The karyotype of the Odontocete whale, Mesoplodon densirostris, has not been previously reported. The chromosome number is determined to be 2n = 42, and the karyotype is presented using G-, C-, and nucleolar organizer region (NOR) banding. The findings include NOR regions on 2 chromosomes, regions of heterochromatic variation, a large block of heterochromatin on the X chromosome, and a relatively large Y chromosome. The karyotype is compared to published karyograms of 2 other species of Mesoplodon.

中文翻译：

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Blainville 喙鲸Mesoplodon densirostris的核型

齿鲸的核型，Mesoplodon densirostris，以前没有报道过。染色体数确定为 2n = 42，核型使用 G-、C-和核仁组织区 (NOR) 条带呈现。研究结果包括 2 条染色体上的 NOR 区域、异色变异区域、X 染色体上的一大块异染色质和一条相对较大的 Y 染色体。核型与其他 2 种 Mesoplodon 的已发表核型图进行了比较。