Cyana (Idiovulpecula) foya, Volynkin & László, 2019

Volynkin, Anton V. & László, Gyula M., 2019, On the taxonomy of the subgenera Cyabarda Karisch, 2013, Idiovulpecula Karisch, 2013 and Paravulpeculella Karisch, 2013 of the genus Cyana Walker, 1854, with descriptions of three new species from Africa (Lepidoptera, Erebidae, Arctiinae, Lithosiini), Zootaxa 4664 (3), pp. 377-389 : 384-387

Cyana (Idiovulpecula) foya sp. nov.

( Figs 11, 12 , 22 , 30 )

urn:lsid:zoobank.org:act:0EE1ECB0-4A80-4A05-A506-E527746FC642

Type material. Holotype ( Figs 11 , 22 ): ♂, “ Liberia, 530m, Lofa County, Foya Proposed Protected Area , 7°56’36’’N 10°16’36’’W, 10–19.XI.2017, MV Light Trap (125w), Aristophanous, M., Sáfián, Sz., Simonics, G. & Smith, L., leg., ANHRT:2017.33”, ANHRT unique number ANHRTUK 00020066, slide No. AV 4594 ♂ (Coll. ANHRT).

Paratypes: 3 ♂, 1 ♀, with same data as the holotype, ANHRT unique numbers ANHRTUK 00026066, 00020067 , 00020076 and 00020520, slide Nos AV4627 ♂ and AV4628 ♀ (Coll. ANHRT).

Diagnosis. Cyana foya ( Figs 11, 12 ) resembles externally most of other members of the subgenus Idiovulpecula , but differs by its amber yellow transverse lines, whereas the transverse lines are crimson or absent in the related species ( Figs 13–15 ). The ground plane of male genitalia of C. foya ( Fig. 22 ) is similar to those of C. maculata ( Fig. 20 ) and C. lowa ( Fig. 21 ), but can be distinguished by its conspicuously shorter and broader uncus, more elongated juxta, broader vinculum with short but broad medial concavity, narrower medial protrusion of valva costa, narrower cucullus, and shorter but thicker distal saccular process. The aedeagus of C. foya is more elongated compared to the genital capsule than that of C. maculata , has longer and unilobate coecum and larger, broadly trigonal carinal process (that is smaller, finger-like in C. maculata ); in comparison to that of C. lowa , the aedeagus of C. foya is narrower, straight distally (that is curved distally in C. lowa ), with longer coecum and narrower carinal process directed distally (that is broader and directed dorsally in C. lowa ). The vesica structure of C. foya differs clearly from that of C. maculata by the presence of the large, sack-like subbasal diverticulum with a conical tip (that is very small, tubercle-like in C. maculata ), the absence of numerous small cornuti medially and the presence of the subapical field of short, but thick spinules (absent in C. maculata ), and is most similar to that of C. lowa . However, the vesica of C. foya is curved subbasally around the aedeagus axis, and differs from that of C. lowa by its larger, unilobate subbasal diverticulum directed laterally (that is bilobate and directed distally in C. lowa ), the presence of a sclerotised area at vesica base (absent in C. lowa ), its larger lateral diverticulum and shorter subapical field of shorter, thicker and less numerous spinules. The female genitalia of C. foya ( Fig. 30 ) are most similar to those of C. magnitrigutta ( Fig. 31 ) by their antrum shape, but the antrum of C. foya is longer and broader than that of C. magnitrigutta ; in addition, the anterior section of corpus bursae of C. foya is broader with smaller signum, and the posterior sclerotised section of corpus bursae is broader and less rugose compared to those of C. magnitrigutta . It is impossible to recognize the appendix bursae on the holotype slide of C. magnitrigutta , probably it was damaged or cut off accidentally during the preparation.

Description. External morphology of adults ( Figs 11, 12 ). Forewing length 11.5 mm in males and 13 mm in female. Sexual dimorphism barely expressed, wing pattern very similar in both sexes. Head milk white. Antennae ciliate with slightly longer cilia in males. Thorax, patagia and tegulae milk white, latter with one small amber spot. Abdomen whitish with admixture of pale ochreous scales. Forewing ground color milk white. Subbasal dot small, blackish. Cell with two rounded black spots medially and distally. Transverse lines amber. Subbasal line reduced to a short dash at costa. Antemedial line almost straight, oblique outwards posteriorly. Postmedial line evenly curved outwards. Terminal line diffuse, slightly broadened at costa. Cilia white. Hindwing pure milk white without pattern. Male genitalia ( Fig. 22 ). Uncus short, broad, arrowhead-shaped, dorso-ventrally flattened, fused with tuba analis basally. Tuba analis broad, subscaphium weakly setose. Tegumen short and narrow. Juxta broad, inverse shieldshaped, medio-posteriorly shortly and narrowly incised, with a well-developed, elongated ventro-medial crest. Vinculum robust, nearly rectangular, anterior margin slightly concave, with well developed, trapezoidal saccus. Valva narrow at base, broadened medially. Transtillae broad, band-like. Costa with large trigonal dorsal protrusion bearing short subapical inner crest. Cucullus narrow, gently tapering, apically rounded, weakly setose. Sacculus moderately broad, evenly dilated medially, heavily sclerotised, with a robust, strongly curved dorsad, apically pointed distal process. Aedeagus relatively narrow, nearly straight, slightly broadened basally; coecum long, narrowly conical with rounded apex; carina with robust, broadly trigonal process directed dorsally. Vesica twisted around aedeagus axis, vesica ejaculatorius directed proximally. Subbasal section of vesica with a sclerotised plate dorsally. Lateral diverticulum large, membranous, sack-like with conical apex, directed ventrally. Subapical diverticulum small, globular, granulated. Subapical field of spinules narrow, elongated, consists of numerous short but relatively thick spinules of various lengths. Female genitalia ( Fig. 30 ). Ovipositor short and broad, nearly rectangular. Papillae anales broadly trapezoidal with rounded corners, weakly setose. Apophyses thin medium long; apophyses anteriores slightly narrower and shorter than apophyses posteriores. Ostium bursae moderately broad. Antrum caliciform, heavily sclerotised. Ductus bursae narrow, short, sclerotised, rugose. Corpus bursae ovoid, its posterior section sclerotised and rugose at the connection with ductus bursae. Anterior section of corpus bursae membranous, with a small rounded signum. Appendix bursae approximately twice longer than corpus bursae, its basal section rounded, swollen and sclerotised, apical section large, gradually dilated, drop-shaped, membranous.

Distribution. The species is known so far only from Liberia.

Etymology. The specific epithet refers to its type locality in the Foya District of Lofa County, northwestern Liberia.

Figures

FIGURES 9–15. Cyana spp.: adults. 9, C. maculata, ♂, Rwanda (ZSM); 10, C. lowa, holotype ♂, DR Congo (©NHMUK); 11, C. foya, holotype ♂, Liberia (ANHRT); 12, C. foya, paratype ♀, Liberia (ANHRT); 13, C. magnitrigutta, holotype ♀, Cameroon (©NHMUK); 14, C. pretoriae, lectotype ♂, S Africa (©NHMUK); 15, C. pretoriae, ♀, S Africa (©NHMUK).

FIGURES 20–23. Cyana spp.: male genitalia (genital capsule and aedeagus of each species are given in the same scale). 20, C. maculata, Rwanda, slide ZSM Arct. 176/2017 Volynkin (ZSM); 21, C. lowa, holotype, DR Congo, slide NHMUK010315743 (©NHMUK); 22, C. foya, holotype, Liberia, slide AV4594 (ANHRT); 23, C. pretoriae, Zambia, slide AV3031 (ANHRT).

FIGURES 29–32. Cyana spp.: female genitalia. 29, C. pallidilinea, Zambia, slide AV3071 (ANHRT); 30, C. foya, paratype, Liberia, slide AV4628 (ANHRT); 31, C. magnitrigutta, holotype, Cameroon, slide BMNH(E) Arct.-5971 Karisch (©NHMUK); 32, C. pretoriae, Zambia, slide AV3032 (ANHRT).