The Chromosome Complement of Cercyra hastata (Turbellaria: Tricladida) from the Adriatic Sea

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Abstract
A karyometric analysis of the diploid complement of C. hastata (Tricladida: Maricola) was carried out, mainly on mitoses from the male germ cell line. C. hastata has 7 pairs of homologous chromosomes. The chromosomes can be distinguished on the basis of their lengths; i.e., 1 pair of very large chromosomes, 1 of medium length and 5 pairs of small chromosomes. With reference to centromere position: chromosomes 1, 4 and 5 are submetacentric; chromosomes 3, 6 and 7 are subtelocentric; and chromosome 2 is acrocentric.