Cetiosauridae

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]

Cetiosauridae Temporal range: Late Toarcian—Callovian, 178–161 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Restoration of Cetiosaurus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	†Sauropodomorpha
Clade:	†Sauropoda
Clade:	†Eusauropoda
Family:	†Cetiosauridae Lydekker, 1888
Subgroups[1]
†Cetiosaurus †Chebsaurus? †Ferganasaurus? †Lapparentosaurus? †Patagosaurus †Perijasaurus? †"Rutellum"? †Mamenchisaurinae?

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