Austroptyctodus

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

  1. ^ 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.
  2. ^ 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.
  3. ^ Long, J.A., Trinajstic, K.,Young, G.C. & Senden, T. 2008. Live birth in the Devonian period. Nature 453: 650-653.