Compagopiscis

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Compagopiscis
Temporal range: Late Devonian: Frasnian, 382.7–372.2  Ma
Compagopiscis croucheri.png
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class:† Placodermi
Order:† Arthrodira
Suborder:† Brachythoraci
Clade:† Eubrachythoraci
Clade:† Coccosteomorphi
Superfamily:† Incisoscutoidea
Genus:† Compagopiscis
Gardiner & Miles, 1994
Species
  • Compagopiscis croucheriGardiner & Miles, 1994 (type)

Compagopiscis is an extinct genus of placoderm known from the Gogo Formation. It lived in the Upper Devonian (Frasnian stage) of Western Australia. [1] The genus is monotypic, with its only species being Compagopiscis croucheri. [2]

Contents

Description

Compagopiscis is one of the earliest known vertebrates to have teeth. [3] An analysis of its bite force suggests that it was a generalist predator, having a diverse diet. [4] Fossils have been found in numbers, suggesting possible schooling behavior. [4]

Phylogeny

Compagopiscis was originally classified as a member of the family Plourdosteidae. [5] However, phylogenetic analysis later found Plourdosteidae to be an invalid grouping, and the family was dismissed. [6] Torosteus is now considered to be a member of the superfamily Incisoscutoidea, which belongs to the clade Coccosteomorphi, one of the two major clades within Eubrachythoraci. The cladogram below shows the phylogeny of Compagopiscis: [7]

Eubrachythoraci

References

  1. ↑ Donoghue, Philip C. J.; Rücklin, Martin (2014-09-15). "The ins and outs of the evolutionary origin of teeth". Evolution & Development. 18 (1): 19–30. doi: 10.1111/ede.12099 . ISSN   1520-541X. PMID   25219878.
  2. ↑ Trinajstic, Kate (1995-01-01). "The role of heterochrony in theevolution of eubrachythoracid arthrodires with special reference to Compagopiscis croucheri and Incisoscutum ritchei from the Late Devonian Gogo Formation, Western Australia" . Geobios. Premiers Vertandébrandés et Vertandébrandés Infandérieurs. 28: 125–128. doi:10.1016/S0016-6995(95)80099-9. ISSN   0016-6995.
  3. ↑ Rücklin, Martin; Donoghue, Philip C. J.; Johanson, Zerina; Trinajstic, Kate; Marone, Federica; Stampanoni, Marco (2012). "Development of teeth and jaws in the earliest jawed vertebrates" . Nature. 491 (7426): 748–751. doi:10.1038/nature11555. ISSN   1476-4687. PMID   23075852. S2CID   4302415.
  4. 1 2 Trinajstic, Kate; Briggs, Derek E. G.; Long, John A. (23 November 2021). "The Gogo Formation Lagerstätte: a view of Australia's first great barrier reef". Journal of the Geological Society . 179 (1). doi: 10.1144/jgs2021-105 . ISSN   0016-7649.
  5. ↑ Carr, R.K.; Hlavin, W.J. (2010). "Two new species of Dunkleosteus Lehman, 1956, from the Ohio Shale Formation (USA, Famennian) and the Kettle Point Formation (Canada, Upper Devonian), and a cladistic analysis of the Eubrachythoraci (Placodermi, Arthrodira)". Zoological Journal of the Linnean Society . 159 (1): 195–222. doi: 10.1111/j.1096-3642.2009.00578.x .
  6. ↑ You-An Zhu; Min Zhu (2013). "A redescription of Kiangyousteus yohii (Arthrodira: Eubrachythoraci) from the Middle Devonian of China, with remarks on the systematics of the Eubrachythoraci". Zoological Journal of the Linnean Society . 169 (4): 798–819. doi:10.1111/zoj12089.
  7. ↑ 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". Zoological Journal of the Linnean Society . 176 (4): 806–834. doi: 10.1111/zoj.12356 . ISSN   0024-4082.
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