Journal article

The Polydora cornuta complex (Annelida: Polychaeta) contains populations that are reproductively isolated and genetically distinct

SA Rice, S Karl, KA Rice

Invertebrate Biology | Published : 2008

Abstract

We have collected evidence that the nominal species, Polydora cornuta Bosc 1802, contains at least three separate species in North America. Specimens of P. cornuta were collected in California, Florida, and Maine, raised in the laboratory, and assessed for reproductive compatibility, genetic similarity, gamete characteristics, and developmental rates. Reproductive crosses between each combination of sex and population revealed variable levels of hybridization at the level of fertilization. Percent fertilization was very low for all combinations (0-7%) except for California females crossed with Florida males (42%). In all interpopulation crosses, fertilized eggs arrested in cleavage and no vi..

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