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Urnatella gracilis
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Urnatella gracilis
Taxonomic Group: Entoprocts


Urnatella gracilis is a freshwater kamptozoan that can survive in brackish waters. It was first described from the Schuylkill River near Philadelphia, Pennsylvania in 1851 and is thought to be native to Eastern North America. Introduced populations have been reported from California, Oregon, Japan, France, Germany, the Black Sea, the Sea of Azov, and Brazil. Likely vectors include aquatic plants and freshwater canals. This species can be found on algae, stones, twigs and mollusk shells. No impacts have been reported in its native or introduced ranges.

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

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