The karyotype of Biomphalaria glabrata, the snail vector of Schistosoma mansoni.

Karyotyping was done on the mitotic metaphase chromosomes obtained from the embryos of Biomphalaria glabrata. The 18 chromosome pairs were identified and classified into 6 groups. The diploid cell has 10 pairs of metacentric, 4 pairs of submetacentric, 2 pairs of acrocentric and 2 pairs of telocentric chromosomes. The pair number 8 with secondary constriction can be used as a marker in genetic experiments.