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Contributions to the study of the comparative morphology of teeth and other relevant ichthyodorulites in living supraspecific taxa of chondrichthyan fishes part a selachii 3. order squaliformes families echinorhinidae oxynotidae and squalidae



Contributions to the study of the comparative morphology of teeth and other relevant ichthyodorulites in living supraspecific taxa of chondrichthyan fishes part a selachii 3. order squaliformes families echinorhinidae oxynotidae and squalidae



Bulletin de l'Institut Royal des Sciences Naturelles de Belgique Biologie 59: 101-158



The teeth of nearly all supraspecific taxa of squaliformes are described and illustrated by SEM photos. The tooth morphology allows a direct assignment to all these taxa and some proposals of taxonomic adjustments. The results support opinions of other authors, that Echinorhinidae represent a separate order, Oxynotidae coincide odontologically with Squalidae; Squalid genera could be grouped into 8 subfamilies, 4 of which could not be defined hitherto; Centroselachus GARMAN, 1913 is confirmed and should be revalidated; significant odontological differences do not exist between Cirrhigaleus and Squalus, Lepidorhinus and Centrophorus, Scymnodon and Scymnodalatias, neither between Squaliolus and Heteroscymnoides and Euprotomicrus on the other hand; 2 subgenera appear to be justified for the 3 species of Somniosus; Somniosus (Somniosus) and Somnisus (Rhinoscymnus). An odontological key is given for all these supraspecific taxa.

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