Paranudina Huang & Wang, 2019

Huang, Si-Yao, Tan, Shun-Yun, Wang, Min & Fan, Xiao-Ling, 2019, Establishment of a new genus for Nudina xizangensis Fang, 2000 (Lepidoptera, Erebidae, Arctiinae, Lithosiini), Zootaxa 4683 (2), pp. 271-276 : 272-273

Paranudina Huang & Wang , gen. nov.

Type species: Nudina xizangensis Fang, 2000 .

Diagnosis. The new genus (figs. 1–4) is characterized by the following autapomorphies: 1) antenna filiform in ♂ and hindwing upperside unmarked. 2) In ♂ genitalia (fig. 7) uncus short and broad with rounded apex; juxta Hshaped with long and distally broadened and spiny process; costa long with lower edge fusing with dorsal edge of sacculus and forming a spatulate process and aedeagus significantly narrowing at the middle. 3) In ♀ genitalia (fig. 9) ductus bursae long, broad and edged by a strongly sclerotized bar anteriorly and corpus bursae large and not fully covered by spinules.

Description. Adult. Length of forewing 12.5 mm in ♂, 15 mm in ♀. Medium-sized moth. Antenna filiform in both sexes. Forewing venation similar to Nudina . Forewing ground color yellow, with brownish pattern. In ♂, a black spot present in discal cell; antemedial band extending from lower portion of discal cell and significantly expanding at dorsum; medial band shifting outwards near lower angle of discal cell, extending from upper angle of discal cell and ending at dorsum; postmedial band running from subapical zone and reaching tornus, with medial portion shifting basally, touching the medial band. In ♀ most of the pattern similar to male except the medial band and postmedial band fused with each other around tornus. Hindwing ground color slightly paler than forewing, without any markings.

♂ genitalia. (Fig. 7) Uncus short and stout, with a rounded tip. Tegumen broad, triangular. Juxta strongly sclerotized, broad at base, with the lobes developed into long process which becoming blade-like at distal part with several small spines presenting at the surface and edge. Saccus broad, nearly triangular, with tip rounded. Valva broad at base. Cucullus long and oval. Costa short and broad, sclerotized, its lower edge fused with the dorsal edge of sacculus at the base of a well-developed spatulate process, which is covered by numerous small spines. Sacculus long and broad, ending in a trapezoid process directing dorsally, with its dorsal edge covered by numerous spinules. Aedeagus broad and moderate long, narrowing at the middle and expanding at tip. Vesica long and broad, covered by spinules thoroughly.

♀ genitalia. (Fig. 9) Papilla analis rectangular. Apophysis posteriores and anteriores short, sclerotized, the former about twice the length of the latter.Antevaginal plate strongly sclerotized, concave at the middle portion. Antrum broad and short, strongly sclerotized. Ductus bursae very short and broad, sclerotized and gradually expanding towards corpus bursae and edged by a strongly sclerotized bar anteriorly. Corpus bursae membranous, large and oval, with most of the surface covered by numerous long spinules, leaving a semicircle area on the extreme right side without any spines.

Etymology. The genus name is a combination of Para -(means “resembling” in Latin) and Nudina . Gender is feminine.

Distribution. The only species of the genus is distributed in southern slope of Himalayas, and currently only found in Xizang (Tibet) Autonomous Prefecture in P. R. China.

Remarks. Paranudina gen. nov. can be distinguished from Nudina Staudinger, 1877 by the following combination of characters: 1) antenna filiform in ♂ (bipectinate in Nudina ); 2) hindwing unmarked in both sexes (with darkish brown shade in both sexes in Nudina ); 3) in ♂ genitalia uncus shorter and broader with rounded apex (uncus longer and narrow with apex sharp in Nudina ); 4) juxta with long and distally broadened and spiny process (juxta simple and flat at dorsal edge in Nudina ); 5) costa longer with lower edge fusing together with dorsal edge of sacculus and forming a spatulate process (costa shorter, well separated from sacculus, distal process of sacculus forming a sharp spear-like process and a dorsal digital process in Nudina ); 6) aedeagus significantly narrowing at the middle (aedeagus gradually broadening towards tip in Nudina ); 7) in ♀ genitalia ductus bursae much longer and broader (ductus bursae very short and nearly invisible in Nudina ) and 8) corpus bursae much larger and not fully covered by spinules (corpus bursae much smaller and covered with spinules totally in Nudina ).

By the wing pattern, This new genus is also somewhat similar to the genus Paraheliosia Dubatolov, Kishida & Wu, 2014 , but Paranudina gen. nov. can be immediately distinguished from Paraheliosia by ♂ genitalia uncus stouter with rounded tip (uncus longer and narrow with apex sharp and hooked in Paraheliosia ), lobes of juxta thicker and much longer (lobes of juxta much shorter and narrower, forming tooth-like process in Paraheliosia ), sacculus ending with a broad and trapezoid process (sacculus ending with long and slender process in Paraheliosia ) and aedeagus without any spines laterally (aedeagus with strong spines at lateral wall in Paraheliosia ).

FIGURES 1–6. Adults of Paranudina gen. nov. and Nudina : 1–4: Paranudina xizangensis ( Fang, 2000) comb. nov.; 1: ♂, holotype of Nudina xizangensis Fang, 2000 (IZCAS), 2: ♀, allotype of Nudina xizangensis Fang, 2000 (IZCAS), 3: ♂, Motuo, Xizang (SCAU), 4: ♀, ditto (SCAU). 5–6: Nudina artaxidia ( Butler, 1881) ; 5: ♂, Xingshan, Hubei (SCAU), 6: ♀, Qujing, Yunnan (SCAU). Scale= 1 cm.