-
Cyathaspidida is a
taxon of
extinct cyathaspidiform heterostracan agnathans whose fossils are
found in
Silurian to
Lower Devonian marine strata of Europe...
- taxa.
Until recently,
there were
several families within the
suborder Cyathaspidida,
including Cyathaspididae, Irregularaspididae, Anglaspididae, Poraspididae...
-
grouped together with
their relative Ctenaspis of Canada), and the
Cyathaspidida (i.e., Cyathaspis, Poraspis, and Anglaspis),
grouped together with their...
- Nakaolinaspis？
Cyathaspidida Amphiaspidida...
- Phylum:
Chordata class:
Pteraspida Order:
Cyathaspidiformes Suborder:
Cyathaspidida Family:
Ctenaspidae Genus:
Ctenaspis Binomial name C.
kiaeri Zych, 1931...
-
Vernonaspis is an
extinct genus of
jawless fish that
lived in the
Silurian in the
Paleozoic approximately 419
million years ago, in what is now Canada...
- Nakaolinaspis？
Cyathaspidida Amphiaspidida...
- Nakaolinaspis？
Cyathaspidida Amphiaspidida...
- Nakaolinaspis？
Cyathaspidida Amphiaspidida...
- Nakaolinaspis？
Cyathaspidida Amphiaspidida...
