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| NAS - Nonindigenous Aquatic Species |
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Common Name: a tubificid worm
Synonyms and Other Names: Nais diaphana
Taxonomy: available through 
Identification: All dorsal chaetae are normally absent only in this genus and sometimes in the very different Ophidonais serpentina. The shape of Chaetogaster is distinctive with large mouth and pharynx and reduced prostomium. Ventral chaetae are missing from segments 3, 4 and 5. This species lacks the reflexed chaetae teeth of Chaetogaster limnaei and it lacks the developed prostomium of Chaetogaster diastrophus. The mouth is thus terminal. There are no eyes or coelomocytes. (Gustafson 1996)
Size: From 2.5 to 25 mm.
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 Alaska |
Hawaii |
Caribbean |
Interactive maps: Continental US, Alaska, Hawaii, Caribbean
Ecology: A non-swimming, carnivorous worm that can be cannibalistic. (Gustafson 1996)
Occurs in fresh to brackish water.
Means of Introduction:
Status:
Impact of Introduction:
Remarks:
References
Other Resources: Chaetogaster diaphanus, D.L. Gustafson 1996
Author: Nancy Elder
Revision Date: 1/30/2009 Citation for this information:
Nancy Elder. 2009. Chaetogaster diaphanus. USGS Nonindigenous Aquatic Species Database, Gainesville, FL.
<http://nas.er.usgs.gov/queries/FactSheet.asp?speciesID=2753> Revision Date: 1/30/2009
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