Petricola pholadiformis may also be known as the 'false angel wing'.
Method of introduction and spread
Petricola pholadiformis is a non-native, boring piddock that was unintentionally introduced from America with the American oyster, Crassostrea virginica, not later than 1890 (Naylor, 1957). Rosenthal (1980) suggested that from the British Isles, the species has colonized several northern European countries by means of its pelagic larva and may also spread via driftwood, although it usually bores into clay, peat or soft rock shores.
In Belguim and The Netherlands Petricola pholadiformis has almost completely displaced the native piddock, Barnea candida (ICES, 1972). However, there is no documentary evidence to suggest that native piddocks have been displaced in the British Isles (J.Light & I.Kileen pers. comm. to Eno et al., 1997).
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