epispire

English

Noun

epispire (plural epispires)

1. (paleontology) A spiral ridge on the surface of the shell of some fossilized gastropods.
   • 1997 October, R[onald] L. Parsley, “The echinoderm classes Stylophora and Homoiostelea: non Calcichordata”, in The Paleontological Society Papers, volume 3, Cambridge, Cambridgeshire: Cambridge University Press, →DOI, →ISSN, →OCLC, page 225:

     Epispires, cothumopores, and lamellipores in cornutes are respiratory structures not atypical of early echinoderms and are only superficially similar to chordate gill slits.