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Petricolaria pholadiformis
Image courtesy of Wikimedia Commons from Manfred Heyde, via the Creative Commons CC BY-SA 3.0 License
Petricolaria pholadiformis
Taxonomic Group: Mollusks-Bivalves


Petricolaria pholadiformis is commonly known as the False Angelwing and the American Piddock. It is native to the Northwest Atlantic from Chaleur Bay, Canada to Florida and Texas. Introduced populations are known from Europe and the Western Coast of North America (California - British Columbia). The most likely vectors for the introduction of this species are accidental transport with the Eastern Oyster (Crassostrea virginica) and ballast water discharge. This species is primarily found burrowing in mud, peat, stiff clay, or soft rock. Adults live completely buried in the substrate, feeding and breathing through their two siphons. There are no or few reported impacts of this species in its introduced range.

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Fofonoff PW, Ruiz GM, Steves B, Simkanin C, & Carlton JT (2018)
National Exotic Marine and Estuarine Species Information System.
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Marine Invasions Lab
Smithsonian Environmental Research Center

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