Biampullisna Volynkin, 2024, gen. n.
Creators: name: Volynkin, Anton V.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Erebidae
Biampullisna

description: Biampullisna gen. n.
https://zoobank.org/ urn:lsid:zoobank.org:act: 70D82C21-6EDC-4CCD-BDD0-754155D4A801
Type species: Teulisna uniplaga Hampson, 1894, by present designation.
Diagnosis. The type species of the new genus (Fig 1, 2) is externally reminiscent of certain members of the genus Teulisna (including the type one) (Figs 3–5) as well as the male of the sexually dimorphic genus Witteulisna Volynkin, 2020 (Fig. 6), which has, however, fundamentally different genitalia of both sexes (Figs 16, 17), but differs in the forewing with a nearly straight costal margin and unmodified venation, and without patches of androconial scales. The male genital capsule of Biampullisna gen. n. (Fig. 9) is characterised by the combination of the following three features. (1) The uncus is weakly sclerotised, dorso-ventrally flattened, relatively short and fused with the dorsal wall of the anal cone whereas in Teulisna (Figs 10–12) it is longer, heavily sclerotised, laterally flattened and separate from the anal cone, which, in turn, has a thin scaphium. (2) The tegumen has narrow and weakly sclerotised arms with only dorsal ends being fused whereas that of Teulisna is bell-shaped with strongly dorsally dilated arms, which are fused in their dorsal three-quarters. The vinculum is short, more or less Ushaped, lacking the intravincular structures whereas in Teulisna it is longer, frame-shaped and has intravincular sclerotised structures (discussed by Volynkin (2024)), which may be reduced in certain groups (Figs 7, 8, 12, 15) but their remnants are still recognisable. (3) The editum is elongate, its proximal part occupies the base of the dorsal margin of the valva while the distal section is reaching the base of the distal saccular process; the editum bears two ampullae: a stake-shaped proximal and a lobe-like, spinulose distal ones. Unlike in Biampullisna gen. n., the editum of Teulisna is shorter, situated more ventrally, and bears a medial ampulla or lacks it, while the costa occupies the whole proximal section of the dorsal margin of the valva, and additionally bears a proximal process in a number of species. The phallus of Biampullisna gen. n. is markedly smaller than in Teulisna (in proportion to the genital capsule), but the vesicae of the two genera display no fundamental differences. In the female genitalia, the membranous corpus bursae is characteristic of the new genus (Fig. 13) whereas in Teulisna (Figs 14, 15) the corpus bursae has broad gelatinous areas or sclerotised plates.
Description. Adults (Figs 1, 2). Sexual dimorphism limited: female larger than male, its forewing somewhat broader and with more elongate apex. Antenna weakly ciliate in both sexes, ochreous proximally and blackish medially and distally. Head pale ochreous yellow. Thorax black with deep ochreous yellow tegula and patagia. Forewing elongate and narrow, with tapered apex and convex termen and anal margin. Forewing ground colour pale ochreous yellow with intense dark grey suffusion. Forewing pattern black, consisting of diffuse subbasal dash, large pentagonal medial patch touching the anal margin but not reaching the costal one, and small trapezoidal costal postmedial spot. Cilia ochreous yellow. Hindwing ground colour and cilia uniformly brownish-grey with ochreous irroration. Abdomen brownish-grey, with ochreous yellow hair-shaped scales distally. Male genitalia (Fig. 9). Uncus weakly sclerotised, dorso-ventrally flattened, relatively short, distally tapered and apically rounded, fused with dorsal wall of anal cone. Anal cone with very broad basal section occupying most of intrategumenal area. Tegumen with narrow and weakly sclerotised arms fused only apically (dorsally). Vinculum as long as tegumen but more heavily sclerotised, U-shaped. Valva lobular, gradually tapered distally, with apically rounded valvula. Tendon basally triangular, distally (entally) thin and ribbon-like, fused with its counterpart. Editum large, stretching distad along the costa and reaching the base of distal saccular process, bearing two ampullae. Proximal ampulla smoothly upcurved stake-shaped, apically pointed. Distal ampulla lobe-like flattened, with densely spinulose ventral margin. Sacculus moderately broad, its dorsal margin connected to juxta by membrane of annelifer while ental end firmly articulated with its counterpart. Distal saccular process thin but heavily sclerotised, upcurved, distally rugose and serrulate, and apically pointed. Juxta trapezoidal and weakly sclerotised, with trapezoidal caulis reaching the base of anellus. Phallus cylindrical, S-like curved, with short and rounded coecum. Proximal section of vesica tubular, somewhat tapered distally, bearing cluster of numerous denticles of various sizes dorsally and laterally. Medial section of vesica covered with spinulose scobination, with large clavate ventral diverticulum also densely covered with minute spinules and bearing cluster of four or five spikelike cornuti of various sizes. Vesica ejaculatorius originating distally. Female genitalia (Fig. 13). Papilla analis trapezoidal with rounded corners, weakly setose. Apophyses elongate and thin, anterior one somewhat longer and thicker than posterior one. 8 th segment narrow and moderately sclerotised. Postvaginal area weakly sclerotised and rugose. Ventral margin of ostium bursae with deep medial Vshaped incision. Ductus bursae goblet-shaped, gelatinous. Corpus bursae pyriform, membranous. Appendix bursae short, conical, membranous, situated postero-ventrally.
Etymology. The new genus name is an aggregate of the Latin adjective ‘biampullalis’ meaning ‘double- ampullar’ and the genus- group name Teulisna, and refers to the presence of two ampullae in the male genitalia of the type species. The gender is feminine.
description: Published as part of Volynkin, Anton V., 2024, Biampullisna, a new genus for " Teulisna " uniplaga Hampson (Lepidoptera: Erebidae: Arctiinae: Lithosiini), pp. 72-78 in Ecologica Montenegrina 78 on pages 73-76, DOI: 10.37828/em.2024.78.8, http://zenodo.org/record/14654239