- Protaspididae
Taxobox
name = Protaspididae
fossil_range =Silurian -Devonian
|regnum =Animal ia
phylum =Chordata
classis =Heterostraci
ordo =Pteraspidiformes
familia = ProtaspididaeThe Protaspididae are an extinct marine family of fish-like
vertebrates . The protaspidids existed in the earlyDevonian period, representing a transitional form between thePteraspididae and thePsammosteida , bearing the broad head shield shape of the latter, due to a morebenthic (bottom-dwelling) existence.References
# [http://www.palaeos.com/Vertebrates/Units/040Pteraspidomorphi/040.600.html Palaeos Vertebrates entry on order Pteraspidiformes]
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