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Temporal range: Cambrian Stage 3–Mid Cambrian
Carapace of Tuzoia
Tuzoia polleni.jpg
Museum specimen of T. polleni
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Thylacocephala
Family: incertae sedis
Genus: Tuzoia
Walcott, 1912

Tuzoia is an extinct genus of large bivalved arthropod known from Early to Middle Cambrian marine environments in what is now the Burgess Shale (British Columbia), Emu Bay Shale (Australia), Kaili (Guizhou, China), the Rockslide Formation (Northwest Territories, Canada), the Spence Shale, Wheeler Formation, and Marjum Formation (Utah), and the Kinzers Formation (Pennsylvania). This arthropod reached lengths of 180 mm long. There are currently 7 valid species recognized.[1][2]

Showing marginal spines

External links[edit]


  1. ^ Vannier, J.; Caron, J.-B.; Yuan, J.-L.; Briggs, D. E. G.; Collins, D.; Zhao, Y.-L.; Zhu, M.-Y. (2007). "Tuzoia: morphology and lifestyle of a large bivalved arthropod of the Cambrian seas". Journal of Paleontology. 81 (3): 445–471. doi:10.1666/pleo05070.1. 
  2. ^ Julien Kimmig & Brian R. Pratt (2015). "Soft-bodied biota from the middle Cambrian (Drumian) Rockslide Formation,Mackenzie Mountains, northwestern Canada". Journal of Paleontology. 89 (1): 51–71. doi:10.1017/jpa.2014.5.