Philonome lambdagrapha Sohn, Davis & Lopez-Vaamonde

Sohn, Jae-Cheon, Davis, Donald R. & Lopez-Vaamonde, Carlos, 2015, Revision of the genus Philonome Chambers and its proposed reassignment to the family Tineidae (Lepidoptera, Tineoidea), ZooKeys 494, pp. 69-106 : 80-82

Taxon classification Animalia Lepidoptera Lyonetiidae

Philonome lambdagrapha Sohn, Davis & Lopez-Vaamonde sp. n. Figs 6, 37-39

Diagnosis.

This species is similar to Philonome curvilineata in external appearance but differs from the latter in having the longitudinal and costal fasciae separate (continuous in Philonome curvilineata and larger apical protrusion on the tegumen in the male genitalia.

Adult

(Fig. 6). Head: Vertex orange on posterior 2/3, pale orange on anterior 1/3; scales on dorsum of occiput dark grayish brown; scales between antennal scapes lustrous pale orange; frons lustrous pale yellow. Antenna 4/5 as long as forewing; scape as long as diameter of eye, lustrous orange dorsally, lustrous pale yellowish gray laterally and ventrally, lustrous pale grayish brown apically; flagellomeres pale orange dorsally, lustrous pale yellow ventrally. Labial palpus 1/2 as long as antennal scape, lustrous pale yellowish gray.

Thorax: Patagium dark brown; tegula lustrous pale yellow, intermixed with orange scales basally; mesonotum silvery white with dark brown transverse band along anterior and posterior margins and at anterior 1/3, with orange transverse band at middle. Foreleg with coxa lustrous pale yellow; femur lustrous pale yellow, intermixed with pale grayish brown laterally; tibia dark brown dorsally, pale grayish yellow ventrally; tarsomeres dark brown dorsally, pale orange ventrally. Midleg with coxa and femur lustrous pale yellow; tibia and tarsomeres grayish brown dorsally, pale yellow ventrally. Hindleg consumed for DNA extraction. Forewing length 3.0 mm (n = 1), reddish brown; costa black in distal 1/3; longitudinal fascia extending to apical streak, straight, white on basal 1/2, juxtaposed with a slender, intermittent black line along lower border, sinuous, black on distal 1/2; costal fasciae slender, extending to apex; subapical streak white, juxtaposed with slender black line along lower border; apical streak white, connected with longitudinal fascia; dorsal bar white, juxtaposed with black along outer border; dorsal margin sparsely irrorated with black scales on basal 1/6 and at middle; tornal patch elongate, white, juxtaposed with black along upper border, irrorated with dark brown scales along outer border; marginal streak dark brown; fringe brown on distal 1/3 of costa, pale yellowish gray along termen. Hindwing brownish gray; fringe pale grayish brown.

Abdomen: Male tergum VIII and sternum VIII subquadrate; coremata piliform, as long as tergum VIII.

Male genitalia (Figs 37-39): Tegumen nearly as long as valva, semi-elliptical on basal 3/4, rectangular on distal 1/4, with small lateral protrusion dorsoposteriorly. Valva elongate, lobate, sparsely setose on outer surface. Juxta liguiform, 1/2 as long as valva. Vinculum broad, gradually broadened anteriorly, with medial and lateral protrusions along anterior margin; Phallus slightly curved at basal 2/5, broadened posteriorly.

Female unknown.

Type.

Holotype: male, "ID#: CLV102310 [red letters] French Guiana: [ Régina, Nouragues Research Station] [Lt:4.1 Ln:52/] Carlos Lopez Vaamonde 23-Jan-2010 DNA Barcode LNOUA928-10 [green letters in blue row]", “Nou68”, "Genitalia slide DRD ♂ USNM 34621" [green label], USNM.

Distribution.

French Guiana.

Etymology.

The species name is derived from the Greek letter ‘lambda’ and a suffix derived from the Greek ‘graphein’ meaning "to write", and refers to the white fascia of the forewing resembling a lambda (λ).