow central emargination obscured by the large, broad-based medial spine, which is elevated from the plane of the sclerite. A8 pleural androconium linear. Lamelliform structures on sloping shoulders with bases slightly convergent laterally. Vinculum evenly, shallowly convex. Gnathos arms converging at 90- degree angle; gnathos lateral arms robust; median element as long as arms. Costal flutes present. Valva oblong. Phallus with 1.5 spirals. Several short cornuti, to half length of phallus.

Female genitalia: unknown.

Etymology: In reference to Cuiabá, the city nearest the type locality.

Distribution: Brazil, Mato Grosso, Buriti, near Cuiabá.

Flight period: Latter September.

Similar species: D. roseobrunnea and D. vaga have continuous forewing lines and a forewing PM not curving basad as strongly. D. vaga is more nearly brick red in forewing color. The S8 median spinule is smaller in those species, and there is a single long cornutus.

Remarks: Known only from the holotype. It is clearly different from D. roseobrunnea from Poconé in the Pantanal, which are smaller than most conspecifics (resembling the Paraiba specimens) but otherwise typical D. roseobrunnea . The type locality of D. cuiabalis is at higher elevation than the Pantanal site.

PLATE 5. a, male genitalia; b, phalli. Scale bars = 1mm. J.E. Hayden prep. nos. unless indicated. 43. D. vaga (241); 44. D. venezolalis (359); 45. D. marginescriptalis (287); 46. D. munroealis holotype (MNHN; scale not available); 47. D. rufeolalis (266); 48. Labial palpi, D. artoides , Venezuela (MIZA); 49. Acutely arched frontoclypeus, D. rufitinctalis , Venezuela (MIZA); 50. Obtusely arched frontoclypeus, D. artoides , Venezuela (MIZA).

PLATE 6. female genitalia. Scale bars = 1mm. J.E. Hayden prep. nos. unless indicated. 51. D. roseobrunnea (223); 52. D. rufitinctalis (167); 53. D. aerealis (366; ds emerging from neck between cervix and corpus bursae); 54. D. artoides (NHM 22141); 55. D. bicolor (NHM 18010); 56. D. vaga (517); 57. D. munroealis (288): a, ovipositor; b, bursa; 58. D. rufeolalis (267); 59. E. sudanalis holotype (341). ab, appendix of corpus bursae; ac, appendix of cervix bursae; b, corpus bursae; c, cervix bursae; cs, colliculum spur; ds, ductus seminalis; s, signum.