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Opistocysta flagellum  (Leidy, 1880)
Taxonomic Serial No.: 69051

(Download Help) Opistocysta flagellum TSN 69051

 Taxonomy and Nomenclature
  Kingdom: Animalia  
  Taxonomic Rank: Species  
  Common Name(s): aquatic oligochaete worm [English]
  Valid Name: Opistocysta Cernosvitov, 1936
  Taxonomic Status:    
  Current Standing: invalid - other, see comments   
  Data Quality Indicators:    
  Record Credibility Rating: verified - minimum standards met  

  Expert: Mark J. Wetzel  
  Notes: Oligochaetologist and Curator/Collections Manager of the INHS Annelida Collection, Illinois Natural History Survey, Forbes Natural History Building, MC-652, 1816 South Oak Street, Champaign, Illinois, 61801 USA   
  Reference for: Opistocysta flagellum    
  Other Source(s):    
  Source: Classification and checklist of the freshwater oligochaetes 2013, website (version 2013)  
  Acquired: 2013   
  Notes: Wetzel, M.J., R.D. Kathman, S.V. Fend, and K.A. Coates. 2013. Classification and checklist of the freshwater oligochaetes occurring in North America north of Mexico. World Wide Web URL:   
  Reference for: Opistocysta flagellum   
  Source: NODC Taxonomic Code, database (version 8.0)  
  Acquired: 1996   
  Reference for: Opistocysta flagellum   
  Author(s)/Editor(s): Harman, Walter J.  
  Publication Date: 1970   
  Article/Chapter Title: Revision of the family Opistocystidae (Oligochaeta)   
  Journal/Book Name, Vol. No.: Transactions of the American Microscopical Society, vol. 88, no. 4   
  Page(s): 472-478   
  Publication Place:    
  Notes: Trans. Am. Micr. Soc., vol. 88, no. 4, was misdated '1969' for all papers. Actual publication date was 28 Jan 1970 (not '1969'!); 1970 should be used for all names originally published therein. See Corliss (Trans. Am. Micr. Soc., vol. 89, p. 347)   
  Reference for: Opistocysta flagellum   
  Author(s)/Editor(s): Harman, Walter J., and Michael S. Loden  
  Publication Date: 1978   
  Article/Chapter Title: A re-evaluation of the Opistocystidae (Oligochaeta) with descriptions of two new genera   
  Journal/Book Name, Vol. No.: Proceedings of the Biological Society of Washington, vol. 91, no. 2   
  Page(s): 453-462   
  Publication Place:    
  ISBN/ISSN: 0006-324X   
  Notes: Available online at   
  Reference for: Opistocysta flagellum   
  Author(s)/Editor(s): Leidy, Joseph  
  Publication Date: 1880   
  Article/Chapter Title: Notice of some aquatic worms of the family Naides   
  Journal/Book Name, Vol. No.: American Naturalist, vol. 14, no. 6   
  Page(s): 421-425   
  Publication Place:    
  Notes: Available online at   
  Reference for: Opistocysta flagellum   

 Geographic Information
  Geographic Division:    



  Comment: The taxon Opistocysta flagellum (Leidy, 1880) has long been considered a species inquirenda. Harman (1970 [1969 sic]) first made this determination because Leidy's (1880) description of this taxon was inadequate [incomplete]; searching for the type material had been unsuccessful, and collections from the type locality have not yielded specimens for study that could be attributed to this taxon as originally described. The following year (in Brinkhurst and Jamieson, 1971: 642-643), this determination was reiterated: 'Both W.J. Harman and the author [R.O. Brinkhurst] have sought the type specimens in vain, and a search of the type locality has failed to yield fresh material. In view of the diversity of characters displayed by S. American material and material from the southern states of the U.S.A., it is no longer possible to accept this as a valid species. I [Brinkhurst] agree with Harman (1970 [1969 sic]) that the best course of action is to remove this contentious name from consideration in the current nomenclature of the family'... Harman and Loden (1978) re-evaluated the family, discussing further the problems in verifying the validity of historical records published in the literature, at the same time erecting two new genera in this family, Trieminentia and Crustipellis into which the former Opistocysta tribranchiata and Opistocysta corderi, respectively, were transferred as their type species; one must read the cited papers for this account to fully understand the nomenclatural and systematic history of the genus Opistocysta, and the family Opistocystidae  



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