Trilobites
Order Agnostida , Suborder Agnostina, Superfamily Agnostoidea,
Family Agnostidae, Subfamily Incertae Sedis
Geologic Age: Middle Cambrian
13 mm
Upper Fauna, Cassis or Agra Zone, Christmas Hills, Smithton, Tasmania,
Australia
Remarks: Trilobite
size varied considerably as a primary evolutionary
trend. This is the largest trilobite within order Agnostida.
Also see: Australian
Trilobites
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