102 urn:lsid:arphahub.com:pub:73abe0ce-d97c-5d7c-bee5-b8e6e6fe6a17 ARPHA Preprints preprints Pensoft Publishers 10.3897/arphapreprints.e64141 64141 Research Article Animalia Gastropoda Invertebrata Mollusca Molecular genetics Molecular systematics Phylogeny Taxonomy Cenozoic Oceans Molecular phylogeny suggests synonymy of Sandalia bridgesi within Sandalia triticea (Gastropoda: Ovulidae) Wu Qiong wuqiong@tio.org.cn Xing BingPeng 1 Lin Mao 2 Chen GuangCheng 1 Wang ChunGuang wangchunguang@tio.org.cn 2 Third Institute of Oceanography, Ministry of Natural Resources, PRC; Observation and Research Station of Coastal Wetland Ecosystem in Beibu Gulf, Ministry of Natural Resources , XiaMen, China Third Institute of Oceanography, Ministry of Natural Resources, PRC; Observation and Research Station of Coastal Wetland Ecosystem in Beibu Gulf, Ministry of Natural Resources XiaMen China Third Institute of Oceanography, Ministry of Natural Resources, PRC, XiaMen, China Third Institute of Oceanography, Ministry of Natural Resources, PRC XiaMen China

Corresponding authors: Qiong Wu (wuqiong@tio.org.cn), ChunGuang Wang (wangchunguang@tio.org.cn).

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2021 08 02 2021 1 A77EB189-03A5-53F7-9AA6-CB300A18CE8A 08 02 2021 08 02 2021 Qiong Wu, BingPeng Xing, Mao Lin, GuangCheng Chen, ChunGuang Wang This is an open access preprint distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

The Ovulidae are the most ecologically diverse family of the order Littorinimorpha. And the Sandalia is a small genus containing only three species. In the present study, we collected 44 specimens of Ovulidae (Gastropoda: Cypraeacea), belonging to six genera and eight species, including 20 Sandalia bridgesi and 2 Sandalia triticea individuals. The cytochrome c oxidase I gene (COI), 16S rRNA, and ITS1-5.8S-ITS2 sequences were obtained from the specimens and compared with sequences downloaded from GenBank to calculate genetic distances and construct phylogenetic trees. The sequences of S. bridgesi and S. triticea exhibited a high degree of similarity, and the S. bridgesi does not formed a separate clade, supporting the proposition that S. bridgesi should be considered a synonym of S. triticea.