Communication

10 relations: Agnatha, Alainaspis, Amphiaspidida, Animal, Chordate, Ctenaspis, Cyathaspidida, Cyathaspidiformes, Heterostraci, Pteraspidomorphi.

Agnatha

Agnatha (Greek, "no jaws") is a superclass of jawless fish in the phylum Chordata, subphylum Vertebrata, consisting of both present (cyclostomes) and extinct (conodonts and ostracoderms) species.

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Alainaspis

Alainaspis platyrhina is an extinct cyathaspidid heterostracan agnathan vertebrate which existed in a marine environment in what is now the Northwest Territories of Canada, during the upper Silurian period.

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Amphiaspidida

Amphiaspidida is a taxon of extinct cyathaspidid heterostracan agnathans whose fossils are restricted to Lower Devonian marine strata of Siberia near the Taimyr Peninsula.

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Animal

Animals are multicellular eukaryotic organisms that form the biological kingdom Animalia.

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Chordate

A chordate is an animal belonging to the phylum Chordata; chordates possess a notochord, a hollow dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail, for at least some period of their life cycle.

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Ctenaspis

Ctenaspis is an extinct genus of heterostracan cyathaspid agnathans from the early Devonian of Canada.

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Cyathaspidida

Cyathaspidida is a taxon of extinct cyathaspidiform heterostracan agnathans whose fossils are found in Silurian to Lower Devonian marine strata of Europe and North America.

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Cyathaspidiformes

Cyathaspidiformes is an extinct order of heterostracan vertebrates known from extensive fossil remains primarily from Silurian to Early Devonian strata of Europe, and North America, and from Early Devonian marine strata of Siberia.

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Heterostraci

Heterostraci ("Different scales") is an extinct subclass of pteraspidomorph jawless vertebrate that lived primarily in marine and estuary environments.

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Pteraspidomorphi

Pteraspidomorphi is an extinct class of early jawless fish.

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Redirects here:

Ctenaspididae.

References

[1] https://en.wikipedia.org/wiki/Ctenaspidae

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