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Contents

   



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1 Anatomy  





2 References  














Amphiaspis






فارسی
 

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From Wikipedia, the free encyclopedia
 


Amphiaspis

Temporal range: Early Emsian

Amphiaspis argo reconstruction
Scientific classification
Kingdom:
Phylum:
Class:
Order:
Family:
Genus:
Amphiaspis
Species:
A. argo
Binomial name
Amphiaspis argo

Obruchev, 1936

Amphiaspis argo is the type species of the cyathaspidid taxon Amphiaspidida, and of the family Amphiaspididae.[1] Its fossils are restricted to early Emsian-aged marine strata of the Taimyr Peninsula, Early Devonian Siberia. A. argo, as with all other amphiaspidids, is thought to have been a benthic filter feeder that lived on top of, or buried just below the surface of the substrate of hypersaline lagoon-bottoms.

Anatomy

[edit]

So far, A. argos is known from at least one, incomplete cephalothoracic armor that is shaped vaguely like a pillow and is, from anterior to posterior, 24 centimeters long.[1] The armor has a pattern of lateral sensory line canals. There is a prominent dorsal spine on the dorsoposterior end of the cephalothoracic armor. The animal had small, possibly degenerate eyes that were flanked laterally by a small, crescent-shaped preorbital opening at the anterior end of the armor. The small eyes, in turn, laterally flank a small, slit-shaped mouth at the center of the anterior-most end of the cephalothorax.

References

[edit]
  1. ^ a b Novitskaya, Larisse. Les amphiaspides (Heterostraci) du Devonien de la Siberie. Éditions du Centre national de la recherche scientifique, 1971.


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  • Retrieved from "https://en.wikipedia.org/w/index.php?title=Amphiaspis&oldid=1095704175"

    Categories: 
    Cyathaspidiformes genera
    Amphiaspidida
    Devonian jawless fish
    Early Devonian fish
    Heterostraci genera
    Fauna of Siberia
    Fossils of Russia
    Early Devonian first appearances
    Devonian extinctions
    Devonian jawless fish stubs
    Hidden categories: 
    Articles with short description
    Short description matches Wikidata
    Articles with 'species' microformats
    All stub articles
     



    This page was last edited on 29 June 2022, at 21:29 (UTC).

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