Girish Mahajan (Editor)

Acaste (trilobite)

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Kingdom
  
Animalia

Class
  
Trilobita

Order
  
Phacopida

Rank
  
Genus

Phylum
  
Arthropoda

Superorder
  
Phacopina

Superfamily
  
Acastoidea

Acaste (trilobite) httpsuploadwikimediaorgwikipediacommonsthu

Similar
  
Acastoides, Balizoma, Cnemidopyge, Lloydolithus, Gravicalymene

Acaste is a genus of extinct trilobite of the order Phacopida which lived throughout the Silurian period. They are characterized by a convex dorsal surface, an absence of spines, a shortening of the head-shield and a general rounding off of all angles. Species include Acaste downingiae (Wenlock Series).

Contents

Etymology

  • A. lokii is named after Loki, the Norse god of mischief. Loki tricked the blind god Höðr to kill the god of beauty Baldr, and so started the demise of the world (or Ragnarök). This epithet was chosen by Edgecombe because it is based on the cephalon of A. longisulcata, which has turned out to be a mixed collection. The pygidium of A. longisulcata belongs to a Phacopoidea.
  • A. zerinae is named in honor of Zerina Edgecombe, the wife of the species author.

    • Species previously assigned to Acaste

    Some species originally designated to Acaste have now been reassigned to other genera.

  • A. birminghamensis = Llandovacaste birminghamensis
  • A. constrictus = Acastoides constricta
  • A. cordobesa = Pennaia verneuili
  • A. henni = Acastoides henni
  • A. verneuili = Calmonia terrarocenai

    • References

    Acaste (trilobite) Wikipedia
    (Text) CC BY-SA