Neusticosaurus

Neusticosaurus; Temporal range: Middle Triassic,
	Neusticosaurus pusillus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Superorder:	†Sauropterygia
Family:	†Pachypleurosauridae
Genus:	†Neusticosaurus; Seeley, 1882
Species
	†N. edwardsii (Cornalia, 1854 [originally Pachypleura])[1]; †N. peyeri Sander, 1989; †N. pusillus (Fraas, 1881 [originally Simosaurus]) (type); †N. toeplitschi (Nopcsa, 1928 [originally Psilotrachelosaurus]);
Synonyms
	Genus synonymy Pachypleura ; Cornalia, 1854 ; Pachypleurosaurus ; Broili, 1927 (nomen dubium) ; Psilotrachelosaurus ; Nopcsa, 1928 ; Species synonymy Neusticosaurus pygmaeus ; Fraas, 1896 ; Pachypleura edwardsii ; Cornalia, 1854 ; Pachypleurosaurus staubi ; Kuhn-Schnyder, 1959 (nomen dubium; junior synonym of N. pusillus)[2] ; Psilotrachelosaurus toeplitschi ; Nopcsa, 1928 ; Simosaurus pusillus ; Fraas, 1881 ;

Neusticosaurus (sometimes misspelled Neuticosaurus) ("swimming lizard"), is an extinct genus of marine reptile belonging to the pachypleurosaurs, from Italy, Switzerland and Germany. Neusticosaurus was one of the smallest nothosaurs and probably fed on small fish.

*Neusticosaurus* dimensions[3][4]
Species	Length	Mass
N. edwardsii	120–125 cm (3.94–4.10 ft)	5.5 kg (12 lb)
N. peyeri	45–55 cm (1.48–1.80 ft)	0.35 kg (0.77 lb)
N. pusillus	40–52 cm (1.31–1.71 ft)	0.35 kg (0.77 lb)
N. toeplitschi	30–40 cm (0.98–1.31 ft)	0.18 kg (0.40 lb)

Several Neusticosaurus pusillus at the Museum für Naturkunde, Berlin

Neusticosaurus edwardsii

References

Cornalia, E. (1854). "Notizie zoologiche sul Pachypleura edwardsii Cor. Nuovo sauro acrodonte degli strati triasici di Lombardia". Giornale dell'istituto Lombardo di Scienze. 6: 1–46.
Klein, Nicole; Furrer, Heinz; Ehrbar, Iris; Torres Ladeira, Marta; Richter, Henning; Scheyer, Torsten M. (13 July 2022). "A new pachypleurosaur from the Early Ladinian Prosanto Formation in the Eastern Alps of Switzerland". Swiss Journal of Palaeontology. 141 (1): 12. doi:10.1186/s13358-022-00254-2. ISSN 1664-2384. PMC 9276568. PMID 35844249.
Wachtler, M. (2018). "The marine reptile Neusticosaurus from the Eastern Alps". In Watchler, M.; Perner, T. (eds.). Some new and exciting Triassic Archosauria from the Dolomites (Northern Italy). DoloMythos. p. 53. ISBN 978-88-908815-0-3.
Paul, Gregory S. (2022). The Princeton Field Guide to Mesozoic Sea Reptiles. Princeton University Press. pp. 84–85. doi:10.1515/9780691241456. ISBN 9780691193809. S2CID 251553177.

Seeley, H.G. (1882). On Neusticosaurus pusillus (Fraas), an amphibious reptile having affinities with the terrestrial Nothosauria and with the marine Plesiosauria. Quarterly Journal of the Geological Society of London 38:350–366.

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[1] Cornalia, E. (1854). "Notizie zoologiche sul Pachypleura edwardsii Cor. Nuovo sauro acrodonte degli strati triasici di Lombardia". Giornale dell'istituto Lombardo di Scienze. 6: 1–46.

[2] Klein, Nicole; Furrer, Heinz; Ehrbar, Iris; Torres Ladeira, Marta; Richter, Henning; Scheyer, Torsten M. (13 July 2022). "A new pachypleurosaur from the Early Ladinian Prosanto Formation in the Eastern Alps of Switzerland". Swiss Journal of Palaeontology. 141 (1): 12. doi:10.1186/s13358-022-00254-2. ISSN 1664-2384. PMC 9276568. PMID 35844249.

[3] Wachtler, M. (2018). "The marine reptile Neusticosaurus from the Eastern Alps". In Watchler, M.; Perner, T. (eds.). Some new and exciting Triassic Archosauria from the Dolomites (Northern Italy). DoloMythos. p. 53. ISBN 978-88-908815-0-3.

[4] Paul, Gregory S. (2022). The Princeton Field Guide to Mesozoic Sea Reptiles. Princeton University Press. pp. 84–85. doi:10.1515/9780691241456. ISBN 9780691193809. S2CID 251553177.