| Named By: | Long in 1997 |
| Time Period: | Late Frasnian |
| Location: | Australia - Gogo Formation |
| Size: | Unavailable |
| Diet: | Carnivore |
| Fossil(s): | Partial remains, though one specimen has three unborn embryos preserved within it |
| Classification: | | Chordata | Gnathostomata | Placodermi | Ptyctodontida | Ptyctodontidae | |
| Also known as: | | Ctenurella gardineri | |
Austroptyctodus gardineri is a small ptyctodontid placoderm fish from the Upper Devonian Gogo Formation of Western Australia. First described by Miles & Young (1977) as a new species of the German genus Ctenurella. Long (1997) 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.