anaptychus definition

  • noun:
    • among a set of shelly plates present in some cephalopods, for instance the ammonites.
    • among a couple of shelly dishes present some cephalopods, because the ammonites.
    • One of the heart-shaped plates divided by a suture within some fossil cephalopods, as goniatites and ammonites.
    • certainly one of a set of shelly plates present some cephalopods, like the ammonites.
    • One of a set of shelly dishes within some cephalopods, since the ammonites.
    • among heart-shaped plates split by a suture present some fossil cephalopods, as goniatites and ammonites.
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