49.150 Apotomis betuletana (Birch Marble)
ws: 17-22mm; Jul-Sep; birch (Betula spp); common in birch woods and heaths throughout GB
Synonym: Apotomis betulaetana (Pierce & Metcalfe)
Synonym: Apotomis betulaetana (Pierce & Metcalfe)
Apotomis betuletana §4 male
ID: Similar to A.capreana; distinguishing these two species can be achieved on the following features, those for A.betuletana given first: 1) posterior margin of median fascia fairly straight vs concave; 2) hook-like indentation near middle of posterior margin of median fascia weak vs strong; 3) black dots in subterminal fascia absent or weak vs stronger; 4) basal 2/3 more strongly marked with black vs less black. A.turbidana is similar but distinguished by its basal white costal markings. A.sororculana has a black apex.
Male genitalia: there do not seem to be any convincing differences between A.betuletana and A.capreana
Female genitalia: the posterior margin of the ostium is truncate in A.betuletana, pointed/produced posteriorly in A.capreana.
Male genitalia: there do not seem to be any convincing differences between A.betuletana and A.capreana
Female genitalia: the posterior margin of the ostium is truncate in A.betuletana, pointed/produced posteriorly in A.capreana.
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§1 Newborough Forest, Anglesey; 30/07/2007; fw 9.2mm
§2 Newborough Forest, Anglesey; 01/08/2007; fw 9.2mm §3 Eskdale, Cumbria; 24/08/2007; fw 9.4mm §4 Ardnamurchan, Highland; 10/07/2012; male §5 Foulness, Essex; 05/08/2012; female §6 Foulden Common, Norfolk; 14/08/2016; male §7 Seathwaite, Cumbria; 27/07/2016; male; fw 8.9mm §8 Orlestone Forest, Kent; 07/07/2019; male All images © Chris Lewis |
§9 Cliburn Moss, Cumbria; 02/09/2022; male; fw 9.2mm
§10 Cliburn Moss, Cumbria; 02/09/2022; male; fw 9.2mm §11 Cliburn Moss, Cumbria; 02/09/2022; female; fw 9.4mm §12 Covert Woods, Kent; 24/07/2022 |
Page published 08/01/2013 (§1-5) | §6 added 16/04/2017 | §7 added 28/06/2017 | §8 added 30/01/2020 | §9-11 added and text amended 01/12/2022 | §12 added 21/12/2022
