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A new species of wood-boring bivalve (Mollusca: Xylophagaidae) from the Eastern Arabian Sea

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Abstract

A new species of wood-boring bivalve Xylophaga nandani sp. nov. is described based on material obtained from floating woods collected with a bongo net on the eastern Arabian Sea. The new species is morphologically closest to the members of the genus Xylophaga sensu stricto (cf. “Clade 4” of Romano et al. 2020), and can be distinguished from all of them by a combination of morphological characters, such as the laterally pointed, triangular mesoplax; siphon with a simple row of large, coarse papillae placed immediately next to the furrow on the lateral incurrent siphon; and an oval concentration of numerous white cone-shaped granules with pointed, slightly curved tips on lateral siphon distal to excurrent opening. Additionally, previous records of species of the family Xylophagaidae Purchon, 1941 from the Indian Ocean and neighboring areas were discussed here. In conclusion, some of these records are doubtful, and some of these species require a taxonomic revision.

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Acknowledgements

The authors are grateful to the Head, Department of Marine Biology, Microbiology & Biochemistry, Cochin University of Science & Technology, for providing the necessary facilities to conduct this study. Special thanks to Dr. Janet R. Voight for her comments that help to improve the species description. Paul Valentich-Scott also provided useful comments and editorial assistance in the first version of this manuscript. We also thank two anonymous reviewers for their comments and suggestions that helped us significantly to improve the manuscript. The authors are grateful to the Director, Centre for Marine Living Resources and Ecology (CMLRE), Ministry of Earth Sciences, India, for their necessary help and support for participation in the Sagar Sampada Cruise No. 380. The first author is also thankful to N. Saravanane, Scientist E and Dr. Usha V. Parameswaran, Project Scientist, CMLRE, for their help and support during the sample collection. Thanks also to Mr. N.K. Vishnudattan photographed the specimens illustrated in this paper. 

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Correspondence to Marcel Velásquez.

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The authors declare no competing interests.

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All applicable international, national, and/or institutional guidelines for the care and use of animals were followed by the authors.

Sampling and field studies

All necessary permits for sampling and observational field studies have been obtained by the authors from the competent authorities of India and Chile, respectively.

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All data generated or analyzed during this study are included in this published article.

Author contribution

PRJ and MV conceived and designed the study. MJ conducted samplings. PRJ drew and imaged the specimens. MV species descriptions and led the writing with assistance from PRJ and MJ. All authors made contributions and approved the final manuscript.

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Communicated by C. Chen

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Jayachandran, P.R., Velásquez, M. & Jima, M. A new species of wood-boring bivalve (Mollusca: Xylophagaidae) from the Eastern Arabian Sea. Mar. Biodivers. 52, 7 (2022). https://doi.org/10.1007/s12526-021-01245-1

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