Rhynchelmis: Difference between revisions
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''Rhynchelmis'' is the [[genus]] of 30 species of aquatic [[oligochaete]]s from the Northern Hemisphere, with 11 species from [[North America]] and 19 from [[Eurasia]]. They are part of the family [[Lumbriculidae]], which are among the largest of the [[microdriles]]. They are generally defined as having atria in [[segment]] X and [[spermatheca]]e in [[segment]] VIII (Fend & Brinkhurst, 2000). The [[prostomium]] generally has a [[proboscis]], from which the genus has got its name. |
''Rhynchelmis'' is the [[genus]] of 30 species of aquatic [[oligochaete]]s from the Northern Hemisphere, with 11 species from [[North America]] and 19 from [[Eurasia]]. They are part of the family [[Lumbriculidae]], which are among the largest of the [[microdriles]]. They are generally defined as having atria in [[segment]] X and [[spermatheca]]e in [[segment]] VIII (Fend & Brinkhurst, 2000). The [[prostomium]] generally has a [[proboscis]], from which the genus has got its name. |
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''Rhynchelmis'' contains several subgenera, all of which have previously held genus rank: ''Rhynchelmoides'' with four species, ''Sutroa'' with six species, and ''Pseudorhynchelmis'' with nine species. Further, four species - ''[[Rhynchelmis aleutensis|Rh. aleutensis]]'', ''[[Rhynchelmis brooksi|Rh. brooksi]]'', ''[[Rhynchelmis malevici|Rh. malevici]]'' and ''[[Rhynchelmis orientalis|Rh. orientalis]]'' - cannot positively be placed in any of the subgenera. |
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==References== |
==References== |
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Revision as of 14:11, 20 September 2006
Rhynchelmis is the genus of 30 species of aquatic oligochaetes from the Northern Hemisphere, with 11 species from North America and 19 from Eurasia. They are part of the family Lumbriculidae, which are among the largest of the microdriles. They are generally defined as having atria in segment X and spermathecae in segment VIII (Fend & Brinkhurst, 2000). The prostomium generally has a proboscis, from which the genus has got its name.
Rhynchelmis contains several subgenera, all of which have previously held genus rank: Rhynchelmoides with four species, Sutroa with six species, and Pseudorhynchelmis with nine species. Further, four species - Rh. aleutensis, Rh. brooksi, Rh. malevici and Rh. orientalis - cannot positively be placed in any of the subgenera.
References
- Fend, S. V. & Brinkhurst, R. O. (2000): New species of Rhynchelmis (Clitellata, Lumbriculidae), with observations on the Nearctic species. Hydrobiologia 428: 1-59.