Intraspecific and Ontogenetic Radular Variation in Opisthobranch Systematics (Mollusca: Gastropoda)

1 June 1976

journal article
research article
Published by Oxford University Press (OUP) in Systematic Zoology

Vol. 25 (2) , 117-122
https://doi.org/10.2307/2412737

Abstract

Bertsch, H. (Galeta Marine Laboratory, Smithsonian Tropical Research Institute, Canal Zone) 1976. Intraspecific and ontogenetic radular variation in opisthobranch systematics (Mollusca: Gastropoda). Syst. Zool. 25:117–122.—New species of opisthobranch mollusks often have been erected on numerical differences of the radular teeth. Regression analyses of radular counts of Discodoris evelinae (comprising also the synonymized species, D. hedgpethi) indicate intraspecific variation is ontogenetic. Predictions are given regarding the occurrence of this phenomenon among opisthobranchs, and suggestions are made for the use of radular characteristics in opisthobranch systematics.

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