009 Nycteola revayana (Oak Nycteoline)

NOLIDAE: Chloephorinae: Sarrothripini

74.009 Nycteola revayana (Oak Nycteoline)

fw: 11-13mm; Jul-Jun, possibly bivoltine in south, overwinters as adult; pedunculate oak (Quercus robur); local in broadleaved woodland throughout GB.

Nycteola revayana (Oak Nycteoline) §5 male

ID: Recognized more by its size and shape with a strongly ‘shouldered’ forewing costa than by the extremely variable forewing pattern. May be confused with Acleris species (Family: Tortricidae) which are slimmer and usually smaller - A.cristana has a central forewing scale-tuft, A.hastiana has much shorter labial palps. §10 closely resembles N.asiatica (Eastern Nycteoline) in forewing pattern, but that species has a much less steeply arched costal base (shoulder)
Female genitalia: based on comparing images at Moth Dissection, the main difference between N.revayana and N.asiatica is in the sclerotisation in the ductus bursae. In both there is a ~quadrangular spiculate patch; in N.revayana this patch is more elongate (3-4x longer than wide) and there is an additional smaller patch in a diverticulum anterior to it; in N.asiatica the patch is broader (<2x as long as wide) and there is no additional anterior patch.

Variation
Dissection
Male genitalia
Female genitalia

§1 Strumpshaw Fen, Norfolk; 14/07/2008; fw 11.5mm
§2 Westcliff-on-sea, Essex; 30/06/2010; fw 11.7mm; female
§3 Winterton, Norfolk; 06/08/2015; female; fw 10.7mm; to light
§4 Winterton, Norfolk; 06/08/2015; male; fw 10.1mm; to light
§5 Ide, Devon; 19/09/2017; male; fw 10.8mm; to light
§6 Ide, Devon; 19/09/2017; male; fw 10.6mm; to light
§7 Cranwich Heath, Norfolk; 05/07/2018
§8 Pound Wood, Essex; 01/05/2019; female; fw 10.1mm
§9 Foulness, Essex; 08/07/2023
§10 St Mary's, Isles of Scilly; 09/10/2023; female; fw 11.8mm
§11 St Mary's, Isles of Scilly; ??/??/2024; male; fw 11.1mm; specimen provided by Mick Scott
All images © Chris Lewis