Tactusa discrepans subsp. yunnanensis Fibiger, new subspecies
Creators: name: Fibiger, Michael
name: Han, Hui-Lin
name: Kononenko, Vladimir S.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Micronoctuidae
Tactusa
Tactusa discrepans
Tactusa discrepans yunnanensis fibiger

description: Tactusa discrepans yunnanensis Fibiger, new subspecies
(Figs. 9, 10, 19, 23)
Material examined. Male. China, Yunnan prov., Jiangcheng, 15–17.ix.2008, leg. Han, H.L., Qi, M. J. & Liu, E., genit. preps 6215 M. Fibiger, coll. NEFU. Paratypes. 3 males, with same data as holotype, genit. preps, 6216, 6217, 6218 M. Fibiger, colls NEFU and M. Fibiger; 3 female, China, Guizhou prov, Huangguoshu, 24–26.ix.2008, leg. Han, H.L. & Qi, M. J., genit. prep. 6225, 6227, 6231 M. Fibiger, colls NEFU and M. Fibiger.
Diagnosis. Extermally it is similar to T. discrepans. In the genitalia the tegumen is narrow, relatively short (shorter than that of subsp. discrepans); valva without a setose hump near clavus area (a setose hump present in subsp. discrepans); ampullae relatively narrow and rounded at tips (in subsp. discrepans broader and more pointed at tips); juxta narrower than that of subsp. discrepans; coecum of phallus short, broad, triangular (in subsp. discrepans longer and narrower); phallus basally at ventral side with hump (straight in subsp. discrepans), and phallus less curved compared with that of subsp. discrepans. The female genitalia has not been known before. Ovipositor broad, rounded, setose; posterior apophyses as long as ovipositor; anterior apophyses slightly shorter than posterior apophyses; 8th abdominal segment separate from 7th segment; 8th abdominal segment narrow, 5 times wider than long; ostium round, positioned anteriorly on 8th abdominal segment; ostium round, positioned at anterior end of 8th abdominal segment; antrum tapered slightly throughout, projected slightly to the left; ductus bursae long and narrow, 2.5 times as long as corpus bursae; corpus bursae ovoid, with cross-shaped signum.
Description. Adults (Fig. 9, 10). Wingspan: 9.5– 12 mm. Head, thorax, and ground colour of forewing light brown; costa-medial and area outward and to tornus black and brown; antemedial line invisible; postmedial line beige, almost straight; subterminal line broad, black, waved; terminal line marked by black interveinial dots; fringe black. Hindwing unicolourous grey, with discal spot; fringe grey. Ventral surface unicolourous brown.
Male genitalia (Fig. 19). Described in comparison with T. discrepans discrepans. Tegumen narrow, relatively short (much shorter than that of ssp. discrepans); vinculum, and saccus equally narrow, the latter V-shaped; valvae broadest medially, asymmetrical, right valva shorter; valva without a setose hump near clavus area (present in ssp. discrepans); valva with small subbasal process, positioned next to junction of tegumen and vinculum; ampullae relatively narrow and rounded at tips (in ssp. discrepans broader and more pointed at tips); digitus heavily sclerotised, rounded; juxta narrower than that of subsp. discrepans; coecum of phallus short, broad, triangular (in ssp. discrepans longer and narrower); phallus basally at ventral side with hump (straight in ssp. discrepans), phallus less curved compared with that of subsp. discrepans; vesica unarrmed.
Female genitalia (Fig. 23). Previously unknown. Ovipositor broad, rounded, setose; posterior apophyses as long as ovipositor; anterior apophyses slightly shorter than posterior apophyses; 8th abdominal segments separated from 7th segment; 8th abdominal segment narrow, 5 times wider than long laterally; ostium round, positioned at anterior end of 8th abdominal segment; antrum tapers slightly throughout, projects slightly to left; ductus bursae long and narrow, 2½ times longer than corpus bursae; corpus bursae ovoid, with cross-shaped signum.
Bionomics. The biotope is dominated mainly by broad-leaf trees, shrubs and many herbaceous plants, close to a river. All specimens were collected at light in mid September. The early stages are unknown.
Distribution (Fig. 30) China (Yunnan prov.). The nominate subspecies occurs in northern Thailand.
description: Published as part of Fibiger, Michael, Han, Hui-Lin & Kononenko, Vladimir S., 2011, Five new species and one new subspecies of Micronoctuidae from China, with a checklist of Chinese species, including Taiwan (Lepidoptera: Noctuoidea, Micronoctuidae), pp. 41-53 in Zootaxa 2777 on pages 46-47, DOI: 10.5281/zenodo.276927