期刊
JOURNAL OF SHELLFISH RESEARCH
卷 40, 期 1, 页码 63-75出版社
NATL SHELLFISHERIES ASSOC
DOI: 10.2983/035.040.0107
关键词
oyster taxonomy; molecular phylogeny; 16S ribosomal RNA; cytochrome oxidase I; Saccostrea mordax; Saccostrea mordoides; Ostreidae
资金
- National Key R&D Program of China [2019YFD0901303]
- National Science Foundation of China [41776179, 42076092]
- Strategic Priority Research Program of CAS [XDB42000000, XDA23050404]
- earmarked fund for Modern Agro-industry Technology Research System [CARS-47]
- Taishan Overseas Scholar'' project of Shandong
- U.S. NOAA CBO Non-native Oyster Research Program [NA04NMF4570424]
- USDA NIFA Hatch [NJ32920]
The taxonomy of Saccostrea oysters is complicated due to their variable shells. Molecular studies have identified a new species, Saccostrea mordoides sp. nov., distinct from S. mordax, based on both morphological and genetic analyses. This study highlights the rich species diversity of Saccostrea oysters and emphasizes the importance of molecular taxonomy.
The taxonomy of Saccostrea oysters is problematic because of their highly variable shells. Molecular studies have revealed diverse sequence lineages that do not correspond to valid species names including some Saccostrea mordax-like oysters. The S. mordax-like oysters (n = 202) were collected from southern China and classified into three lineages, A, B, and C, based on both shell morphology and mitochondrial 16S ribosomal RNA (16S) and cytochrome oxidase I (COI) sequences. Molecular and morphological analyses indicate lineages A and B are S. mordax, and lineage C is a new species Saccostrea mordoides sp. nov. The shell morphology of the new species is variable, as in other Saccostrea oysters, but distinctive in that shell height is similar to shell length with the right valve much smaller than the left valve and having undulate laminae. The average Kimura's two-parameter distance between S. mordoides sp. nov. and other Saccostrea oysters is 0.046-0.120 for 16S and 0.106-0.240 for COI, which are significantly higher than typical distances among closely related oyster species. This study shows that S. mordoides is a new species different from S. mordax, highlighting rich species diversity of Saccostrea oysters and the need for molecular taxonomy.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据