The Chromosomes ofDendrodoris LimbataandDendrodoris Grandiflora(Gastropoda, Mollusca)

Abstract
Counting spermatocyte bivalents, we have determined the haploid number n = 13 for Dendrodoris limbata and Dendrodoris grandiflora. The orders Nudibranchia and Notaspidea, possessing haploid values of 13 and 12 chromosomes respectively, seem to be more evolved than the other orders of the sub-class Opisthobranchia.

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