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Taxonomy
Chionista was named by Keen (1958) [Sepkoski's age data: Q Plei R]. It is extant.
It was reranked as Chione (Chionista) by Coan et al. (2000), Roopnarine (2001).
It was assigned to Veneridae by Todd (2001); to Chione by Coan et al. (2000), Roopnarine (2001); to Veneroida by Sepkoski (2002); and to Venerinae by Coan and Valentich-Scott (2012).
It was reranked as Chione (Chionista) by Coan et al. (2000), Roopnarine (2001).
It was assigned to Veneridae by Todd (2001); to Chione by Coan et al. (2000), Roopnarine (2001); to Veneroida by Sepkoski (2002); and to Venerinae by Coan and Valentich-Scott (2012).