49.080 Acleris hastiana (Sallow Button)
ws: 17-22mm (BTM), fw 9-11mm (Sterling & Parsons)*; bivoltine south of central Scotland Jun, Aug-Apr, univoltine north of central Scotland Sep-Apr; small-leaved willows (Salix spp); common throughout GB
* Specimens I have identified as this species have fw 7.3-9.2mm!
* Specimens I have identified as this species have fw 7.3-9.2mm!
Acleris hastiana §1
ID: highly polymorphic with ~80 forms recognised by Sheldon (1923) these forms intergrading to such an extent that it may not be possible to assign individuals to a particular form. 22 forms are illustrated in BTM. Some forms are similar to A.umbrana, A.abietana and the equally polymorphic A.cristana. A.umbrana can be distinguished by its evenly curved costa and tornal scale-tufts; A.abietana by its possession of distinctly roughened scales along the costa and more numerous scale-tufts; A.cristana by its convex costa and very large mid-wing scale-tuft.
Dissection
Male genitalia
Female genitalia
§1 Anglesey; 03/08/2007; fw 9.2mm
§2 Foulness, Essex; 13/07/2013; male; fw 8.3mm
§3 Foulness, Essex; 13/07/2013; female; fw 8.4mm
§4 Strumpshaw Fen, Norfolk; 10/07/2015; female; fw 8.6mm; to light
§5 Dungeness, Kent; 25/07/2017; to light
§6 Dungeness, Kent; 25/07/2017; male; fw 7.3mm; to light
All images © Chris Lewis
§2 Foulness, Essex; 13/07/2013; male; fw 8.3mm
§3 Foulness, Essex; 13/07/2013; female; fw 8.4mm
§4 Strumpshaw Fen, Norfolk; 10/07/2015; female; fw 8.6mm; to light
§5 Dungeness, Kent; 25/07/2017; to light
§6 Dungeness, Kent; 25/07/2017; male; fw 7.3mm; to light
All images © Chris Lewis
Page published 17/11/2012 (§1) | §2&3 added 19/12/2013 | §4 added 15/12/2015 | §5&6 added 13/04/2018
