Austroptyctodus: Difference between revisions
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''Austroptyctodus gardineri'' is a small ptyctodontid placoderm fish from the Upper Devonian [[Gogo Formation]] of Western Australia. First described by Miles & Young (1977)<ref>Miles, R.S. & Young, G.C. 1977. Placoderm interrelationships reconsidered in the light of new ptyctodontids from Gogo Western Australia. Linn. Soc. Symp. Series 4: 123-198.</ref> as anew species of the German genus Ctenurella. Long (1997)<ref>Long, J.A. 1997. Ptyctodontid fishes from the Late Devonian Gogo Formation, Western Australia, with a revision of the German genus Ctenurella Orvig 1960. Geodiversitas 19: 515-555.</ref> redescribed the German material and found major differences in the skull roof pattern so assigned it to a ne wgenus, Austroptyctodus.This genus lacks spinal plates and has ''Ptyctodus'' type toothplates. |
''Austroptyctodus gardineri'' is a small ptyctodontid placoderm fish from the Upper Devonian [[Gogo Formation]] of Western Australia. First described by Miles & Young (1977)<ref>Miles, R.S. & Young, G.C. 1977. Placoderm interrelationships reconsidered in the light of new ptyctodontids from Gogo Western Australia. Linn. Soc. Symp. Series 4: 123-198.</ref> as anew species of the German genus Ctenurella. Long (1997)<ref>Long, J.A. 1997. Ptyctodontid fishes from the Late Devonian Gogo Formation, Western Australia, with a revision of the German genus Ctenurella Orvig 1960. Geodiversitas 19: 515-555.</ref> redescribed the German material and found major differences in the skull roof pattern so assigned it to a ne wgenus, Austroptyctodus.This genus lacks spinal plates and has ''Ptyctodus'' type toothplates. |
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The most significant discovery about Austroptyctodus is that it has one specimen of amother with 3 unborn embryos inside her, showing that like |
The most significant discovery about Austroptyctodus is that it has one specimen of amother with 3 unborn embryos inside her, showing that like ''[[Materpiscis]]'', also from Gogo, this genus was a live bearer,and reproduced by copulation<ref>Long, J.A., Trinajstic, K.,Young, G.C. & Senden, T. 2008. Live birth in the Devonian period. Nature 453: 650-653.</ref>. |
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==References== |
==References== |
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{{Reflist}} |
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Revision as of 20:11, 10 August 2010
Austroptyctodus gardineri is a small ptyctodontid placoderm fish from the Upper Devonian Gogo Formation of Western Australia. First described by Miles & Young (1977)[1] as anew species of the German genus Ctenurella. Long (1997)[2] redescribed the German material and found major differences in the skull roof pattern so assigned it to a ne wgenus, Austroptyctodus.This genus lacks spinal plates and has Ptyctodus type toothplates.
The most significant discovery about Austroptyctodus is that it has one specimen of amother with 3 unborn embryos inside her, showing that like Materpiscis, also from Gogo, this genus was a live bearer,and reproduced by copulation[3].
References
- ^ Miles, R.S. & Young, G.C. 1977. Placoderm interrelationships reconsidered in the light of new ptyctodontids from Gogo Western Australia. Linn. Soc. Symp. Series 4: 123-198.
- ^ Long, J.A. 1997. Ptyctodontid fishes from the Late Devonian Gogo Formation, Western Australia, with a revision of the German genus Ctenurella Orvig 1960. Geodiversitas 19: 515-555.
- ^ Long, J.A., Trinajstic, K.,Young, G.C. & Senden, T. 2008. Live birth in the Devonian period. Nature 453: 650-653.