Psychidarbela dangvani Yakovlev & Hulsbosch, 2024

Yakovlev, Roman V. & Hulsbosch, Ramon, 2024, Revision of the family Metarbelidae (Lepidoptera) of the Oriental Region. XII. New species of Psychidarbela Roepke, 1938 from Vietnam, Ecologica Montenegrina 77, pp. 110-112 : 111-112

Psychidarbela dangvani Yakovlev & Hulsbosch , sp. n.

https://zoobank.org/ urn:lsid:zoobank.org:act:F8DC8C89-3233-436C-90DC-DF8F158544CC

Figs 1−2

Material examined. Holotype, male, Vietnam, Nghệ An province , Tuong Duong, coll. Dang Ngoc Van (RHE) . Paratypes: 2 males, same locality (RHE) .

Description. Male. Length of fore wing 12 mm. Basal portion of antenna bipectinate (setae three times longer than antenna stem in diameter), distal half of antenna simple, filiform. Thorax and abdomen densely covered with thick black scales. Fore wing transparent, costal edge black along all length, anal angle with wide black field reaching vein CuA 2. Hind wing short, transparent, with black costal and anal edges.

Male genitalia. Uncus long, basally narrow, evenly narrowing slightly from base to apex; tegumen robust, dome-like, gnathos arms very thick, hypertrophied, with robust folds on sides; gnathos very large; valve narrow, lanceolate, with almost smooth costal and abdominal edges, all middle portion of valve (except costal and abdominal edges and basis) poorly sclerotized; juxta tiny with small leaf-like lateral processes; saccus tiny, semicircular; phallus of medium thickness, shorter than valve, poorly narrowing from base to apex, apex spear-shaped, acute, vesica aperture narrow slit-like, vesica without cornuti.

Female unknown. Diagnosis. Externally, the new species is close to P. pellucida (Nonaka, 2021) ( Yakovlev et al. 2023: Figs 8, 12), from which it differs in a series of characters:

- the lanceolate valve with smoothly rounded apex (in P. pellucida the valve has a thin drawn apex),

- the tiny semicircular apex (in P. pellucida the saccus is pyramidal, tiny).

Etymology. New species named after Mr. Dang Ngoc Van ( Vietnam) who collected there specimens.

References

Kristensen, N.P. (2003) Skeleton and muscles. In: Kristensen N.P. (Ed.). 36. Lepidoptera, moths and butterflies. 2. Morphology, physiology, and development. Handbuch der Zoologie / Handbook of zoology, IV. Arthropoda: Insecta: 39–131. Berlin & New York: Walter de Gruyter.

https://doi.org/10.1515/9783110893724.39

Lafontaine, J.D. & Mikkola, K. (1987) Lock–and–key system in the inner genitalia of Noctuidae (Lepidoptera) as taxonomic character. Entomologiske Meddelelser, 55, 161–167.

Yakovlev, R.V., Hulsbosch, R. & Zolotuhin, V.V. (2023) Revision of the family Metarbelidae (Lepidoptera) of the Oriental Region. XI. Genus Psychidarbela Roepke, 1938. Ecologica Montenegrina, 65, 51−59. https://dx.doi.org/10.37828/em.2023.65.7

Figures

Figure 1. Psychidarbela dangvani Yakovlev & Hulsbosch, sp. n.: 1. Male, Holotype.

Figure 2. Psychidarbela dangvani Yakovlev & Hulsbosch, sp. n.: Male genitalia.