Miliolidium n. gen, a New Symbiodiniacean Genus Whose Members Associate with Soritid Foraminifera or Are Free-Living.
Amphisorus
Marginopora vertebralis
Soritinae
Symbiodiniaceae
benthic foraminifera
coral reefs
symbiosis
zooxanthellae
Journal
The Journal of eukaryotic microbiology
ISSN: 1550-7408
Titre abrégé: J Eukaryot Microbiol
Pays: United States
ID NLM: 9306405
Informations de publication
Date de publication:
09 May 2021
09 May 2021
Historique:
revised:
03
05
2021
received:
29
01
2021
accepted:
03
05
2021
pubmed:
10
5
2021
medline:
10
5
2021
entrez:
9
5
2021
Statut:
aheadofprint
Résumé
The dinoflagellate family Symbiodiniaceae comprises numerous divergent genera containing species whose ecologies range from endosymbiotic to free-living. While many associate with invertebrates including corals, sea anemones, jellyfish, giant clams, and flatworms, others occur within the cytoplasm of large protists, most notably benthic foraminifera in the sub-family Soritinae. Recent systematic revisions to the Symbiodiniaceae left out formal naming of some divergent lineages because each lacked a representative type species to erect new genus names. Here we provide genetic, morphological and ecological evidence to describe a new genus and species. Miliolidium n. gen. is closely related to the genus Durusdinium and contains several genetically divergent ecologically distinct lineages found in distant geographic locations indicating an Indo-Pacific wide distribution. One of these, Miliolidium leei n. sp., is represented by an isolate cultured from Amphisorus sp. originally collected in the Gulf of Eilat, northern Red Sea. Its peripheral chloroplast extensions are uniquely petal- or lobe-shaped, and cells possess a pyrenoid with three stalks connecting to chloroplasts, and without thylakoid intrusions. It is related to an isolate cultured from an azooxanthellate sponge from Palau and another that is commonly harbored by the soritid Marginopora vertebralis in shallow reef habitats from Guam. Research on Symbiodiniaceae diversity including free-living species in benthic habitats and those mutualistic with soritid foraminifera remains extremely limited as does our knowledge of their diversity, physiology, biogeography, and ecology.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e12856Subventions
Organisme : USA National Science Foundation
ID : IOS-1258058
Organisme : USA National Science Foundation
ID : OCE-1636022
Organisme : The Huck Institutes of the Life Sciences, Pennsylvania State University
Informations de copyright
© 2021 International Society of Protistologists.
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