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Peer-reviewedCC BY 4.0PeerJ

Diversity of marine ostracods (Crustacea) from the inner Gulf of Thailand

  • Anisong Chitnarin1
  • Lalita Weerachai2
  • Marie-Béatrice Forel3
  • Chatchalerm Ketwetsuriya4
4 affiliations
  1. 1School of Geotechnology, Institute of Engineering, Suranaree University of Technology, Mueang, Nakhon Ratchasima, Thailand
  2. 2School of Biological Sciences, Area of Ecology and Biodiversity, Swire Institute of Marine Science, Institute for Climate and Carbon Neutrality, and Musketeers Foundation, Institute of Data Science, University of Hong Kong, Hong Kong, China
  3. 3Centre de Recherche en Paléontologie - Paris, Museum National d’Histoire Naturelle, Paris, France
  4. 4Department of Earth Sciences, Faculty of Science, Kasetsart University, Bang Kane, Bangkok, Thailand
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Abstract

This study examined ostracod assemblages from surface sediments collected at four major river mouths—Mae Klong, Bang Pakong, Chao Phraya, and Tha Chin—and adjacent offshore sites in the Gulf of Thailand. Forty species are identified, including one new genus, Aothai Forel, Chitnarin, Weerachai & Ketwetsuriya gen. nov., with the type species Aothai kresnae sp. nov. Ostracod distribution shows a clear spatial differentiation between river-mouth and offshore environments. River-mouth assemblages are dominated by Neocyprideis agilis (Wouters, 2005) and are characterized by low salinity (less than 30 PSU), shallow depths, and fine-grained sediments. In contrast, offshore assemblages exhibit higher species diversity and are dominated by taxa such as Keijella multisulcus Whatley & Zhao, 1988, Sinocytheridea impressa (Brady, 1869), Hemicytheridea cancellata (Brady, 1868), Stigmatocythere indica (Jain, 1977), and Neomonoceratina rhomboidea (Brady, 1868). This study provides the first comprehensive documentation of modern ostracod assemblages from the inner Gulf of Thailand and establishes a baseline for future taxonomic, ecological, and palaeoenvironmental investigations in this region.

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Cite

BibTeXRIS
BibTeX
@article{chitnarin2026diversity,
  title = {{Diversity of marine ostracods (Crustacea) from the inner Gulf of Thailand}},
  author = {Anisong Chitnarin and Lalita Weerachai and Marie-Béatrice Forel and Chatchalerm Ketwetsuriya},
  journal = {PeerJ},
  year = {2026},
  month = oct,
  doi = {10.7717/peerj.21817},
  url = {https://peerj.com/articles/21817},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Diversity of marine ostracods (Crustacea) from the inner Gulf of Thailand
AU  - Anisong Chitnarin
AU  - Lalita Weerachai
AU  - Marie-Béatrice Forel
AU  - Chatchalerm Ketwetsuriya
PY  - 2026
DA  - 2026/10/26
JO  - PeerJ
DO  - 10.7717/peerj.21817
UR  - https://peerj.com/articles/21817
AB  - This study examined ostracod assemblages from surface sediments collected at four major river mouths—Mae Klong, Bang Pakong, Chao Phraya, and Tha Chin—and adjacent offshore sites in the Gulf of Thailand. Forty species are identified, including one new genus, Aothai Forel, Chitnarin, Weerachai & Ketwetsuriya gen. nov., with the type species Aothai kresnae sp. nov. Ostracod distribution shows a clear spatial differentiation between river-mouth and offshore environments. River-mouth assemblages are dominated by Neocyprideis agilis (Wouters, 2005) and are characterized by low salinity (less than 30 PSU), shallow depths, and fine-grained sediments. In contrast, offshore assemblages exhibit higher species diversity and are dominated by taxa such as Keijella multisulcus Whatley & Zhao, 1988, Sinocytheridea impressa (Brady, 1869), Hemicytheridea cancellata (Brady, 1868), Stigmatocythere indica (Jain, 1977), and Neomonoceratina rhomboidea (Brady, 1868). This study provides the first comprehensive documentation of modern ostracod assemblages from the inner Gulf of Thailand and establishes a baseline for future taxonomic, ecological, and palaeoenvironmental investigations in this region.
SN  - 2167-8359
ER  -