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Reptilia - Testudines
It was reranked as the subfamily Plastomeninae by Holroyd and Hutchison (2002), Hutchison and Holroyd (2003) and Hutchison (2009); it was reranked as the unranked clade Plastomeninae by Joyce et al. (2009) and Sullivan et al. (2012); it was reranked as the unranked clade Plastomenidae by Vitek and Joyce (2015).
It was assigned to Trionychia by Hay (1902); to Trionychoidea by Hay (1908); to Trionychidae by Holroyd and Hutchison (2002), Hutchison and Holroyd (2003), Hutchison (2009), Joyce et al. (2009) and Sullivan et al. (2012); and to Pantrionychidae by Vitek and Joyce (2015).
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.