proterocercal
Look at other dictionaries:
protocercal — proterocercal … Dictionary of ichthyology
archicercal — proterocercal (the type of tail fin primitively symmetrical, both internally and externally, and hence one which has not undergone reduction or modification of the original form, e.g. in Petromyzontiformes) … Dictionary of ichthyology
proterocercy — condition in a proterocercal tail … Dictionary of ichthyology
