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Teeth in Ichthyornis (Class: Aves)

1977; American Association for the Advancement of Science; Volume: 195; Issue: 4284 Linguagem: Inglês

10.1126/science.195.4284.1331

1095-9203

Larry D. Martin, J. D. Stewart,

Avian ecology and behavior

Both Hesperornis and Ichthyornis are toothed birds; they and Archaeopteryx share broad flattened teeth with highly expanded roots. The teeth of Ichthyornis have been reported to have been set in sockets as were those of Archaeopteryx, but new specimens of Ichthyornis show the teeth set in a groove as in Hesperornis. These new fossils are from an adult but not old bird; thus, the presence or absence of tooth sockets in birds may be dependent on age.