PBDB Taxon

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Helochelydridae

Reptilia

Taxonomy

Helochelydrinae was named by Nopcsa (1928).

It was reranked as the unranked clade Helochelydridae by Joyce (2017), Gentry and Ebersole (2021) and Joyce (2022).

It was assigned to Pleurosternidae by Nopcsa (1928); to Dermatemydidae by Kuhn (1966); to Perichelydia by Joyce (2017); and to Testudinata by Gentry and Ebersole (2021) and Joyce (2022).

Subtaxa

Aragochersis, Helochelydra, Helochelys, Naomichelys, Plastremys, Solemydinae, Trachydermochelys, Tretosternon

Synonyms

Solemydidae was named by Lapparent de Broin and Murelaga (1996). It was considered monophyletic by Pérez-García et al. (2012).

It was synonymized objectively with Helochelydridae by Joyce (2017).

It was assigned to Cryptodira by Pereda-Suberbiola et al. (2000); to Pleurosternoidea by Milner (2004); to Pancryptodira by Pérez-García et al. (2012); and to Testudinata by Joyce et al. (2014).

Synonymy list

Year	Name and author
1928	Helochelydrinae Nopcsa p. 165
1966	Helochelydrinae Kuhn p. 25
1996	Solemydidae Lapparent de Broin and Murelaga
2000	Solemydidae Pereda-Suberbiola et al.
2004	Solemydidae Milner pp. 1452-1453
2012	Solemydidae Pérez-García et al.
2014	Solemydidae Joyce et al.
2017	Helochelydridae Joyce
2021	Helochelydridae Gentry and Ebersole
2022	Helochelydridae Joyce

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()

Rank	Name	Author
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
—	Testudinata	(Oppel 1811)
—	Helochelydridae	()
—	Helochelydridae	()

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.

Unr. †Helochelydridae Nopcsa 1928

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G. †Aragochersis Perez-Garcia et al. 2019

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†Aragochersis lignitesta Perez-Garcia et al. 2019

G. †Helochelydra Nopcsa 1928

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†Helochelydra anglica Lydekker 1889

†Helochelydra bakewelli Mantell 1833

†Helochelydra nopcsai Lapparent de Broin and Murelaga 1999

G. †Helochelys von Meyer 1854

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†Helochelys danubina von Meyer 1854

G. †Naomichelys Hay 1908

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†Naomichelys speciosa Hay 1908

G. †Plastremys Owen 1881

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†Plastremys lata Owen 1881

†Plastremys rutteri Andrews 1920

Subfm. †Solemydinae Tong et al. 2023

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G. †Solemys Lapparent de Broin and Murelaga 1996

†Solemys gaudryi Matheron 1869

†Solemys vermiculata Lapparent de Broin and Murelaga 1996

G. †Trachydermochelys Seeley 1869

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†Trachydermochelys phlyctaenus Seeley 1869

G. †Tretosternon Owen 1842

Invalid names: Solemydidae Lapparent de Broin and Murelaga 1996 [objective synonym]

Diagnosis

No diagnoses are available