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Temporal range:
Middle Cambrian, 508 Ma
Walcott Cambrian Geology and Paleontology II plate 13 Mackenzia costalis.jpg
Mackenzia costalis
Scientific classification edit
Kingdom: Animalia
Phylum: Cnidaria
Class: Anthozoa
Order: Actiniaria
Family: Mackenziidae
Genus: Mackenzia
Walcott, 1911
M. costalis
Binomial name
Mackenzia costalis
Walcott, 1911

Mackenzia is an elongated bag-like animal known from the Middle Cambrian Burgess Shale. It attached directly to hard surfaces, such as brachiopod shells. 14 specimens of Mackenzia are known from the Greater Phyllopod bed, where they comprise <0.1% of the community.[1] Mackenzia was originally described by Charles Walcott in 1911 as a holothurian echinoderm.[2] Later, Mackenzia is thought to be a cnidarian and appears most similar to modern sea anemones.[3]

External links[edit]

  • "Mackenzia costalis". Burgess Shale Fossil Gallery. Virtual Museum of Canada. 2011.


  1. ^ Caron, Jean-Bernard; Jackson, Donald A. (October 2006). "Taphonomy of the Greater Phyllopod Bed community, Burgess Shale". PALAIOS. 21 (5): 451–65. doi:10.2110/palo.2003.P05-070R. JSTOR 20173022.
  2. ^ Durham, J. W. (1974). "Systematic Position of Eldonia ludwigi Walcott". Journal of Paleontology. 48 (4): 750–755. JSTOR 1303225.
  3. ^ Conway Morris, S. (1993). "Ediacaran-like fossils in Cambrian Burgess Shale–type faunas of North America". Palaeontology. 36 (31–0239): 593–635.