Dichagyris (Albocosta) musichuana Gyulai, 2021, sp. n.
Creators: name: Gyulai, Péter
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Noctuidae
Dichagyris
Dichagyris musichuana

description: Dichagyris (Albocosta) musichuana sp. n.   
(Figs 11-12, 30-31)  
 Holotype. Male (Fig. 11), China, Sichuan, W Bamei Mts., 3750 m, 10.VIII.2005, leg. S. Murzin, slide no. GYP 5276 (coll. PGYM, later to be deposited in the HNHM).   
 Paratype. Male, with the same data, slide no. GYP 5228 (coll. PGYM).   
 Diagnosis. Dichagyris (A.) musichuana sp. n. (Figs 11-12) is the southern vicariant species of the northern D. (A.) musivula (Figs 9-10). The new species is significantly larger than D. musivula; forewing length 16-17 mm and 12-14 mm, respectively. Additionally, the black basal dash in forewing is conspicuously stronger, costal stripe broader, whitish – pale ochre; antemedial, postmedial and subterminal transverse lines are more defined in the new species, particularly the latter one, which is brown and more wavy.   
 In the male genitalia (Figs 30-31), the main differences are in the vesica configuration; the new species has larger, broad based subbasal diverticulum with larger endcornutus and almost twice thicker tubular section of the vesica than in the D. musivula (Figs 28-29).   
 Description (Figs 11-12). Forewing length 16-17 mm, wingspan 32-33 mm. Eyes globular, black; antennae light brown, finely setose-ciliate. Palpi covered with red-brown scales, third segment very tiny. Vertex brown, dark brown, collar black with broad yellow base, thorax vesture and legs red-brown, with long rows of dorsal setae; abdomen vesture pale ochre-brown. Forewing triangular, apex pointed. Ground colour of forewings dark red-brown, slightly lighter in the subterminal area. Costa broadly whitish until the tip of the reniform stigma, conjoining with the also whitish orbicular macula and the whitish-brownish reniform stigma. Claviform stigma is not visible. Basal dash black, broad, conspicuous. Transverse lines obscure, since only slightly lighter than the ground colour; antemedial line wavy, postmedial line slightly arched, subterminal line finely lacy; fringe brown. Hindwing whitish brown suffused in the basal area, then more and more dark towards the marginal field, without discal spot and medial line; fringe pale brown.   
Male genitalia (Figs 30-31) characterized by the long, thin uncus with a long but slight depression in the distal section and a bunch of long hairs terminally; broad tegumen; broad juxta with slight dorsal-medial depression and small ventral medial extension; rather short, strong clavus, V-shaped vinculum; almost evenly broad, medially slightly broaden valvae with large slightly falciform harpe, slight ampulla, triangular, apically pointed pollex; cucullus section with corona; rather short, tube-like, distally slightly ventrad curved aedeagus; ample, subquadrangular vesica, with a basal-subbasal eversible sclerotized streak and one subbasal asymmetrically drop-like diverticulum apically armed with a cornutus on a longish base; distal part of vesica long, tubular, evenly broad, membranous, without apical diverticulum.  
Female is unknown.  
 Bionomics and distribution. The new species is known from the type locality only.   
 Etymology. The new species is named as a combination of the name of the close relative D.(A.) musivula and the name of province, in which it was found.
description: Published as part of Gyulai, Péter, 2021, Notes on the subgenus Albocosta Fibiger & Lafontaine 1997, with descriptions of five new taxa from Asia (Lepidoptera, Noctuidae), pp. 26-45 in Ecologica Montenegrina 40 on pages 33-34, DOI: 10.37828/em.2021.40.2, http://zenodo.org/record/13232968