|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Reptilia - Testudines
It was synonymized subjectively with Trionychia by Zittel (1890); it was reranked as the suborder Trionychoidea by Swinton (1934) and Roxo (1937).
It was assigned to Testudinata by Lydekker (1889); to Chelonia by Swinton (1934); to Thecophora by Roxo (1937); to Eucryptodira by Gaffney (1975); to Cryptodira by Joyce (2007); to Cryptodira by de Broin and de la Fuente (1993), Karl (2007), Karl et al. (2012) and Vremir (2013); and to Cryptodira by Estes (1964), Holman and Case (1988), Carroll (1988), Joyce et al. (2004), Karl et al. (2006), van Dijk et al. (2014) and Bourque et al. (2015).
|Year||Name and author|
|1889||Trionychoidea Lydekker pp. 3-4|
|1934||Trionychoidea Swinton p. 71|
|1937||Trionychoidea Roxo p. 43|
|1964||Trionychoidea Estes p. 98|
|1975||Trionychoidea Gaffney p. 428|
|1988||Trionychoidea Holman and Case p. 328|
|1993||Trionychoidea de Broin and de la Fuente p. 9|
|2004||Trionychoidea Joyce et al.|
|2006||Trionychoidea Karl et al.|
|2007||Trionychoidea Karl p. 34|
|2012||Trionychoidea Karl et al.|
|2014||Trionychoidea van Dijk et al.|
|2015||Trionychoidea Bourque et al.|
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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.