Austroptyctodus
Austroptyctodus Temporal range: Late Frasnian | |
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Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | †Placodermi |
Order: | †Ptyctodontida |
Family: | †Ptyctodontidae |
Genus: | †Austroptyctodus Long, 1997 |
Species: | †A. gardineri |
Binomial name | |
†Austroptyctodus gardineri Long, 1997 | |
Synonyms | |
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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)[1] as a new 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 new genus, Austroptyctodus. This genus lacks spinal plates and has Ptyctodus-like toothplates.
The most significant discovery about Austroptyctodus is that one specimen depicts a female pregnant with 3 unborn embryos inside her, showing that like Materpiscis, also from Gogo, this genus was a live bearer that reproduced through internal fertilization.[3]
Feeding habits
Austroptyctodus fossil individuals have ostracods recovered in the abdominal region. These ostracods were related to nocturnal ones, suggesting it hunted at night.[4]
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.
- ^ Trinajstic, Kate; Briggs, Derek E. G.; Long, John A. (2022). "The Gogo Formation Lagerstätte: A view of Australia's first great barrier reef". Journal of the Geological Society. 179. doi:10.1144/jgs2021-105.
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Acanthothoraci* |
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Petalichthyida |
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Ptyctodontida |
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Rhenanida |
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Antiarchi |
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Arthrodira |
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Others |
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