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Temporal range: 517 Ma
Early Cambrian
Myoscolex ateles.jpg
Myoscolex ateles
Scientific classification e
Kingdom: Animalia
Stem-group: Arthropoda
Class: Dinocaridida
Order: Radiodonta
Family: Opabiniidae (?)
Genus: Myoscolex

Myoscolex is an early animal species known from the Cambrian Emu Bay Shale. Originally interpreted as an annelid, it seems to be an arthropod; the possible presence of an Opabinia-like nozzle suggests a plausible relationship with that species.[1]


  1. ^ Briggs, D. E. G.; Nedin, C. (1997). "The Taphonomy and Affinities of the Problematic Fossil Myoscolex from the Lower Cambrian Emu Bay Shale of South Australia". Journal of Paleontology 71 (1): 22–32. doi:10.2307/1306537. JSTOR 1306537.