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Acidia cognata (Wiedemann, 1817) [Diptera: Tephritidae] Tephritis cognata Wiedemann, 1817. Zool. Mag. 1: 75. Acidia cognata (Wiedemann, 1817); White, 1988. Handbk ident. Br. Ins. 10(5a): 24, 36.

Leaf-mine: An upper surface corridor mine, becoming strongly broadened and blotch-like. The mine can occupy a considerable part of a small leaf. Mines frequently merge and then accommodate several larvae. Pupation external, in the soil. The mine is illustrated in British leafminers and Nederlandse bladmineerders. Mine of Acidia cognata on Tussilago farfara. Images: Willem Ellis (Source: Nederlandse bladmineerders) Larva: The larva is illustrated in Nederlandse bladmineerders. Puparium: Yellow; anterior spiracle openings arranged in large arcs, not elevated on a fan-like structure; posterior spiracles each with a central opening larger and more raised than the lateral openings. Hosts in Britain: Asteraceae       Petasites     Robbins, 1991: 110 Petasites     Uffen, 1978: 222 Petasites fragrans Butterbur Mines in BMNH Petasites fragrans Butterbur White, 1988: 59 Petasites hybridus Winter Aconite White, 1988: 59 ? Senecio vulgaris Common Ragwort Robbins, 1991: 109 Tussilago     Robbins, 1991: 110 Tussilago     Uffen, 1978: 222 Tussilago farfara Colt's-foot Mines in BMNH Tussilago farfara Colt's-foot White, 1988: 59 Hosts elsewhere: Asteraceae       Arctium lappa Greater Burdock White, 1988: 59 Homogyne     Hering, 1957a Homogyne     White, 1988: 59 Petasites     Hering, 1957a Petasites hybridus Winter Aconite Nederlandse bladmineerders ? Senecio     Hering, 1957a ? Senecio     White, 1988: 59 Tussilago     Hering, 1957a Tussilago farfara Colt's-foot Nederlandse bladmineerders Time of year - mines: October-November. Time of year - adults: May-June. Distribution in Britain: Throughout the British Isles (White, 1988) including Warwick (Sutton Park and Corley) (Robbins, 1991: 110), West York (Cromwell Bottom LNR) and Cumbria (Roudsea Wood and Mosses NNR) (British leafminers), Berks, Bucks, Dorset, East Gloucester, East Kent, Easterness, Hunts, Isle of Wight, North Hants, South Wilts, South-west York and Surrey (NBN Gateway distribution map - BRERC, DF, SNH, NE and NESBRC). Also recorded in the Republic of Ireland (Merz & Korneyev, 2004 in Fauna Europaea). Distribution elsewhere: Widespread in Europe including The Netherlands (de Meijere, 1939), Belgium (Leclercq & de Bruyn, 1991), Luxembourg (Nederlandse bladmineerders), Albania, Austria, Bulgaria, Czech Republic, Denmark, Finland, French mainland, Germany, Hungary, Italian mainland, Lithuania, Norwegian mainland, Poland, Romania, Russia - Central, Slovakia, Sweden, Switzerland and Ukraine (Merz & Korneyev, 2004 in Fauna Europaea). Parasitoids: Chrysocharis illustris Graham, 1963 Hymenoptera: Eulophidae Xestomnaster chrysochlorus (Walker) Hymenoptera: Pteromalidae

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Last updated 16-Aug-2008  Brian Pitkin