Biology:Fallacosteus

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Short description: Species of extinct placoderm

Fallacosteus
Temporal range: Late Devonian: Frasnian, 382.7–372.2 Ma
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: †Placodermi
Order: †Arthrodira
Suborder: †Brachythoraci
Family: †Camuropiscidae
Genus: †Fallacosteus
Long, 1990
Species
  • Fallacosteus turneri Long, 1990

Fallacosteus is an extinct monospecific genus of arthrodire placoderm from the Early Frasnian stage of the Late Devonian period, found at the Gogo Formation of Kimberley, Western Australia. As with almost all other camuropiscids, F. turneri had an elongated snout that may have enhanced its hydrodynamic streamlining.[1][2]

Etymology

The generic name translates as "deceptive bone," in reference to its extreme similarity to Camuropiscis. The specific name turneri honors Sue Turner.[1]

Phylogeny

Fallacosteus 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 Fallacosteus:[4]

Eubrachythoraci 
 Coccosteomorphi
Coccosteoidea
Coccosteidae
 
 

Millerosteus minor

 
 

Coccosteus cuspidatus

 
 
 
 

Dickosteus threiplandi

 
 

Watsonosteus fletti

 
 

Protitanichthys rockportensis

 
 
 
Panxiosteidae
 

Plourdosteus canadensis

 
 

Panxiosteus ocullus

 
 

Janiosteus timanicus

 
 
 
Incisoscutoidea
 

Harrytoombsia elegans

 
 
 

Torosteus tuberculatus

 
 

Torosteus pulchellus

 
 
 
 

Mcnamaraspis kaprios

 
 
 

Compagopiscis croucheri

 
 

Trematosteus fontanellus

 
Camuropiscidae
 
 

Incisoscutum ritchiei

 
 

Incisoscutum sarahae

 
 
 
 

Rolfosteus canningensis

 
 
 

Tubonasus lennardensis

 
 
 

Fallacosteus turneri

 
 
 

Camuropiscis laidlawi

 
 

Latocamurus coulthardi

 
 
 
 
 
 
 
 
 
 
 

Pachyosteomorphi

 
 

References

  1. ↑ 1.0 1.1 Long, J.A. (1990). "Two new arthrodires (placoderm fishes) from the Upper Devonian Gogo Formation, Western Australia". Memoirs of the Queensland Museum 28 (1): 51-63. https://researchnow.flinders.edu.au/en/publications/two-new-arthrodires-placoderm-fishes-from-the-upper-devonian-gogo. 
  2. ↑ Long, John A. (1996). The Rise of Fishes: 500 Million Years of Evolution. The Johns Hopkins University Press. ISBN 0-8018-5438-5. 
  3. ↑ 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. 
  4. ↑ 4.0 4.1 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. 

Wikidata ☰ Q5432185 entry