Studies on the Chromosomes of Four Species in the Genus Septifer (Bivalvia, Mytilidae)

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  • クジャクガイ属 4 種の染色体
  • クジャクガイ属4種の染色体〔英文〕
  • クジャクガイゾク 4シュ ノ センショクタイ エイブン

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Abstract

Karyotypes in four species of Septifer have been studied. In both Septifer (Septifer) bilocularis and S. (S.) excisus, a chromosome number of 26 (2n) was counted, and karyotypes of both consisted of 5 pairs of meta- or submetacentrics and 8 pairs of subtelo- or telocentrics. In both Septifer (Mytilisepta) virgatus and S. (M.) keenae, chromosome numbers of 28 (2n) and 14 (n) were counted, and the karyotypes each consisted of 7 pairs of meta- or submetacentrics and 7 pairs of subtelo- or telocentrics.

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