Insects of Britain and Ireland: the genera of Lepidoptera-Noctuidae
Adults. Head smooth. Head with a frontal tuft. Eyes glabrous; not ciliated. Antennae of males shortly ciliate. Tongue well developed. Labial palps very long; at least three times as long as the diameter of the eyes; porrect.
Wingspan 22–28 mm. Thorax coloured light-and-dark like the forewings, the abdomen grey like the hindwings. Forewings whitish and dark fuscous or greyish, blackish or brownish, sometimes purplish-tinged; complexly patterned; the patterning well marked (marbled and lined); reniform undefined; orbicular defined (seemingly, as a dark dot), or undefined. Hindwings light grey; terminally darkened; without a clear discal mark; without transverse lines; lacking vein 5. Vein 5 of the hindwings convergent on vein 4 near their bases. Retinaculum of males represented by a sub-median tuft of hairs. Thorax crested (a small, posterior crest). Middle tibiae without spines. Posterior tibiae without spines.
Living adults found July to December, or January to April (hibernating).
Larvae, pupae. Larvae conspicuously hairy (with a few long whitish hairs on each segment); feeding on the foliage of Quercus and Salix; pupating on vegetative parts of the foodplant (in a boat-shaped cocoon).
British representation. 2 species (one adventive); South-east England, Central-southern England, South-west England, English Midlands, Northern England, Southern Scotland, Northern Scotland, Wales, and Ireland; degenerana* (Sallow Nycteoline), revayana (Oak Nycteoline, Large Marbled Tortrix).
Illustrations. • Nycteola revayana var. ramosana (Oak Nycteoline: B. Ent. 29). • Nycteola revayana var. ramosana: B. Ent. 29, legend+text. • Nycteola revayana var. ramosana: B. Ent. 29, text cont..
To view the illustrations with detailed captions, 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.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. Insects of Britain and Ireland: the genera of Lepidoptera-Noctuidae. Version: 8th June 2016. delta-intkey.com’.