Ecology, distribution, and taxonomy of recent ostracoda of the Laguna de Términos, Campeche, Mexico
DOI:
https://doi.org/10.22201/10.22201/igl.01855530e.1966.81.99Keywords:
euryhaline species, oyster bank, paleoecology, Acdnocythereis triangularis,, Leptocythere nikraveshaeAbstract
Thirty-nine species of recent ostracods, representing twenty-two genera, have been recognized in the Laguna de Términos, Campeche, Mexico. Five of these species are new: Acnocythereis triangularis, Leptocythere nikraveshae, Pumilocytheridea ayalai, Xestoleberis rigbyi, and Cytherura sandbergi.
Due to the great variation in water salinity, the ostracod fauna is mainly composed of euryhaline species; however, three more or less well-defined groups characterize (1) the oyster bank, (2) the lagoon, and (3) the submarine delta within the lagoon. With the available information, it is not possible to evaluate with certainty the effect that submerged vegetation and water turbidity may have on the distribution and abundance of ostracods. Nearly half of the ostracods collected in Laguna de Términos were found at stations around the contact zone between clear water with submerged vegetation and turbid water without vegetation. The most favorable environment for the development of ostracods seems to be the result of a combination of submerged plants and the nutrients carried by the rivers on the western side of the lagoon. It has been confirmed that ecological requirements vary considerably from one species to another within the same genus, and that using a single genus as an environmental indicator in paleocological studies can result in errors.
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