fixosessile

English

Etymology

From fix +‎ -o- +‎ sessile.

Noun

fixosessile (plural fixosessiles)

  1. (paleontology) An organism that attaches firmly (fixes) to a surface (sessile), forming permanent, immobile colonies or individuals, like certain corals, brachiopods, or rotifers that anchor themselves to rocks or plants.
    • 1983, Seilacher, A., “Constructional morphology of bivalves: evolutionary pathways in primary versus secondary soft-bottom dwellers [twenty-fourth annual address, delivered 10 March 1983]”, in The Paleontological Association‎[1]:
      the transition of fixosessile rock dwellers back to soft substrates has resulted in fast and drastic morphological changes
    • 2023, Frank Ettensohn, “LATE ORDOVICIAN TRACE FOSSILS LEFT BY FIXOSESSILE CORAL COLONIES AT A PRE-BENTONITE DIASTEM, CENTRAL KENTUCKY, USA”, in The Geological Society of America‎[2], archived from the original on 1 December 2024:
      In central Kentucky, this bentonite occurs in the peritidal Tyrone Formation and overlies a widespread, flat, hardground/firmground surface that experienced sediment starvation for periods long enough to support colonies of the fixosessile tabulate coral, Phytopsis cellulosum.
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