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Taxonomy
Hymenocaris parva was named by Walcott (1912). It is not extant.
It was recombined as Tuzoia parva by Briggs (1977), Lieberman (2003), Vannier et al. (2007).
It was recombined as Tuzoia parva by Briggs (1977), Lieberman (2003), Vannier et al. (2007).
Sister species lacking formal opinion data