Name: Griphognathus ‭(‬hook jaw‭)‬.
Phonetic: Grif-o-nay-fus.
Classification: Chordata,‭ ‬Sarcopterygii,‭ ‬Dipnoi,‭ ‬Dipteriformes.
Species: G. minutidens, G. sculpta, G. whitei‭
Diet: Carnivore/Piscivore.
Size: About‭ ‬60‭ ‬centimetres long.
Known locations: Australia and Germany.
Time period: Late Devonian.
Fossil representation: Few specimens.

       Griphognathus was an early lungfish,‭ ‬an identification which means that members of the genus may have been able to survive for short periods out of the water.‭ ‬The body is long with most of the fins being situated towards the rear,‭ ‬the pectoral fins being the obvious exception to this.‭ ‬The upper lobe of the tail is much more developed than the lower,‭ ‬suggesting that Griphognathus may have spent a lot of time near the bottom since the reduced lower lobe would then‭ ‬not be rubbing against hard obstacles.‭ ‬The name of‭ ‬the genus s derived from the hook-like shape of the jaws.

More information on the above fish can be found on their corresponding pages; Ceratodus, Chinlea, Dipnorhynchus, Dipterus, Eusthenopteron, Gooloogongia, Griphognathus, Gyroptychius, Holoptychius, Hyneria, Macropoma, Mandageria, Osteolepis, Panderichthys, Rhizodus, Strunius, Tiktaalik (upper estimate).

Further reading
- Dipnoan (lungfish) skulls and the relationships of the group: a study based on new species from the Devonian of Australia. - Zoological Journal of the Linnean Society 61:1-328. - R. S. Miles - 1977.


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