circumnarial fold
a skin fold around the nostrils in Chondrichthyes. Also called perinasal groove or cirumnarial groove

Dictionary of ichthyology. 2009.

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

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