Definition of Astraspidida. Meaning of Astraspidida. Synonyms of Astraspidida

Here you will find one or more explanations in English for the word Astraspidida. Also in the bottom left of the page several parts of wikipedia pages related to the word Astraspidida and, of course, Astraspidida synonyms and on the right images related to the word Astraspidida.

Definition of Astraspidida

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Meaning of Astraspidida from wikipedia

- Astraspida, or astraspids, are a small group of extinct armored jawless vertebrates, which lived in the Late Ordovician (about 450 million years ago) in...
- Protopteraspididae as sister taxa. Based on the work of Mikko Haaramo. Astraspidida Thelodonti Galeaspida Osteostraci Lepidaspis Sansom, Robert S.; Randle...