Ancylogastra coronata 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 : 58-59

Ancylogastra coronata Bassi , sp. n.

( Figs 6 , 32, 33 )

Holotype female, with labels: 1) Holotypus; 2) SO Kamerun [ Equatorial Guinea], 14.09.[19]08, Uem Gebiet [probably Uelleburg near Benito = Mbini, 01°35’ N, 09° 37’ E], G. Tessmann S.G. [legit]; 2) GS 4055 GB; 3) Ancylogastra coronata Bassi , Holotype, G. Bassi det. Deposited in MFNB .

Diagnosis. The bright white ground colour distinguishes A. coronata sp. n. ( Fig. 6 ) from all congeners. The female genitalia ( Fig. 33 ) are close to A. ghanensis sp. n. ( Fig. 31 ) and A. burundiana sp. n. ( Fig. 29 ), but the stout sterigma as opposed the slenderer sterigma of the other two species is diagnostic.

Etymology. The name is derived from the Latin coronatus-a = with crown, and refers to the shape of the sterigma in the female genitalia.

Description ( Fig. 6 ). Wingspan 28 mm. Labial palpi four times as long as wider diameter of eye, white with a black spot medially. Maxillary palpi white. Frons rounded, slightly produced, white. Antennae thin, serrate, dark brown with silvery white costa. Ocelli well developed; chaetosemata minute. Vertex white. Patagia white, laterally sprinkled with black. Tegulae white, black medially. Thorax white. Forewing slender, with rounded apex and almost straight termen; ground colour off-white sprinkled with silvery white, with basal patch of large scales brown and brown tipped black; two large black dots in cell and medio-dorsally; subterminal fascia gently arched toward costa, silvery white bordered with pale brown; subterminal area pale ivory yellow with seven subterminal black spots; terminal line black; fringes bicoloured silvery white and bronze brown; underside white suffused black brown medially and along costa. Hindwing white with terminal line pale yellowish brown; fringes white; underside white with costa suffused with yellowish brown. Legs white with tarsi annulated with black. Abdomen pale yellow sprinkled with brown.

Male unknown.

Female genitalia ( Figs 32, 33 ). Papillae anales stout, rounded. Apophyses posteriores arched and apically bulged, with bases irregularly sclerotised. Abdominal segment VIII dorsally sclerotised in basal half. Apophyses anteriores longer than apophyses posteriores, narrow, arched and apically bifid. Sterigma ring-shaped, spiny and weakly sclerotised dorsally, strongly produced and sclerotised, spiny and wrinkled ventrally. Ostium bursae membranous. Ductus bursae larger than antrum, slightly shorter than corpus bursae, with a subtriangular sclerotised band, ending at inception of ductus seminalis, between ductus bursae and corpus bursae; lateral extension small, rounded, membranous. Corpus bursae membranous, subrectangular, scobinate proximally, then delicately wrinkled, with weakly sclerotised row of scobinations medially.

Distribution. Only known from the type locality in Equatorial Guinea.

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 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.