Stueningeria pinratanai, Yakovlev & Zolotuhin, 2021

Yakovlev, Roman V. & Zolotuhin, Vadim V., 2021, Revision of the family Metarbelidae (Lepidoptera) of the Oriental Region. III. Genus Stueningeria Lehmann, 2019, Ecologica Montenegrina 43, pp. 16-29 : 27-28

Stueningeria pinratanai sp. nov.

https://zoobank.org/ urn:lsid:zoobank.org:act:9F99A1DE-04F5-41EA-94C1-6D4AF5F1E473

Figs 14−15 , 23 , 26 , 32

Material examined. Holotype, male, NW Thailand, Chiangmai , Doi Pui Forest Res. Stat., 7.iv.1988, 1450 m ( MWM) . Paratypes: 12 males, 2 females, same locality ( MWM) .

Description. Male. Length of fore wing 12−13.5 mm. Antenna short, bipectinate, setae in medium third of antenna 2 times longer than antenna rod diameter, thorax and tegulae from above covered with long brown scales (except for medium third of abdomen covered with light-grey scales), abdomen apically with long modified scales. Fore wing light-brown with bright pattern of dark-brown elements: series of spots along costal edge of wing, spots in discal cell, postdiscally and submarginally; in cubital area (from base to tornal angle) long crescent portion of grey androconium scales extended in medium third, two wide short portions of grey androconium scales between radial trunk veins; border creamy. Hind wing light-grey, without pattern, anal edge creamy without pattern, border dark-grey. Fringe on all wings mottled, light between veins, brown at veins.

Male genitalia ( Fig. 23 ). Uncus wide, with extended semicircular bifurcation apically, apical halves diverging at right angle, wide, short, apices of uncus halves almost smooth; scaphium and subscaphium fused into long extended spindle-like tube; gnathos arms short, lamellar; gnathos lamellar, with long thin lateral processes; valve short, with equally rounded edges; saccular edge (in basal half) strongly sclerotized, tubulate, with pyramidal, apically acute harpe, directed dorsally; juxta lamellar, robust; saccus almost reduced; phallus 2.5 times shorter than valve, very thick, in distal third with robust spiky cornutus directed at right angle to phallus axis.

Female ( Fig. 15 ). Length of fore wing 14.5 mm. Antenna bipectinate, setae 1.5 times longer than antenna rod diameter. Pattern analogous to that of male, but significantly dimmer.

Female genitalia ( Fig. 26 ). Ovipositor very long, papillae anales semicircular, anterior apophyses almost equal to posterior apophyses in length, short, thick; antrum strongly sclerotized, elongated, funnel-shaped, slightly narrowing in medium third; ductus wide, smoothly passing into small bursa copulatrix, bursa without signa.

Diagnosis. The new species is most close to S. ihlei sp. nov. and S. csovarii sp. nov., from which it differs in the wider androconium portion in the cubital area. From S. loeffeleri it differs in the absence of small serrations on the phallus. Additionally, in contrast to other species, the females of which are known, the species is characterized by a weak sexual dimorphism.

Distribution. Thailand (Chiangmai Province).

Etymology. The new species is named after Bro. Amnuay Pinratana (1930−2017), ex headmaster of St. Gabriel's College, Bangkok, a well-known Thai entomologist, who oversaw the publication of a series of books on the nature of Thailand.

Figures

Figures 1−15. Adult specimens of Stueningeria: 1. S. nepalensis, male, Nepal, Annapura Himal (MWM); 2. S. nepalensis, male, Nepal, Annapura Himal (MWM); 3. S. nepalensis, male, India, Kumaon-Himalaya (MWM); 4. S. campbelli, female, holotype (NHMUK); 5. S. phaga, female, holotype (NHMUK); 6. S. phaga, male, India, Assam (NHMUK, individual number NHMUK: 012832501); 7. S. htetae, male, holotype (MWM); 8. S. csovarii, male, holotype (MWM); 9. S. csovarii, female, paratype (MWM); 10. S. loeffleri, male, holotype (MWM); 11. S. ihlei, male, holotype (ZISP); 12. S. murzini, male, holotype (MWM); 13. S. murzini, female, paratype (MWM); 14. S. pinratanai, male, holotype (MWM); 15. S. pinratanai, female, paratype (MWM).

Figures 20−23. Male genitalia of Stueningeria: 20. S. loeffleri, holotype (GenPr MWM: 32.908); 21. S. ihlei, holotype (slyde RYB 2017/5); 22. S. murzini, holotype (GenPr MWM: 28.018); 23. S. pinratanai, holotype (GenPr MWM: 32.906).

Figures 24−26. Female genitalia of Stueningeria: 24. S. campbelli, holotype (slide NHMUK: Coss-260♀); 25. S. csovarii, paratype (GenPr MWM: 32.907); 26. 23. S. pinratanai, paratype (GenPr MWM: 32.905).

Figures 27−32. Forewings of males of Stueningeria: 27. S. nepalensis, India; 28. S. htetae, holotype; 29. S. csovarii, holotype; 30. S. ihlei, holotype; 31. S. murzini, holotype; 32. S. pinratanai, holotype.