Cyathaspididae

Cyathaspididae
Reconstruction of Cyathaspis banksii
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Infraphylum:	Agnatha
Class:	†Pteraspidomorphi
Subclass:	†Heterostraci
Order:	†Cyathaspidiformes
Clade:	†Cyathaspidida
Family:	†Cyathaspididae Romer, 1945
Type genus
†Cyathaspis Lankester
Subfamilies
Ctenaspinae Cyathaspidinae Poraspinae
Synonyms
Cyathaspidei Kiaer

Cyathaspididae is an extinct family in the heterostracan order Cyathaspidiformes.^[1][2]

Vernonaspis sp. mass mortality. Late Silurian, Cape Storm Formation, Cornwallis Island, Nunavut (Canada).

Cyathaspididae contains most of the genera originally contained within Cyathaspididae, as well as those genera contained within Irregularaspididae, and Poraspididae. In addition to the type genus, †Cyathaspis, Cyathaspididae contains the following genera: †Americaspis, †Archegonaspis, †Capitaspis, †Dikenaspis, †Dinaspidella, †Homaspidella, †Irregulareaspis, †Nahanniaspis, †Pionaspis, †Poraspis, †Ptomaspis, †Seretaspis, †Steinaspis, †Torpedaspis and †Vernonaspis.

Pionaspis amplissima cast. Early Devonian, Mackenzie Mountains, Northwest Territories (Canada).

References

1. The Classification and Evolution of the Heterostraci. L. Beverly Tarlo, Acta Palaeontologica Polonica, 1962
2. Elliott, D. K. (2013). "A new cyathaspid (Agnatha, Heterostraci) with an articulated oral cover from the Late Silurian of the Canadian Arctic". Journal of Vertebrate Paleontology. 33: 29–34. doi:10.1080/02724634.2012.717568.

External links

• Media related to Cyathaspididae at Wikimedia Commons