Department of Aquaculture, Taiwan National Ocean University, Keelung 20224, Taiwan.
Department of Aquaculture, Taiwan National Ocean University, Keelung 20224, Taiwan.
Tissue Cell. 2020 Dec;67:101454. doi: 10.1016/j.tice.2020.101454. Epub 2020 Oct 22.
Spermatozoan ultrastructure and complete mitochondrial genome in the marine bivalve mollusk Meretrix sp. (Taiwan) from Taiwan are described and contrasted with other bivalves, especially within Meretrix. We have examined the features of the mature gonadal spermatozoa of Meretrix sp. (Taiwan) and provided comparisons with the other four Meretrix species (M. petechialis, M. meretrix, M. lyrata, and M. lamarckii). The morphological characteristics of these spermatozoa are diagnostic for each of the species studied here. The most marked interspecific difference was found in the acrosome. Meretrix sp. (Taiwan) is genetically distinct and is a different species from M. petechialis and M. lusoria (Japan) based on complete mitochondrial genome data. Sperm data for Meretrix are limited but show remarkable congruence with the molecular results. We suggest use Meretrix formosa Gwo and Hsu as the scientific name for Taiwanese hard clams, Meretrix sp. (Taiwan). Additional species, particularly the Japanese hard clam (M. lusoria) require examination before this tentative conclusion can be verified.
本文描述并对比了台湾产贝类帘蛤目软体动物（Meretrix sp.（台湾））精子的超微结构和完整的线粒体基因组，并与其他双壳类动物，特别是 Meretrix 属内的其他物种进行了比较。我们研究了 Meretrix sp.（台湾）成熟生殖腺精子的特征，并与其他四个 Meretrix 物种（M. petechialis、M. meretrix、M. lyrata 和 M. lamarckii）进行了比较。这些精子的形态特征可用于鉴别研究的各个物种。种间最显著的差异出现在顶体。根据完整的线粒体基因组数据，Meretrix sp.（台湾）与 M. petechialis 和 M. lusoria（日本）在遗传上是不同的，是一个不同的物种。Meretrix 的精子数据有限，但与分子结果有显著的一致性。我们建议将台湾产帘蛤科贝类（Meretrix sp.（台湾））的学名采用 Gwo 和 Hsu 所提出的 Meretrix formosa。在验证这一暂定结论之前，还需要对其他物种，特别是日本蛤（M. lusoria）进行检查。
