Dracontogena metamorphica, Meyrick, 1928

Aarvik, Leif, Karisch, Timm & Marthinsen, Gunnhild, 2012, Review of the Afrotropical genus Dracontogena Diakonoff, 1970 (Lepidoptera, Tortricidae) with descriptions of eight new species, Zootaxa 3478, pp. 345-372 : 356-357

Dracontogena metamorphica species group

Male hindwing without modifications, valva lacking internal circular scale patch, male abdomen without coremata. The spatulate scales at the hindwing anal corner have a serrate distal edge. The species are variable, and in general, dissection of the genitalia is necessary for accurate identification.

Dracontogena metamorphica ( Meyrick, 1928)

( Figs. 46 , 62, 63 )

Eucosma metamorphica Meyrick, 1928: 439 ; Clarke 1958: 375, pl. 186, figs. 1, 1a.

Dracontogena metamorphica Karisch 2005: 462 , text figs. 13, 15, pl. 1, fig. 8.

Material examined. Lectotype of Eucosma metamorphica , 3, Sao Tomé, February, T.A. Barns, genitalia slide BMNH 9396 ( BMNH); 1Ƥ, same data as lectotype, genitalia slide 30576 ( BMNH); 1Ƥ, same data as lectotype, genitalia slide L. Aarvik 2011.025 ( USNM).

Diagnosis. Wingspan 20.0–25.0 mm. Externally, D. metamorphica resembles the bicoloured form of D. kingstoni n. sp. (see below). The male genitalia ( Fig. 46 ) are distinct by the deeply excavate ventral edge of valva. The female genitalia ( Fig. 62, 63 ) have sternite 7 deeply excavate with two membranous bands anterior of the excavation; segment 7 with conspicuous scale sockets anterolaterally; the sterigma large, becoming wider posteriorly; and the paired oval sclerites posterior of the sterigma small, separate.

Distribution. Known only from Sao Tomé, an island in the Gulf of Guinea, West Africa.

Figures

FIGURES 41 – 46. Male genitalia in Dracontogena. 41. D. bernardi Karisch. (slide L. Aarvik 2808). 42. D. bernardi Karisch, phallus (slide L. Aarvik 2808). 43. D. solii n. sp. (slide NHMO 2010). 44. D. solii n. sp. phallus (slide NHMO 2010). 45. D. tonitrualis (Meyrick). 46. D. metamorphica (Meyrick). Scale figs. 41, 43: 1 mm., figs. 42, 44: 0.5 mm. Figs. 45 – 46 from Karisch (2005).

FIGURES 60 – 63. Female genitalia of Dracontogena. 60. D. agassizi n. sp. (slide USNM 137,547). 61. D. agassizi n. sp. sterigma and sternite 7 (slide T. Karisch 1923). 62 – 63. D. metamorphica (Meyrick) (slide L. Aarvik 2011.025). Scale figs. 60, 62: 1 mm., figs. 61, 63: 0.5 mm.