title: THE KARYOLOGY OF TEREDO UTRICULUS (GMELIN) (MOLLUSCA, PELECYPODA).
abstract: By counting spermatocyte and oocyte bivalents and mitotic metaphase chromosomes in cleaving eggs, we have determined both the haploid (n = 19) and the diploid numbers (2n = 38) respectively, for the species Teredo utriculus. An XY and XO sex-determining mechanism is absent in the species under study. chromosomes cannot be grouped into different classes according to length. It seems that, for Teredo utriculus, a high number of chromosomes is not necessarily accompanied by a high amount of chromosomal DNA.
authors.forename: R
authors.initials: R
authors.lastname: Vitturi
authors.forename: A
authors.initials: A
authors.lastname: Maiorca
authors.forename: E
authors.initials: E
authors.lastname: Catalano