Author: (Meyrick, 1907)
Species Overview:
Adult: 18-25 mm wingspan; forewing ground colour silvery-grey, irrorated with white and with dark fuscous strigulae, and with a broad dark brown suffusion extending over costal half of wing from near base to two-thirds, then suddenly contracted and continued as a narrow and less defined costal suffusion to apex. Males with costal fold. Hindwings fuscous, darker posteriorly.
Larva: 13-15 mm long; head capsule brownish yellow; thorax and body dark reddish brown, each segment of abdomen bearing two tiny white spots dorsally; also well presented a rather similar spot on spiracles with several whitish hairs [Eucoenogenes ancyrota larva ].
Taxonomic Description:
Male:
Eucoenogenes ancyrota adult
External characters: 18-25 mm wingspan. Head light brownish; thorax grey-whitish, with two dark grey dorsal dots; abdomen grey. Forewing elongate, narrow, gradually dilated, termen subsinuate, little oblique; with strong costal fold reaching from base to middle of costa. Ground colour silvery-grey, irrorated with white and with more or less distinct dark fuscous strigulae; a broad dark brown suffusion, mixed with leaden, extending over costal half of wing from near base to two-thirds, then suddenly contracted and continued as a narrow and less defined costal suffusion to apex; posterior half of costa with pairs of short whitish strigulae; an irregular fuscous spot in disc, resting on edge of dark costal suffusion; a curved black linear mark from angle of costal suffusion at two-thirds; a series of six or seven short black linear marks before termen; a small fuscous apical spot. Cilia grey, irrorated with white, suffused with white towards base, on upper part of termen suffused with brown towards tips. Hindwings fuscous, darker posteriorly; cilia fuscous, with pale basal line (Meyrick, 1907).
male genitalia E. ancyrota
valvae natural position (showing position of spines)
Genitalia: Tegumen broad. Uncus notched apically; socii small. Neck of valva well developed; cucullus very broad, short; armed with several short spines on outer margin (inner surface), and several long spines on outer surface. Aedeagus short, thick, with several long cornuti.
Female:
External characters: Similar to male; forewing without costal fold.
female genitalia E. ancyrota
Genitalia: Sterigma with long lateral projections posteriorly; antrum well sclerotized; cingulum large, with some small spines, situated medially in ductus bursae. Corpus bursae pyriform, with two strong signa. Spines on surface of corpus bursae unequal in size: spines on median part very small, these surrounded by ring of large spines, all arranged in same direction; anterior part of ductus bursae with small spines which are not arranged orderly.
Biology:
In Korea, larvae feed on the leaves of Ternstroemia japonica. Larvae of the first generation are present by mid May. They tie 2-3 leaves together to construct a shelter. Mature larvae pupate in their feeding site from late May to early June. Adults emerge after 7-10 days. Most adults are on wing by mid June (Bong-Kyu and Chang-Hoon, 1999).
In Japan, there are 2-3 generations per year (present in June, July and August), and the species overwinters in the pupal stage.
Host plants:
Ternstroemia spp. (Theaceae).
Damage:
Larvae feed on the leaves of the host plant, tying them together to construct shelters.
Distribution:
India, Sri Lanka, Japan, Korea, Burma, Thailand, W. Malaysia, Brunei (Robinson et al., 1994).
Pheromone:
Pheromone unknown.