Biology:Amazichthys

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Short description: Extinct genus of armored fish

Amazichthys
Temporal range: Famennian
Holotype specimen AA.MEM.DS.8 (A and B), and paratype PIMUZ A/I 4773 (C, D)
Life reconstruction
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: †Placodermi
Order: †Arthrodira
Suborder: †Brachythoraci
Family: †Selenosteidae
Genus: †Amazichthys
Jobbins, 2022
Species:
†A. trinajsticae
Binomial name
†Amazichthys trinajsticae
Jobbins, 2022

Amazichthys is an extinct genus of selenosteid arthrodire from the Middle Famennian of the Late Devonian of the Anti-Atlas Mountains of Morocco. It contains a single species, Amazichthys trinajsticae. It is one of a few example of placoderm known from whole body shape, including cartilaginous axial and fin elements.[1]

Description

Amazichthys had a profile similar to that of fast-moving pelagic fishes, with lateral keels for stability, and a lunate caudal fin, suggesting it could reach and maintain high speed.[1] The holotype, AA.MEM.DS.8, is 89.7 cm (35.3 in) long.[1][2]

Etymology

Amazichthys trinajsticae was named after the North African ethnic group Amazigh (Berbers), and Australian palaeontologist Kate Trinajstic.[1]

Taxonomy

Amazichthys is part of Selenosteidae, a family inside the clade Aspinothoracidi, inside of Pachyosteomorphi, along with Dunkleosteoidea.

The cladogram shown here is based on Jobbins et al, 2022.[1]

 
 

Dicksonosteus

 
 
 

Holonema

 
 
 

Homosteus

 
 
 

Buchanosteus

 
 
 
 

Coccosteus

 
 
 

Harrytoombsia

 
 
 
 

Compagopiscis

 
 

Mcnamaraspis

 
 
 
 

Incisoscutum

 
 
 

Rolfosteus

 
 
 

Tubonasus

 
 
 

Camuropiscis

 
 

Latocamurus

 
 
 
 
 
 
 
 
Pachyosteomorphi
 

Eastmanosteus

 
 
 
 

Dunkleosteus T

 
 

Dunkleosteus R

 
 
Aspinothoracidae
 

Stenosteus

 
Selenosteidae
 
 

Gymnotrachelus

 
 
 

Gorgonichthys

 
 

Heintzichthys

 
 
 
 
 

Driscollaspis

 
 
 

Rhinosteus

 
 

Selenosteus

 
 
 

Amazichthys

 
 
 

Melanosteus

 
 
 

Draconichthys

 
 
 

Enseosteus

 
 

Walterosteus

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Jobbins, Melina; Rücklin, Martin; Ferrón, Humberto G.; Klug, Christian (2022). "A new selenosteid placoderm from the Late Devonian of the eastern Anti-Atlas (Morocco) with preserved body outline and its ecomorphology". Frontiers in Ecology and Evolution 10. doi:10.3389/fevo.2022.969158. ISSN 2296-701X. 
  2. ↑ Engelman, Russell K. (2023). "A Devonian Fish Tale: A New Method of Body Length Estimation Suggests Much Smaller Sizes for Dunkleosteus terrelli (Placodermi: Arthrodira)". Diversity 15 (3): 318. doi:10.3390/d15030318. 

Wikidata ☰ Q116172887 entry