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Phymatolithon calcareum (Pallas) W. H. Adey & D. L. McKibbin 1970

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Phymatolithon calcareum is a species of red algae in the family Hapalidiaceae. This species is extinct.

  • URI: http://eol.org/schema/terms/extinct
  • Definition: A taxon is Extinct when there is no reasonable doubt that the last individual has died. A taxon is presumed Extinct when exhaustive surveys in known and/or expected habitat, at appropriate times (diurnal, seasonal, annual), throughout its historic range have failed to record an individual. Surveys should be over a time frame appropriate to the taxon’s life cycle and life form.
  • Attribution: http://www.iucnredlist.org/technical-documents/categories-and-criteria
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EOL has data for 20 attributes, including: