PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Pachypleurosauridae

Reptilia - Eosauropterygia - Pachypleurosauridae

Taxonomy

Pachypleuridae was named by Nopcsa (1928).

It was corrected as Pachypleurosauridae by Nopcsa (1928), Kuhn (1946), Young (1965), Kuhn (1966), Kuhn (1971), Carroll (1988), Sander (1989), Rieppel (1989), Rieppel (1993), Rieppel (1995), Rieppel and Lin (1995), Rieppel (2000), Lin et al. (2019), Xu et al. (2022) and Xu et al. (2023).

It was assigned to Nothosauroidea by Nopcsa (1928); to Nothosaurida by Kuhn (1971); to Nothosauria by Carroll (1988); to Nothosauria by Kuhn (1946), Kuhn (1966) and Sander (1989); to Pachypleurosauria by Rieppel (2000) and Lin et al. (2019); and to Pachypleurosauroidea by Young (1965), Rieppel (1989), Rieppel (1993), Rieppel (1995), Rieppel and Lin (1995), Xu et al. (2022) and Xu et al. (2023).

Subtaxa

Anarosaurus, Dactylosaurus, Doliovertebra, Hanosaurus, Honghesaurus, Luopingosaurus, Neusticosaurinae, Neusticosaurus, Pachypleurosaurinae, Pachypleurosaurus, Panzhousaurus, Psilotrachelosaurus, Serpianosaurus

Synonymy list

Year	Name and author
1928	Pachypleurosauridae Nopcsa p. 173
1946	Pachypleurosauridae Kuhn p. 59
1965	Pachypleurosauridae Young p. 354
1966	Pachypleurosauridae Kuhn p. 112
1971	Pachypleurosauridae Kuhn p. 17
1988	Pachypleurosauridae Carroll
1989	Pachypleurosauridae Rieppel p. 3
1989	Pachypleurosauridae Sander
1993	Pachypleurosauridae Rieppel p. 4
1995	Pachypleurosauridae Rieppel p. 206
1995	Pachypleurosauridae Rieppel and Lin p. 2
2000	Pachypleurosauridae Rieppel
2019	Pachypleurosauridae Lin et al. p. 3
2022	Pachypleurosauridae Xu et al. p. 3
2023	Pachypleurosauridae Xu et al. p. 3

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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	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria

Rank	Name	Author
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()
suborder	Sauropterygia
order	Eosauropterygia
superfamily	Pachypleurosauroidea
family	Pachypleurosauridae	(Nopcsa 1928)
family	Pachypleurosauridae	(Nopcsa 1928)

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.

Fm. †Pachypleurosauridae Nopcsa 1928

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G. †Anarosaurus Dames 1890

†Anarosaurus heterodontus Rieppel and Lin 1995

†Anarosaurus pumilio Dames 1890

G. †Dactylosaurus Gürich 1884

†Dactylosaurus gracilis Gürich 1884

†Dactylosaurus schroederi Nopsca 1928

G. †Doliovertebra Huene 1902

†Doliovertebra fritschi Huene 1902

G. †Hanosaurus Young 1972

†Hanosaurus hupehensis Young 1972

G. †Honghesaurus Xu et al. 2022

†Honghesaurus longicaudalis Xu et al. 2022

G. †Luopingosaurus Xu et al. 2023

†Luopingosaurus imparilis Xu et al. 2023

G. †Neusticosaurus Seeley 1882

†Neusticosaurus edwardsi Sander 1989

†Neusticosaurus edwardsii Sander 1989

†Neusticosaurus peyeri Sander 1989

†Neusticosaurus pusillus Fraas 1881

†Neusticosaurus pygmaeus Fraas 1896

†Neusticosaurus toeplitschi Nopsca 1928

G. †Pachypleurosaurus Broili 1927

†Pachypleurosaurus edwardsi Sander 1989

†Pachypleurosaurus staubi Kuhn-Schnyder 1959

G. †Panzhousaurus Jiang et al. 2018

†Panzhousaurus rotundirostris Jiang et al. 2018

G. †Psilotrachelosaurus Nopsca 1928

G. †Serpianosaurus Rieppel 1989

†Serpianosaurus germanicus Diedrich 2013

†Serpianosaurus mirigiolensis Rieppel 1989

Invalid names: Neusticosaurinae Seeley [empty], Pachypleurosaurinae Nopsca 1928 [empty]

Diagnosis

Reference	Diagnosis
W.-B. Lin et al. 2019	Small- to medium-sized eosauropterygian with relatively short snout; preorbital region of skull distinctly longer than postorbital region; lateral edge of frontal concave; upper temporal fossa smaller than orbit; trough on dorsal surface of retroarticular process present; vertebral centrum with parallel lateral edges; pachyostosis of dorsal ribs present (convergent in Lariosaurus); last dorsal rib longer than first sacral rib; posterior process on (T-shaped) interclavicles rudi- mentary or absent; dorsal iliac blade reduced to simple dorsal process; radius longer than ulna.