ammonites
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Arandaspis Ritchie and Gilbert-Tomlinson 1977 (jawless fish)

Triploblastica - Chordata

Full reference: A. Ritchie and J. Gilbert-Tomlinson. 1977. First Ordovician vertebrates from the Southern Hemisphere. Alcheringa 1:351-368

Parent taxon: Arandaspididae according to G. C. Young 2009

Sister taxa: none

Subtaxa: none

Type: Arandaspis prionotolepis

Ecology: