A Clarification of the Genus Perna (Mytilidae)
Abstract:Many morphological features of adult mussels are variable and often of limited value in establishing taxonomic relationships. Synonymies in the Mytilidae are numerous, the genus Perna notwithstanding. The historical development and geographical distribution of the three species placed in the genus Perna are reviewed.
As a post-metamorphic character, the presence of Lateral hinge teeth which develop after metamorphosis are unique and consistent criteria for distinguishing juvenile mussels of the genus Perna. The development and fate of provincular, primary lateral, secondary lateral and dysodont hinge teeth is presented in a series of scanning electron micrographs. Distinguishing features of soft-part anatomy and adult shells are summarized. Several anatomical features are discussed with respect to a possible trend in specialization among the genera Perna, Choromytilus, Aulacomya and Mytilus.
Document Type: Research Article
Publication date: October 1, 1980
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