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Updated: Jul 19, 2026

A Whole Mount In Situ Hybridization Method for the Gastropod Mollusc Lymnaea stagnalis
Published on: March 15, 2016
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.
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