dcsimg

Austrotrillina howchini is a species of forams in the family Austrotrillinidae. This species is extinct. Dead Austrotrillina howchini form calcareous oozes.

  • 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 \r\ntaxon is presumed Extinct when exhaustive surveys in known and/or expected habitat, \r\nat appropriate times (diurnal, seasonal, annual), throughout its historic range have failed \r\nto record an individual. Surveys should be over a time frame appropriate to the taxon’s \r\nlife cycle and life form.
  • Attribution: http://www.iucnredlist.org/technical-documents/categories-and-criteria
show all records
show all records
  • URI: http://purl.obolibrary.org/obo/ENVO_02000046
  • Definition: Calcareous ooze is a marine sediment composed primarily of the shells--also known as tests--of foraminifera, coccolithophores, and pteropods. This is the most common pelagic sediment by area, covering 48% of the world ocean's floor. This type of ooze is limited to depths above the Carbonate Compensation Depth at time of burial. It accumulates more rapidly than any other pelagic sediment type, with a rate that varies from 0.3 - 5 cm / 1000 yr.
show all records

EOL has data for 6 attributes, including:

Known occurrences, collected specimens and observations of Austrotrillina howchini (Schlumberger 1893). View this species on GBIF