Biology:Edaphaspis

From HandWiki
Short description: Extinct genus of jawless fishes


Edaphaspis bystrowi
Temporal range: Early Devonian
Scientific classification
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(unranked):
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Family:
Edaphaspididae

Novitskaya, 1968
Genus:
Edaphaspis
Species:
E. bystrowi
Binomial name
Edaphaspis bystrowi
Novitskaya, 1968

Edaphaspis bystrowi is an extinct amphiaspidid cyathaspidid heterostracan.[1] Its fossils are restricted to early Devonian-aged marine strata of the Taimyr Peninsula, Early Devonian Siberia. E. bystrowi, 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. It is the only representative of the family Edaphaspididae.

Anatomy

E. bystrowi is known from a mostly complete cephalothoracic armor that is 16 centimeters long, and 21 centimeters wide. The armor is laterally flanked on both sides by serrated fringes. The anterior portion of the armor is missing, so experts are unsure if E. bystrowi had eyes (and preorbital openings) or not. There is a pair of branchial openings placed dorsally on a large dorsal lump at the posterior end of the armor.[1]

References

  1. 1.0 1.1 Novitskaya, Larisse. Les amphiaspides (Heterostraci) du Devonien de la Siberie. Éditions du Centre national de la recherche scientifique, 1971.

Wikidata ☰ Q20686631 entry