Traquairaspis

Traquairaspis Temporal range: Late Silurian–Early Devonian PreꞒ Ꞓ O S D C P T J K Pg N
Reconstruction of T. cambelli
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Heterostraci
Order:	Traquairaspidiformes
Family:	Traquairaspididae
Genus:	Traquairaspis Kiær 1932
Type species
Traquairaspis campbelli (Traquair 1912) Kiær 1932
Species
T. adunataDineley & Loeffler 1976 T. broadiDineley & Loeffler 1976 T. campbelli(Traquair 1912) Kiær 1932 T. guttataDineley & Loeffler 1976 T. lemniscataDineley & Loeffler 1976 T. mackenziensisDineley & Loeffler 1976 T. plana(Brotzen 1934) T. pooleiDineley & Loeffler 1976 T. pustulataDineley & Loeffler 1976 T. rambaldiBroad 1968 T. retusaDineley & Loeffler 1976
Synonyms
OrthaspisBrotzen 1934 LophaspisBrotzen 1934 non Redtenbacher 1895 LophaspiscisWhitley 1951

Traquairaspis is a genus of extinct heterostracan agnathan fish known from the Silurian and Early Devonian periods. It is predominantly known from Late Silurian fluvial deposits from Wales and England: some species were also found in shallow water marine environment in Canada and North America. ^[1]

The head-shield and body armor of most species form an almond shape. Plates have a distinctive ornamentation of tubercles: this ornamentation is very similar to the plate ornamentation of the heterostracan Weigeltaspis . This similarity of ornamentation creates much confusion over the taxonomical placement of Weigeltaspis, in addition to confusion over whether or not an isolated plate is of Traquairaspis, or of Weigeltaspis. ^[2]

The generic name honors Ramsay Heatley Traquair.

References

1. Dineley, DL (1964). "New specimens of Traquairaspis from Canada". Palaeontology. 7 (2): 210–219. "Archived copy" (PDF). Archived from the original (PDF) on 2012-04-25. Retrieved 2015-07-19.
2. Tarlo, Halstead. "LB t1965) Psammosteiformes tAgnatha)—A review with descriptions of new material from the Lower Devonian of Poland, II. Systematic Part." Palaeontologia Polonica 15: 168. Pages 20-21