Jarl K. Hiltunen
David G. Cook
1975
<p><span>The predominantly marine tubificid genus </span><i>Phallodrilus</i><span> is defined, a key to its nine species constructed, and an illustrated description of </span><strong><i>Phallodrilus hallae</i></strong><span> 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.</span><i>Phallodrilus hallae</i><span> 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 </span><i>P</i><span>. </span><i>hallae</i><span> 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 </span><i>P</i><span>. </span><i>hallae</i><span> n. sp. to waters of high quality suggests that it may be a sensitive oligotrophic indicator species.</span></p>
application/pdf
10.1139/z75-108
en
NRC Research Press
Phallodrilus hallae, a new tubificid oligochaete from the St. Lawrence Great Lakes
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