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The karyotype of the brown mussel Perna perna (L.) (Bivalvia: Mytilidae)

Claudia M. Jacobi^I; Carla Rosenberg^II; Angela M. Vianna-Morgante^II

^IDepartamento de Zoologia, and ^IIDepartamentode Biologia, Instituto de Biociências-USP, Caixa Postal 11461, 05499 São Paulo, SP, Brasil. Send correspondence to C.M.J.

ABSTRACT

The karyotype of the edible brown mussel Perna perna (L.) is described. Mitotic metaphases were obtained from 16 to 20-hour-old embryos. The diploid number was confirmed to be 28, with chromosomes varying from metacentric to acrocentric. Preliminary C-band studies revealed the presence of intercalary and terminal blocks besides centromeric heterochromatin.

Keywords: karyotype; Perna perna.

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