Tubonasus Explained

Tubonasus (meaning “tube nose”) is an extinct monospecific genus of long-snouted^[1] arthrodire placoderm from the Early Frasnian stage of the Late Devonian period, found at the Gogo Formation of Kimberley, Western Australia.

Tubonasus is interpreted as a pelagic pursuit predator, and had the ability of swallowing prey whole. Like other camuropiscids, it has an elongated rostrum, streamlined body, and narrow infragnathals.^[2]

Phylogeny

Tubonasus is a member of the family Camuropiscidae under the superfamily Incisoscutoidea, which belongs to the clade Coccosteomorphi, one of the two major clades within Eubrachythoraci.^{[3] [4]} The cladogram below shows the phylogeny of Tubonasus:^[4]

Notes and References

1. Dennis. K.. Miles. R. S.. Eubrachythoracid arthrodires with tubular rostral plates from Gogo, Western Australia. Zoological Journal of the Linnean Society. 1979. 67. 4 . 297–328. 10.1111/j.1096-3642.1979.tb01118.x.
2. The Gogo Formation Lagerstätte: A view of Australia's first great barrier reef . 10.1144/jgs2021-105 . 2022 . Trinajstic . Kate . Briggs . Derek E. G. . Long . John A. . Journal of the Geological Society . 179 . 243284735 . free .
3. You-An Zhu . Min Zhu . A redescription of Kiangyousteus yohii (Arthrodira: Eubrachythoraci) from the Middle Devonian of China, with remarks on the systematics of the Eubrachythoraci . . 169 . 4 . 798–819 . 2013 . 10.1111/zoj12089 .
4. Zhu . You-An . Zhu . Min . Wang . Jun-Qing . 1 April 2016 . Redescription of Yinostius major (Arthrodira: Heterostiidae) from the Lower Devonian of China, and the interrelationships of Brachythoraci . . 176 . 4 . 806–834 . 10.1111/zoj.12356. 0024-4082 . free .