Ancylogastra ghanensis Bassi, 2021

Bassi, Graziano, Sáfián, Szabolcs, Léger, Théo, Müller, Günter C., Kravchenko, Vasiliy D. & Poltavsky, Alexander N., 2021, Ancylogastra, a new genus of Afrotropical Crambinae, with descriptions of seven new species (Lepidoptera, Pyraloidea, Crambidae), Zootaxa 5052 (1), pp. 42-60 : 59-60

Ancylogastra ghanensis Bassi , sp. n.

( Figs 8 , 18–20 , 31 )

Holotype male with labels: 1) Holotypus; 2) Ghana, Volta region, Amezdofe , 830 m, 06°52’ N 0°26’ W, Dr. S. Endrődy-Younga [legit] 3) nr. 273, at light, 1.IX.1967 4) Ancylogastra ghanensis Bassi , Holotype, G. Bassi det. Deposited in HNHM .

Paratypes: 6 males, 3 females, same data as holotype, GS 5481, 6195, 6199, 6220, 6246 GB, HMNH and RCGB .

Diagnosis. In habitus ( Fig. 8 ) close to A. burundiana sp. n. ( Fig. 7 ), but with forewing narrower and in yellowish white ground colour, and abdomen yellow. In the male genitalia ( Fig. 18 ) the phallus is distally swollen and curved, without apical tooth. In the female genitalia ( Fig. 31 ) the sterigma is narrower and more pointed and the ductus bursae is narrower and more sclerotised.

Etymology. The name of the new species refers to the name of the country of origin of the type series.

Description ( Fig. 8 ). Wingspan: males 20–24 mm, females 24–29 mm. Labial palpi four times as long as eye diameter, dark brown with dorsal margin more or less white with subapical dark brown dot. Maxillary palpi subtriangular, dark brown tipped white. Antenna in male bipectinate, with rami one and a half times as long as flagellomere, dark brown with costa brown sprinkled with white; in female simple, brown. Frons rounded, slightly produced, brown sprinkled with white. Ocelli and chaetosemata poorly developed. Vertex white with brown dot medially. Tegulae white sprinkled with brown and dark brown. Thorax dark brown sprinkled with white. Forewing ground colour yellowish white, sprinkled with silvery, brown and dark brown scales; costal margin brown up to two thirds its length; dorsum dark brown mixed with brown and white; medial fascia large, dark brown, ill-defined to zig-zag shaped; medial dot large, subrectangular, blackish brown; postmedial fascia silvery white, with brown borders, especially the inner one strongly dentate; subterminal area ivory yellow with seven black subterminal spots; terminal line black; apex rounded; termen straight to slightly concave; fringes bicoloured white and silvery grey; underside bronze brown with termen and dorsal line white. Hindwing shiny white suffused with pale ivory yellow; terminal line black brown; fringes bright white; underside white strongly suffused with brown along costa. Foreleg brown with tarsi annulated with white; mid and hindleg white with tarsi annulated with brown. Abdomen in males ivory yellow; in females more yellow with tergites often bordered with pale golden yellow and with yellow anal tuft. Sclerotisations of male abdominal segment VIII as in Figs 19, 20 .

Male genitalia ( Fig. 18 ). Uncus and gnathos of equal length, both slightly curved distally and with thinly rounded apex. Tegumen long and narrow. Vinculum rounded. Pseudosaccus subconical. Juxta v-shaped. Valva simple, narrowing towards apex; costal arm strongly upcurved beyond middle, pointed. Phallus shorter than valva, bulged and downcurved towards apex; vesica with small sclerotised plates and several scobinations.

Female genitalia ( Fig. 31 ). Papillae anales stout, bulged ventrally. Apophyses posteriores basally narrow and medially bulged, then stout and slightly arched. Abdominal segment VIII almost parallel-margined, less sclerotised ventrally. Apophyses anteriores slightly longer than apophyses posteriores, narrow and almost straight. Sterigma bulged dorsally and acutely subtriangular ventrally. Ostium bursae lightly sclerotised. Ductus bursae basally funnelshaped, slightly longer than corpus bursae, strongly sclerotised basally, with a subtriangular sclerotised band along its length, ending at inception of ductus seminalis, proximally in corpus bursae; lateral extension narrow, very short, sclerotised basally and then membranous. Corpus bursae suboval, membranous, wrinkled.

Distribution. Only known from the type locality in Ghana.

Figures

FIGURES 1–8. Adults of Ancylogastra Bassi & Poltavsky, gen. n. species. A. amphiaula (Meyrick), female, Malawi, Nyika National Park. 2. A. magnifica Bassi, sp. n., male holotype. 3. A. boireaui Bassi & Sáfián, sp. n., male holotype. 4. A. gangraensis Bassi, Sáfián, Müller & †Kravchenko, sp. n., male paratype. 5. A. endroedyi Bassi, sp. n., female holotype. 6. A. coronata Bassi, sp. n., female holotype. 7. A. burundiana Bassi, sp. n., male paratype. 8. A. ghanensis Bassi, sp. n., male holotype. Scale bars = 10 mm.

FIGURES 16–24. Male genitalia and abdominal sclerotisations of Ancylogastra Bassi & Poltavsky, gen. n. species. 16. A. burundiana Bassi, sp. n., holotype; 17. The same, tergite of eighth abdominal segment; 18. A. ghanensis Bassi, sp. n., paratype GS 6220 GB; 19. The same, paratype GS 6246 GB, sternite of eighth abdominal segment; 20. The same, tergite of eighth abdominal segment; 21. A. gangraensis Bassi, Sáfián, Müller & †Kravchenko, sp. n., paratype GS 6690 GB, Guinea; 22. The same, tergite of eighth abdominal segment; 23. The same, sternite of eighth abdominal segment; 24. The same, apex of phallus magnified. Not to scale.

FIGURES 29–33. Female genitalia of Ancylogastra Bassi & Poltavsky, gen. n. species. 29. A. burundiana Bassi, sp. n., paratype GS 2829 GB; 30. The same, magnified to show the lateral extension of ductus bursae; 31. A. ghanensis Bassi, sp. n., paratype GS 6195 GB; 32. A. coronata Bassi, sp. n., holotype, magnified to show the lateral extension of ductus bursae; 33. The same, holotype. Not to scale.