Dubious genus of arthropod
Tontoia is a dubious genus of arthropod known from the Cambrian Burgess Shale, known from a fossil proposed to be the external mould of an arthropod exoskeleton. In its original description by Charles D. Walcott it was initially suggested that "Tontoia" might be a trilobite, but it is currently considered to be a "nomen dubium," and it is unclear whether it even represents an arthropod.
References.
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