Comprising vertebrates that lack jaws. Agnathans are provided with sucking mouthparts with horny teeth; paired fins are absent or poorly developed. The skeleton is cartilaginous. Agnatha comprise the lampreys and hagfishes (about 63 living species).
Kingdom Animalia Superclass Agnatha
Scientific synonyms and common names
Superclass Agnatha
Common names:
Agnathans
Grassé, P. P., éd. 1958. Traité de Zoologie, Anatomie, Systématique, Biologie. 13. Agnathes et Poissons, Anatomie, éthologie, systématique, 3 fasc.: pp. 1-2758, fig. 11889, col. pl. I-V.
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