49.313 Dichrorampha acuminatana (Common Daisy Moth)
ws: 10-15mm; bivoltine May-Jun, Aug-Sep; ox-eye daisy (Leucanthemum vulgare), tansy (Tanacetum vulgare); local throughout GB
Synonym: Hemimene acuminatana (Pierce & Metcalfe)
Synonym: Hemimene acuminatana (Pierce & Metcalfe)
Dichrorampha acuminatana §1 male
ID: Named from the acuminate (tapering to a point) apex of the forewing; also characterised by the dark purplish-brown colour and sharply demarcated grey apices of the cilia. D.consortana is similar, averages smaller (ws 9-12mm), darker and browner, and has more diffuse apical and subbasal dark lines in the terminal cilia. However, genital dissection is required for confident separation of these species.
Male genitalia: D.consortana has a much deeper emargination of the ventral edge of the valva and a much narrower neck. Width of neck at narrowest point just under 1/2 length of cucullus in D.acuminatana, ~1/4 in D.consortana.
Female genitalia: Anterior margin of ostium smoothly "wide-U"-shaped in D.acuminatana; angular with a deep central U in D.consortana.
Male genitalia: D.consortana has a much deeper emargination of the ventral edge of the valva and a much narrower neck. Width of neck at narrowest point just under 1/2 length of cucullus in D.acuminatana, ~1/4 in D.consortana.
Female genitalia: Anterior margin of ostium smoothly "wide-U"-shaped in D.acuminatana; angular with a deep central U in D.consortana.
§1 Westcliff-on-sea, Essex; 02/05/2012; male; fw 7.2mm
§2 Foulness, Essex; 30/05/2020; female; fw 5.9mm
§3 Housel Bay (Lizard), Cornwall; 22/09/2020; male; fw 6.6mm
§4 Westcliff-on-sea, Essex; 01/06/2021
All images © Chris Lewis
§2 Foulness, Essex; 30/05/2020; female; fw 5.9mm
§3 Housel Bay (Lizard), Cornwall; 22/09/2020; male; fw 6.6mm
§4 Westcliff-on-sea, Essex; 01/06/2021
All images © Chris Lewis
Page published 11/02/2013 (§1) | §2 added 09/06/2020 | §3 added 13/11/2020 | §4 added 25/11/2021
