- circumnarial fold
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a skin fold around the nostrils in Chondrichthyes. Also called perinasal groove or cirumnarial groove
Dictionary of ichthyology. 2009.
circumnarial fold
Look at other dictionaries:
circumnarial groove — circumnarial fold … Dictionary of ichthyology
Bullhead sharks — Taxobox name = Bullhead sharks fossil range = Fossil range|174|0 Late Toarcian to Present [cite journal last = Sepkoski first = Jack authorlink = coauthors = title = A compendium of fossil marine animal genera (Chondrichthyes entry) journal =… … Wikipedia
