-
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...
-
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...
-
Animalia Phylum:
Chordata class:
Pteraspidomorphi Subclass:
Heterostraci Order:
Cyathaspidiformes Suborder:
Cyathaspidida Family:
Ariaspidae Genus: Ariaspis...
- Nakaolinaspis？
Cyathaspidida Amphiaspidida...
-
Cyathaspis is the type
genus of the
heterostracan order Cyathaspidiformes.
Fossils are
found in late
Silurian strata in the
Cunningham Cr**** Formation...
- of
extinct cyathaspidiform heterostracan agnathans in the
suborder Cyathaspidida. If
Amphiaspidida can be
ignored as a daughter-taxon, the
family Ctenaspidae...
