期刊
JOURNAL OF PHYCOLOGY
卷 51, 期 5, 页码 850-858出版社
WILEY
DOI: 10.1111/jpy.12340
关键词
Clade B; culture; ecological guilds; free-living; species recognition; Symbiodinium; symbiosis; taxonomy
资金
- U.S. National Science Foundation [NSF DEG-0750756, NSF OCE-0926822, NSF OCE-0928764]
- Division Of Ocean Sciences
- Directorate For Geosciences [0926822] Funding Source: National Science Foundation
Molecular approaches have begun to supersede traditional morphometrics in the species delineation of micro-eukaryotes. In addition to fixed differences in DNA sequences, recent genetics-based descriptions within the dinoflagellate genus Symbiodinium have incorporated confirmatory morphological, physiological, and ecological evidence when possible. However, morphological and physiological data are difficult to collect from species that have not been cultured, while the natural ecologies of many cultured species remain unknown. Here, we rely on genetic evidence-the only data consistently available among all taxa investigated-to describe four new Clade B Symbiodinium species. The 'host-specialized' species (S. antillogorgium sp. nov. and S. endomadracis sp. nov.) engage in mutualisms with specific cnidarian hosts, but exhibit differences in our ability to culture them in vitro. The ecologically 'cryptic' species (S. aenigmaticum sp. nov. and S. pseudominutum sp. nov.) thrive in culture, but their roles or functions in the ecosystem (i.e., niches) are yet to be documented. These new species call further attention to the spectrum of ecological guilds among Symbiodinium.
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