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Phytomyza wahlgreni Rydén, 1944 [Diptera: Agromyzidae] Phytomyza wahlgreni Rydén, 1944. Opusc. ent. 9: 49. Phytomyza taraxacocoecis Hering, 1949d. Notul. ent. 29: 29. [Synonymised by Spencer, 1976: 527] Phytomyza taraxacocoecis Hering, 1949d; Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 71, 85 (fig. 283), 87, 88, 115. Phytomyza wahlgreni Rydén, 1944; Spencer, 1976. Fauna ent. Scand. 5(1): 527-8, figs 921-2. Phytomyza wahlgreni Rydén, 1944; Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 259, 267, 268 (figs 1011-2).

Gall-former: Larva feeding in the mid-rib or flower stalk where a gall-like swelling is produced (see also Redfern et al., 2002: 453, fig. 914). Pupation at base of leaf, near exit hole prepared by larva prior to pupation (see also Redfern et al., 2002: 453, figs 915). Larva: Details unknown. Puparium: Details unknown. Hosts in Britain: Asteraceae       Taraxacum officinale Dandelion Spencer, 1972; 115 Hosts elsewhere: Asteraceae       Taraxacum     Spencer, 1976: 527 Taraxacum     Spencer, 1990: 259 Taraxacum officinale Dandelion Nederlandse bladmineerders Time of year - mines: Unknown. Time of year - adults: Unknown. Distribution in Britain: Widespread, at least in south. London (Hampstead), Herts (New Barnet), Hants (New Forest), Dorset (Studland), Suffolk (Newmarket) (Spencer, 1972b: 87, as taraxacocoecis), Cornwall and Westmoreland (NBN Gateway distribution map - DF). Also recorded in the Republic of Ireland (Martinez in Fauna Europaea). Distribution elsewhere: Holarctic. Europe from Swiss Alps to Faroe Is., including Denmark, Finland, Norway, Sweden (Spencer, 1976: 527), Germany (Spencer, 1976: 582), Belarus, Czech Republic, Estonia, French mainland, Italian mainland, Lithuania and Poland (Martinez in Fauna Europaea). Also recorded from the East Palaearctic and Nearctic Region (Martinez in Fauna Europaea). Parasitoids: Unknown.

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Last updated 19-Aug-2008  Brian Pitkin