British Insects: the Families of Lepidoptera
Adults relatively long-bodied; relatively slender-bodied (wingspan more than 15 times the thoracic width); conspicuously raising the hind-legs above the body in repose; wings in repose packed with the forewings directed backwards to cover hindwings and abdomen.
Head smooth (shiny). Antennae of medium length to long; extending to about about 0.75 times the length of the forewing. Antennae of males simple; simply-ciliate (with long, fine cilia). The antennal scape without a pecten; not forming an eye cap. Ocelli absent. Chaetosemata absent (?). Maxillary palps much reduced; 1 segmented. Labial palps well developed (very long); ascending (recurved); 3 segmented (?). Proboscis fully developed; scaly towards the base.
Wingspan 10–14 mm; 15–17 times the thoracic width. Forewings very narrow; about 12 times as long as wide. Tornus undetectable. Ground colour predominantly yellow, or light brown (ochreous-yellow). Hindwings narrow-elongate and very long-fringed; linear-lanceolate; very much narrower than the forewings to quite markedly narrower than the forewings; with a pointed apex. The fringe of the hindwings about 6 times the width of the membrane. The upper surfaces plain; with neither discal spot nor transverse lines; hindwings with a frenulum.
Neuration of forewings and hindwings dissimilar. Forewings 12 veined; with 2 anal veins. The anal veins of the forewings comprising 1b and 1c. Forewings exhibiting a tubular vein 1c. Vein 1b of the forewings simple. The transverse vein complete. Discal cell of the forewings without a tubular media (M) vein. Hindwings 8 veined; with 1 anal vein. The anal veins of the hindwings representing 1b only. Hindwings lacking vein 1a; lacking a tubular vein 1c. Vein 1b of the hindwings furcate proximally. The transverse vein incomplete (open between veins 5 and 6). 6 veins arising from the hindwing cell. The cell-derived hindwing veins all arising independently of one another. Vein 8 of the hindwings completely independent of the cell; not approximating to vein 7.
Fore-legs with a tibial epiphysis. Tibiae of middle legs 2-spurred. Posterior tibiae 4-spurred; hairy (with rough, bristly hairs).
Eggs, larvae and pupae. Larval prolegs 10. Larvae concealed feeders (in Alnus fruits). Associated with Alnus.
Pupae concealed (in a silken cocoon); on the surface of the ground, or above the ground (?). Empty pupae protruded from place of concealment.
British representation. Genera 1 (Stathmopoda); 1 species.
Classification. Microlepidoptera. Suborder Ditrysia. Superfamily Gelechioidea.
Comments. Hind-legs with whorls of bristles at the apex of each tarsal segment.
Illustrations. • Stathmopoda pedella. • Stathmopoda pedella, details.
To view illustrations with legends giving names in current use, go to the interactive key. This also offers full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa, as well as source references and other relevant material.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. British insects: the families of Lepidoptera. Version: 29th December 2011. http://delta-intkey.com’.