Streyella Janse

Lee, Sangmi & Brown, Richard L., 2008, Revision of Holarctic Teleiodini (Lepidoptera: Gelechiidae), Zootaxa 1818, pp. 1-55 : 35

Streyella Janse

Streyella Janse, 1958: 99 .

Type species: Streyella pallidigrisea Janse, 1958 , by original designation.

Description. Imago. Labial palpus with second segment somewhat rough scaled and indistinctly grooved ventrally; third segment as long as second, stout, smooth. Clypeus with ventral margin rounded. Antenna simple, longer than half forewing length. Ocellus absent. Posterior area of sitophore with four campaniform sensilla in asymmetrical trapezoid; anterior area with eight campaniform sensilla. Forewing (length/width ratio 4.3) with tufts of erect scales; M1, M2, and M3 separate, CuA1 and CuA2 present; median fascia transverse or directed from base of costa toward posterior margin. Hindwing (length/width ratio 4.0) with R5 and M1 connate, M2 and M3 separate, M3 and CuA1 connate. Male abdominal sternum VIII broad with posterolateral lobe; tergum VIII lingulate with anterolateral and posterolateral brushes of hair pencil, posterior half rectangular. Female abdominal segment VIII membranous mesially.

Male genitalia: uncus subrectangular; gnathos not reaching apex of uncus, horn shaped; tegumen strongly widening anteriorly, anterior margin of tegumen emarginate, with subrectangular sclerotized area mesially, pedunculi small; vinculum with sclerities laterobasally; costal part of valva absent; saccular part of valva broad, shorter than phallus; tegumen basal width/length ratio 1.0; phallus without cornuti.

Female genitalia: apophyses anteriores stout, about 3 x length of abdominal segment VIII; ostium bursae surrounded by variably shaped sclerotization; ductus bursae longer than corpus bursae, covered with microtrichia; signum rhomboid with weakly serrate margins, acute angles forming elongate lobes, with pair of transverse ridges.

Larva. Undescribed.

Pupa. Undescribed.

Diagnosis. Streyella species are similar to those of Altenia and Stenolechiodes in wing venation, but differ by having a horn shaped gnathos, a broad saccular part of valva that is shorter than the phallus, and the absence of the costal part of the valva.

Hosts. Unknown.

Diversity and distribution. Streyella includes three species, the type species from South Africa, a second species from the Canary Islands, and a third occurring in the southwestern Palearctic Region ( Huemer and Karsholt 1999; Janse 1958; Sattler 1964).