Dryadaula auriformis, Yang & Li, 2021

Yang, Lin-Lin & Li, Hou-Hun, 2021, The genus Dryadaula Meyrick (Lepidoptera, Tineoidea, Dryadaulidae) in China, with descriptions of four new species and a world checklist, ZooKeys 1074, pp. 61-81 : 61

Dryadaula auriformis sp. nov.

Figures 1 , 7

Type material.

Holotype: China: • ♂; Hainan Province, Mt. Jianfeng (18°44'N, 108°52'E); alt. 787 m; 1.vi.2015; leg. Peixin Cong; genitalia slide No. DNAYLL18124. Paratype: China: • 1 ♂; Hainan Province, Mt. Jianfeng; alt. 745 m; leg. Xia Bai; genitalia slide No. XMR18217.

Differential diagnosis.

The new species is externally similar to D. zinica (Zagulajev, 1970), but can be separated from it by the male genitalia structures. In D. auriformis sp. nov., the left valva is narrowed and clavate, the right valva is bilobate, the bullet-like sternum VIII is smooth in the male genitalia, whereas in D. zinica , the left valva is broad, the right valva is not divided and the sternum VIII bears long and thin bristles on outer margin.

Description.

Adult (Fig. 1 ): Wingspan 8.5 mm in holotype, 9.0 mm in paratype. Vertex and frons smoky grey, tinged with black scales anterior of antenna. Antenna with scape white, except for a black spot at dorsal base; flagellum with alternate yellowish-white and cinereous annulations, cinereous on dorsal surface of basal 2-4 flagellomeres, with three narrow cinereous bands towards apex. Labial palpus spatulate; yellowish-white, first palpomere and basal 3/4 of second palpomere black on outer surface, third palpomere black at base on inner surface, with three black dots on outer surface. Thorax and tegula blackish-brown in anterior 1/2, white in posterior 1/2. Forewing ground colour white, irrorate with blackish-brown scales, edged with bright ochreous yellow scales along of termen and markings; patterned with black markings: costa with a wedge-shaped spot at base, a rectangular spot at 2/5, an obscure dot at middle, an oval patch from 3/5 to 4/5; cell with an obscure irregular spot at distal 1/4, tending to coalesce with oval costal patch; fold with irregular stripes at base, basal 1/3 and 2/3, obliquely inward towards dorsum; an interrupted terminal line around apex then along termen to tornus; cilia white in basal 1/2, grey in distal 1/2, with individual scales dark-tipped. Hind-wing and cilia grey. Legs greyish-white, tibia black on outer surface, tarsus black on dorsal surface, except for end of each tarsomere.

Male genitalia (Fig. 7 ). Uncus lobes small, ear-shaped, bearing dense setae dorso-apically. Subscaphium not developed. Tegumen somewhat broad. Vinculum narrowed, deeply arched at middle, without additional lobe. Saccus not developed. A complicated, irregular, sclerotised modification attached to vinculum anteriorly, possibly part of segments VII and VIII; its left part rectangular, with a stout digitation, its right part stem-like. Sternum VIII articulated with vinculum at left, articulated with left valva dorso-basally; somewhat bullet-like, narrowly rounded and folded apically, triangularly folded at 1/3 on ventral margin. Valvae strongly asymmetrical. Left valva clavate, bent outwards; its basal part skirt-like, arched anteriorly, distal part a globular, setose lobe, a small, digital, setose lobe at distal 1/3. Right valva bilobate: dorsal lobe with a thumb-like process articulated with juxta at base, middle part curved like a gooseneck, distal part globular, setose; ventral lobe with three prominences, one stout, finger-like, one slightly twisted, horn-shaped and one hammer-shaped. Juxta irregular in shape. Aedeagus a curved horn with a stout base; cornutus absent.

Female. Unknown.

Distribution.

China (Hainan).

Etymology.

The specific name is derived from the Latin Dryadaula auriformis , meaning ear-shaped, referring to the ear-shaped uncus lobes.

DNA barcode.

One DNA barcode from the holotype was generated and deposited in GenBank and BOLD systems: MZ711361/ DRYAD001-21. Dryadaula auriformis sp. nov. is clearly distinguishable by its DNA barcode from its congeners, the minimum divergence (Table 1 ) to the nearest species, D. heindeli Gaedike & Scholz, is 17.74-17.95%.

Figures

Figures 1 - 4. Adults of Dryadaula species 1 Dryadaula auriformis sp. nov., male holotype 1 a lateral view of head 2 D. flavostriata sp. nov., male holotype 2 a lateral view of head 3 D. hirtiglobosa sp. nov., male holotype 3 a lateral view of head 4 D. securiformis sp. nov., male holotype 4 a lateral view of head. Scale bars: 1.0 mm.

Figures 7, 8. Male genitalia of Dryadaula species 7 D. auriformis sp. nov., holotype, slide No. DNAYLL 18124 8 D. flavostriata sp. nov., holotype, slide No. YLL 11112. Scale bars: 0.25 mm. (U = uncus lobes; T = tegumen; V = vinculum; S = saccus; S VIII = sternum VIII; Vr = right valva; Vl = left valva; J = juxta; A = aedeagus).