Ecological comparison of the three species of Gyraulus (Torquis) in North America

  • 발행 : 2001.05.01

초록

The genus Gyraulus is a large group of very small species of freshwater snails belonging to the pulmonate family Planorbidae. One of the these group the subgenus Torquis, contains some of the smaller members of the genus, and includes one of the most widespread and common of the North American freshwater snails, G. (Torquis) parvus. (omitted)

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