Pectinatella magnifica
Pectinatella magnifica
(magnificent bryozoan)
Native Transplant
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Pectinatella magnifica (Leidy, 1851)

Common name: magnificent bryozoan

Taxonomy: available through www.itis.govITIS logo

Identification: Sessile, colonial organism with ciliated tentacles attached to a large gelatinous mass (Pennak 1989; Wood 2010). 

Native Range: P. magnifica was once restricted to warm freshwater systems east of the Mississippi, but now appears to be well established across North America (Pennak 1989; Wood 2010). 

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Interactive maps: Point Distribution Maps

Nonindigenous Occurrences: Pectinatella magnifica has been found in Texas (Neck and Fullington 1983). In 2002, a more extessive survey was conducted where this species was found in a total of 18 lakes in the Pacific Northwest that included the states of Idaho, Oregon, Washington (Marsh and Wood 2002). Outside the U.S., it has been found in Canada, Europe, and Asia (T. Wood, pers. comm.).

Ecology: Found in freshwater lakes and rivers (Wood 2010).

Means of Introduction: Unknown

Status: <p> Unknown</p>

Impact of Introduction: <p> They have been known to clog water pipes (Wood 2010).</p>

Remarks: <p> This species may be cryptogenic in western states, few early surveys were conducted.&nbsp;</p>

References: (click for full references)

<p> Marsh, T., and T. S. Wood. 2002. Results of a freshwater bryozoan survey in the Pacific Northwestern United States, Pages 207-214 in Bryozoan Studies 2001, Wyse Jackson, D. P., C. J. Buttler, and M. S. Jones, eds., Balkema Publishers, Rotterdam, Netherlands.</p> <p> Neck, R. and R. Fullington. 1983. New records of the freshwater ectoproct P<span style="font-style: italic;">ectinatella magnifica</span> in eastern Texas. Texas J. Sci. 35:269-271.<br /> <br /> Pennak, R. W. 1989.&nbsp; Fresh-water Invertebrates of the United States, 3rd Ed., John Wiley and Sons, New York, 628 pp.<br /> <br /> Wood, T. S.&nbsp; Bryozoans.&nbsp; <u>Pages</u> 437-454 <em>in</em> Thorp, J. H. and A. P. Covich (eds.), 2010. Ecology and Classification of North American Freshwater Invertebrates.&nbsp; Academic Press, Inc., San Diego, CA, 1021 pp.</p>

Other Resources:
<p> <em><a href="">Pectinatella magnifica in the Connecticut River</a></em></p>

Author: Benson, A.J., and M. Cannister

Revision Date: 9/16/2013

Citation Information:
Benson, A.J., and M. Cannister, 2018, Pectinatella magnifica (Leidy, 1851): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL,, Revision Date: 9/16/2013, Access Date: 3/20/2018

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.

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Citation information: U.S. Geological Survey. [2018]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [3/20/2018].

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