Phallodrilus hallae, a new tubificid oligochaete from the St. Lawrence Great Lakes
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Abstract
The predominantly marine tubificid genus Phallodrilus is defined, a key to its nine species constructed, and an illustrated description of Phallodrilus hallae n. sp. from the St. Lawrence Great Lakes presented. The species is distinguished from other members of the genus by its well-developed atrial musculature, extensions of which ensheath the posterior prostatic ducts.Phallodrilus hallae n. sp. is a small worm which is widely distributed in the sublittoral and profundal benthos of Lake Superior; lakewide it occurred in mean densities of 50 individuals per square metre. Available records indicate a more restricted distribution in Lake Huron and Georgian Bay. We suggest that P. hallae n. sp. is either a glaciomarine relict species, or that it entered the Great Lakes system at the time of the marine transgression of the St. Lawrence valley. The apparent restriction of P. hallae n. sp. to waters of high quality suggests that it may be a sensitive oligotrophic indicator species.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Phallodrilus hallae, a new tubificid oligochaete from the St. Lawrence Great Lakes |
| Series title | Canadian Journal of Zoology |
| DOI | 10.1139/z75-108 |
| Volume | 53 |
| Issue | 7 |
| Year Published | 1975 |
| Language | English |
| Publisher | NRC Research Press |
| Contributing office(s) | Great Lakes Science Center |
| Description | 8 p. |
| First page | 934 |
| Last page | 941 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |