Mimachrostia novofasciata Fibiger, 2010

FIBIGER, MICHAEL, 2010, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea) Part 3, Taxonomy of the Tactusinae, Zootaxa 2583 (1), pp. 1-119 : 92

Mimachrostia novofasciata Fibiger , new species

( Plate 11 , figure 7; male genit. plate 21, figure 2)

Material examined. Holotype: male, China, Prov. Hainan, Yinggeling, Ma Hou Ling, Camp 2, 960 m, 18º59’04 N, 109º24’14 E, 30.viii.2005, leg. & coll. R. C. Kendrick, genit. prep. 6165 M. Fibiger.

Diagnosis.Imago (external). Wingspan: 13 mm.

Forewing: beige, with light brown subterminal and terminal areas; with blackish brown areas basally and medially by costa (apo.).

Transverse lines: subterminal line indistinct, brown; subterminal line beige; terminal line indicated by brown interneural dots.

Reniform stigma: almost invisible, outlined by a few black scales.

Fringes: light brown.

Hindwing: greyish brown.

Underside: unicolorous grey, forewing dark grey.

Abdomen: grey, with black crest on first segment.

Male genitalia. Sternite: with a deep U shaped crest, with large posterior broad-based plate, apically setose (apo.).

Tergite: platelike, broad, irregular, anterior-laterally with four prominent processes (apo.).

Tegumen: strongly built.

Vinculum and saccus: strongly built, latter broad, V shaped.

Fultura superior: not visible.

Juxta-anellus plate: fused; three times wider than high; broadest ventrally, with narrow stringlike ring dorsally; with hole for phallus, displaced slightly to left.

Valvae: asymmetrical, left valva larger; ovoid, broadest medially.

Clasper: 90º to margins of valva.

Ampulla: prominently asymmetrical; left one larger, sicklelike; in extension of valva; dorso-basal with small, setose hump (apo.).

Digitus: short, fingerlike, left one larger.

Phallus: relatively long, strongly curved 120º (apo.), coiled clockwise, slightly tapered, with crestlike plate by ductus ejaculatorius.

Vesica: armed basally with one small triangular cornutus (apo.).

Bionomics. Known specimen recorded in primary forest, with a canopy of 25 m.

Differential diagnosis. M. novofascia is lightest coloured species, externally unlike other Mimachrostia species. However, genitalia character states suggest a basal lineage, with M. costafasciata as its sister-species, although remarkable apomorphies described above make it unique.

Distribution. Known only from type-locality on Hainan.

Figures

PLATE 11. Figures 1–8. Duplex, Sinochrostia, and Mimachrostia species, adults. 1, 2, D. cockingi, males holotype and paratype, Australia, New South Wales, 11 km SW Narrabri, and Australia, Queensland, 3 km NE Ravensbourne; 3, 4, Sinochrostia sichuanensis, females holotype and paratype, China, Prov. Sichuan, Mt. Emeishan, and China, Prov. Hunan, Suoxiyu; 5, Mimachrostia fasciata minimus, male holotype, Japan, Tsushima Isl., Kamiagata; 6, M. f. fasciata Sugi, 1982, Japan, Shikoku, Ehime; 7, M. novofasciata, male holotype, China, Prov. Hainan, Yinggeling.