family Nummulitidae

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Definition

Noun: - A family of fossil protoctists: 'Family Nummulitidae' is the scientific name for a taxonomic family comprising extinct, single-celled marine organisms known as nummulites. These organisms are characterized by their disc-shaped, calcareous shells (tests) and are important index fossils.

Usage
  • The term is used exclusively in scientific contexts, particularly in paleontology, geology, and historical biology, to classify and discuss this specific group of fossilized protists.
  • It is a proper noun and is often capitalized when referring to the formal taxonomic rank.
Examples
Advanced Usage
  • In taxonomic hierarchy, 'Family Nummulitidae' falls under the order Foraminiferida (or Foraminifera). Discussions may involve its placement within this larger group.
  • The family is significant in biostratigraphy for dating rock layers, especially from the Paleogene period.
Variants and Related Words
  • Nummulitid (noun/adjective): A member of the family Nummulitidae; pertaining to this family.
    • The quarry yielded numerous nummulitid fossils.
  • Nummulite (noun): The common name for an individual fossil or organism belonging to this family.
    • The pyramid was built using limestone containing large nummulites.
Synonyms
  • Nummulite family: An informal descriptive synonym.
  • (There are no direct common-language synonyms, as it is a precise scientific term.)
Related Phrases / Terms
  • Index fossil: A fossil used to define and identify geological periods. Nummulitidae are classic index fossils.
  • Larger foraminifera: A descriptive category that includes the family Nummulitidae due to their relatively large size compared to other foraminifera.
Noun
  1. a family of fossil protoctists

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