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The Structure of the IMaso‐hypophysial Complex and the Mouth in Fossil and Extant Cyclostomes, with Remarks on Amphiaspiforms
Author(s) -
Janvier Philippe
Publication year - 1974
Publication title -
zoologica scripta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.204
H-Index - 64
eISSN - 1463-6409
pISSN - 0300-3256
DOI - 10.1111/j.1463-6409.1974.tb00816.x
Subject(s) - biology , extant taxon , sinus (botany) , evolutionary biology , interpretation (philosophy) , anatomy , zoology , paleontology , genus , computer science , programming language
The relationships between myxinoids and heterostracans are discussed on the basis of new observations on the structure of the prenasal sinus in an embryo of Myxine . A new interpretation of the feeding mechanism of heterostracans is proposed. Some remarks are made on the transformation of the prenasal sinus in more primitive heterostracans into a secondarily subdivided one in the amphiaspiforms.