''Brindabellaspis stensioi'' ("
Erik Stensiö Prof Erik Helge Osvald Stensiö HFRSE (2 October 1891 – 11 January 1984) was a Swedish paleozoologist. He later took his new surname from his place of origin and is occasionally referred to with both names (as Erik Andersson Stensiö, Erik ...
's
Brindabella Ranges
The Brindabella Range, commonly called The Brindabellas or The Brindies, is a mountain range located in Australia, on a state and territory border of New South Wales and the Australian Capital Territory (ACT). The range rises to the west o ...
Shield") is a
placoderm with a flat, platypus-like snout from the
Early Devonian
The Early Devonian is the first of three epochs comprising the Devonian period, corresponding to the Lower Devonian series. It lasted from and began with the Lochkovian Stage , which was followed by the Pragian from and then by the Emsian, ...
of the Taemas-Wee Jasper reef in
Australia
Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands. With an area of , Australia is the largest country by ...
.
Early Devonian Fish Had Platypus-Like Snout
/ref> When it was first discovered in 1980, it was originally regarded as a Weejasperaspid acanthothoracid
Acanthothoraci (''spine chests'') is an extinct group of chimaera-like placoderms who were closely related to the rhenanid placoderms. Superficially, the acanthoracids resembled scaly chimaeras, or (relatively) heavily armored ptyctodonts. ...
due to anatomical similarities with the other species found at the reef.
According to Philippe Janvier, anatomical similarities of ''B. stensiois brain and braincase with those of jawless fish, such as the Osteostraci and the Galeaspida, strongly suggest that ''B. stensioi'', and also the antiarchs, are basal placoderms closest to the ancestral placoderm.
References
* Young, Gavin C. 1980, A new Early Devonian placoderm from New South Wales, Australia, with a discussion of placoderm phylogeny: ''Palaeontographica
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*''Zeitschrift ...
'' 167A pp. 10–76. 2 pl., 27 fig.
* Janvier, Philippe. Early Vertebrates Oxford, New York: Oxford University Press, 1998.
* Long, John A. The Rise of Fishes: 500 Million Years of Evolution Baltimore: The Johns Hopkins University Press, 1996.
External links
Palaeos article on ''B. stensioi''
Placoderm genera
Early Devonian fish
Devonian placoderms
Placoderms of Australia
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