49.245 Epinotia tetraquetrana (Birch-borer Tortrix)
ws: 12-16mm (MBGBI5.2), fw: 5.5-7.5mm (Sterling & Parsons); Apr-May; birch (Betula spp), alder (Alnus glutinosa); common throughout GB
Epinotia tetraquetrana §1 male
ID: Similar to E.immundana which averages smaller (ws: 12-14mm, fw 5.5-7.0mm). The dorsal blotch in E.tetraquetrana is subquadrate with its basal margin at 60-90° to the dorsum; in E.immundana it is triangular with its basal edge at 45° to the dorsum.
Male genitalia: Small cluster of saccular spines; neck of valva obviously narrower than cuculus.
In E.immundana there are saccular spines all along the outer half of the saccular margin and the neck is not much narrower than the cucullus.
Male genitalia: Small cluster of saccular spines; neck of valva obviously narrower than cuculus.
In E.immundana there are saccular spines all along the outer half of the saccular margin and the neck is not much narrower than the cucullus.
§1 Chobham Common, Surrey; 23/05/2017; male; fw 6.1mm; to light
§2 New Forest, Hampshire; 15/05/2018; male; fw 6.6mm; to light
§3 Orlestone Forest, Kent; 18/05/2020; female; fw 7.0mm
§4 Arrochar, Argyll; 11/06/2021; male; fw 6.6mm; to light
§5 Loch Rannoch, Perthshire; ??/06/2021; female; fw 7.1mm; to light
§6 Cliburn Moss, Cumbria; 12/05/2022
§7 Bringsty Common, Herefordshire; 08/05/2024
§8 Cliburn Moss, Cumbria; 11/05/2024; fw 7.2mm
All images © Chris Lewis
§2 New Forest, Hampshire; 15/05/2018; male; fw 6.6mm; to light
§3 Orlestone Forest, Kent; 18/05/2020; female; fw 7.0mm
§4 Arrochar, Argyll; 11/06/2021; male; fw 6.6mm; to light
§5 Loch Rannoch, Perthshire; ??/06/2021; female; fw 7.1mm; to light
§6 Cliburn Moss, Cumbria; 12/05/2022
§7 Bringsty Common, Herefordshire; 08/05/2024
§8 Cliburn Moss, Cumbria; 11/05/2024; fw 7.2mm
All images © Chris Lewis
Page published 29/03/2018 (§1) | §2 added 07/03/2019 | §3 added 16/01/2021 | §4 added 04/10/2021 | §5 added 11/10/2021 |
§6 added 07/12/2022 | §7&8 added 21/11/2024
§6 added 07/12/2022 | §7&8 added 21/11/2024
