BIO 385 Invertebrate Zoology
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Invertebrate Diversity
Animal Origins

Ediacaran Period, 635-543 million years ago

(The animals illustrated here date primarily from 565-550 mya)


Ediacaran scene
Ediacaran key Key:
  1. Kimberella (Phylum Mollusca?)
  2. Tribrachidium (Phylum Trilobozoa)
  3. Dickinsonia (Phylum Proarticulata)
  4. Spriggina (Phylum Proarticulata)
  5. Parvancorina (Phylum Arthropoda?)
  6. Praecambridium (Phylum Proarticulata)
  7. Charniodiscus (Clade Vendobionta)

Charnia fossil Charnia sp. fossil replica (Clade Vendobionta)
Charniodiscus fossil Charniodiscus sp. fossil (Clade Vendobionta)
-->

Cambrian Period, 543-495 million years ago

(The animals illustrated here date primarily from 525-505 mya)


Cambrian scene
Cambrian scene key Key:
  1. Thaumaptilon (Clade Vendobionta?)
  2. Wiwaxia (Phylum Mollusca)
  3. Anomalocaris (Phylum Dinocaridida)
  4. Peytoia (Phylum Dinocaridida)
  5. Opabinia (Phylum Dinocaridida)
  6. Pikaia (Phylum Chordata)
  7. Haikouella (Phylum Chordata)
  8. Canadaspis (Phylum Arthropoda)
  9. Vauxia (Phylum Porifera)
  10. Tricrepicephalus (Phylum Arthropoda)
  11. Olenoides (Phylum Arthropoda)
  12. Naraoia (Phylum Arthropoda)
  13. Diania (Phylum Onychophora?)
  14. Sanctacaris (Phylum Arthropoda)
  15. Marrella (Phylum Arthropoda)
  16. Hallucigenia (Phylum Onychophora?)
  17. Aysheaia (Phylum Onychophora)
  18. Hyolithid (Phylum Brachiopoda)
  19. Ottoia (Phylum Priapulida)
  20. Halkieria (Phylum Mollusca)
  21. Sidneyia (Phylum Arthropoda)

Cambrian Fossils from Wheeler Formation, Western Utah

Trilobite fossil
Elrathia kingi trilobite
Agnostid Trilobite fossil
Agnostid trilobite, Ptychagnostus sp.
Gogia Fossil
Eocrinoid fossil, Gogia palmeri/juvalorum
Cambrian Algae
Cyanobacteria, Morania fragmenta and Green Algae, Yuknessia simplex? fossils

indicates extinct clade or phylum.
This page last updated 11 January 2017 by Udo M. Savalli ()
Images and text Udo M. Savalli. All rights reserved.