Gallery of Tuzoia
Three species of large bivalved arthropods from the Cambrian of Utah have been assigned to the genus Tuzoia:
Below we show the figured type specimens from the KUMIP collections that have been assigned to these three species. For details on non-figured paratypes of these species, see Robison and Richards (1981).
While the fossilized carapaces of Tuzoia are known from Cambrian soft-body deposits from around the world, most of the internal features of the animal (such as the appendages) remain unknown. It is thought that Tuzoia species probably lived in the water column, perhaps explaining their great distributions.
Note: Marks on all scale bars are centimeters (cm).
Tuzoia guntheri Robison and Richards, 1981
KUMIP 134797 (Paratype; part, counterpart). Marjum Formation, House Range, Millard County, Utah. Figure 8.4 in Robison & Richards (1981).
KUMIP 134798 (Paratype). Marjum Formation, House Range, Millard County, Utah. Figure 9.2 in Robison & Richards (1981).
KUMIP 144982 (Paratype). Marjum Formation, House Range, Millard County, Utah. Figure 8.5 in Robison & Richards (1981).
KUMIP 153917 (Holotype). Marjum Formation, House Range, Millard County, Utah. Figure 7.2 in Robison & Richards (1981).
Specimen on loan; image will be added upon return to KUMIP
Tuzoia retifera Walcott, 1912
KUMIP 153918 (Part, counterpart). Spence Shale Member of the Langston Formation, Wellsville Mountains, Box Elder County, Utah. Figure 8.3 in Robison & Richards (1981).
Tuzoia? peterseni Robison and Richards, 1981
KUMIP 134799 (Holotype). Wheeler Formation, House Range, Millard County, Utah. Figure 9.1 in Robison & Richards (1981).
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