// Workers AI · dad joke modeWhy did Cetiosauridae go to the party? Because it was a whale of a time.

Cetiosauridae; Temporal range: Late Toarcian—Callovian, 178–161 Ma PreꞒ Ꞓ O S D C P T J K Pg N H Sin. Plie. Toar. A B B C Ox. Ki. Ti.
	Restoration of Cetiosaurus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Dinosauria
Clade:	Saurischia
Clade:	†Sauropodomorpha
Clade:	†Sauropoda
Clade:	†Eusauropoda
Family:	†Cetiosauridae; Lydekker, 1888
Subgroups
	†Cetiosaurus; †Chebsaurus?; †Ferganasaurus?; †Lapparentosaurus?; †Patagosaurus; †Perijasaurus?; †"Rutellum"?; †Mamenchisaurinae?;

Cetiosauridae is a family of sauropod dinosaurs which was first proposed by Richard Lydekker in 1888.^[2] While traditionally a wastebasket taxon containing various unrelated species, some recent studies have found that it may represent a natural clade.^[1] Alongside Cetiosaurus from the Middle Jurassic of Britain, other taxa recently assigned to the family include Lapparentosaurus from the Middle Jurassic of Madagascar,^[3] and Patagosaurus from the late Early-Middle Jurassic of Patagonia,^[4] which share autapomorphies with Cetiosaurus that are not shared by other eusauropods. Additionally, at least one study has suggested that the mamenchisaurids may represent a sub-group of the cetiosaurids, which would be termed Mamenchisaurinae.^[1]

Cladogram of Sauropoda after Holwerda et al 2021, showing the position of Cetiosauridae:^[4]

Sauropoda

	Vulcanodon

	Tazoudasaurus

Barapasaurus

	Spinophorosaurus

	Volkheimeria

Eusauropoda

Shunosaurus

Cetiosauridae

Cetiosaurus oxoniensis

	Patagosaurus

	Cetiosaurus Rutland specimen

Mamenchisauridae

	Omeisaurus

	Mamenchisaurus

Turiasauria

	Jobaria

	Neosauropoda

References

1 2 3 Holtz, Thomas R. Jr. (2012) Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages, Winter 2011 Appendix.
↑ R. Lydekker. 1888. Catalogue of the Fossil Reptilia and Amphibia in the British Museum (Natural History). Part I. Containing the Orders Ornithosauria, Crocodilia, Dinosauria, Squamata, Rhynchocephalia, and Proterosauria. British Museum (Natural History), London 1-309
↑ Raveloson, M. L. T.; Clark, N. D.; Rasoamiaramana, A. H. (2019). "New Information on the Madagascan Middle Jurassic Sauropod Lapparentosaurus madagascariensis". Geosciences. 9 (12): 498. Bibcode:2019Geosc...9..498R. doi:10.3390/geosciences9120498.
1 2 Holwerda, Femke M.; Rauhut, Oliver W. M.; Pol, Diego (2021-07-22). "Osteological revision of the holotype of the Middle Jurassic sauropod dinosaur Patagosaurus fariasi Bonaparte, 1979 (Sauropoda: Cetiosauridae)". Geodiversitas. 43 (16). doi:10.5252/geodiversitas2021v43a16. hdl:11336/166442. ISSN 1280-9659. S2CID 237537773.