Callovian dinosaurs

Huayangosaurus is a genus of stegosaurian dinosaur from the Middle Jurassic of China. The name derives from "Huayang" (華陽), an alternate name for Sichuan (the province where it was discovered), and "saurus", meaning "lizard". It lived during the Bathonian to Callovian stages, around 165 million years ago, some 20 million years before its famous relative, Stegosaurus appeared in North America. At only approximately long, it was also much smaller than its famous cousin. Found in the Lower Shaximiao Formation, Huayangosaurus shared the local Middle Jurassic landscape with the sauropods Shunosauru

Agilisaurus (; 'agile lizard') is a genus of ornithischian dinosaur from the Middle Jurassic Period of what is now eastern Asia. The only named species is A. louderbacki, recovered from the Lower Shaximiao Formation of Sichuan, China. It was about in length, in hip height, and in weight. It has leaf-shaped teeth that were well-adapted to its abrasive, plant-based diet. Most surprisingly, the wavy enamel of the teeth of this genus (and all other ornithopods), presumed to make them more resistant to wear, was previously thought to be exclusive to hadrosaurs. This is also the case for Changchunsa

Gasosaurus () is a genus of tetanuran theropod that lived approximately 171.6 to 161.2 million years ago during the middle of the Jurassic Period. The name "Gasosaurus" is derived from the English "gasoline" and the Greek () ("lizard / generic reptile"). Only one species is currently recognised, G. constructus, from which the specific name honours the gasoline company that found the Dashanpu fossil quarry in Sichuan Province, China, now named as the Lower Shaximiao Formation.

Yangchuanosaurus is an extinct genus of metriacanthosaurid theropod dinosaur that lived in China from the Middle Jurassic to Late Jurassic periods (Bathonian to Tithonian stages), and was similar (although slightly larger) in size and appearance to its North American and European relative, Allosaurus. Yangchuanosaurus hails from the Upper Shaximiao Formation and was the largest predator in a landscape that included the sauropods Mamenchisaurus and Omeisaurus and the stegosaurs Chialingosaurus, Tuojiangosaurus and Chungkingosaurus. This theropod was named after the area in which was discovered,

Abrosaurus (; 'delicate lizard' from the Greek '''''''''' meaning 'delicate' or 'dainty' and '''''' meaning 'lizard') is a genus of macronarian sauropod dinosaur from the Middle Jurassic Period of what is now Asia. It is one of many dinosaurs found at the Dashanpu Quarry in the Sichuan Province of China. Like most sauropods, Abrosaurus was a quadrupedal herbivore. It was rather small for a sauropod, measuring no more than long. Its head was boxy and topped with a tall, bony arch containing the nostrils. The generic name refers to the nature of the skull, with large openings separated by thin,

genus of reptiles (fossil)

Epidexipteryx is a genus of small maniraptoran dinosaurs, known from one fossil specimen in the collection of the Institute of Vertebrate Paleontology and Paleoanthropology in Beijing. Epidexipteryx represents the earliest known example of ornamental feathers in the fossil record.

Scansoriopteryx ("climbing wing") is a genus of maniraptoran dinosaur. Described from only a single juvenile fossil specimen found in Liaoning, China, Scansoriopteryx is a sparrow-sized animal that shows adaptations in the foot indicating an arboreal (tree-dwelling) lifestyle. It possessed an unusual, elongated third finger which may have supported a membranous wing, much like the related Yi qi. The type specimen of Scansoriopteryx also contains the fossilized impression of feathers.

Xiaotingia is a genus of paravian theropod dinosaur, possibly an anchiornithid, from Middle Jurassic or early Late Jurassic deposits of western Liaoning, China. It contains a single species, Xiaotingia zhengi.

Lexovisaurus is a genus of stegosaurian dinosaur known from limb bones and armor fragments from Middle to Late Jurassic-aged strata of Europe.

Cetiosauriscus ( ) is a genus of sauropod dinosaur that lived between 166 and 164 million years ago during the Callovian (Middle Jurassic Period) in what is now England. A herbivore, Cetiosauriscus had – by sauropod standards – a moderately long tail, and longer forelimbs, making them as long as its hindlimbs. It has been estimated as about long and between in weight.

Chuandongocoelurus ( ) is a genus of carnivorous tetanuran theropod dinosaur from the Jurassic of China.

Callovosaurus (meaning "Callovian lizard") is a genus of iguanodontian dinosaur known from most of a left thigh bone discovered in Middle Jurassic-age rocks of England. At times, it has been considered dubious or a valid genus of basal iguanodontian, perhaps a dryosaurid.

Datousaurus (meaning "chieftain lizard" or "big-head lizard"; originally named using the Malay datu, after its Chinese nickname qiulong - literally "chieftain dragon" - but also a pun on its big head; da tou means "big head" in Chinese) is a sauropod dinosaur from the Middle Jurassic Lower Shaximiao Formation in Sichuan province, China. It shared the local Middle Jurassic landscape with other sauropods such as Shunosaurus, Omeisaurus, and Protognathosaurus, the neornithischian Xiaosaurus, and the early stegosaur Huayangosaurus as well as the carnivorous Gasosaurus.

Ferganasaurus (meaning "Fergana Valley lizard") is a genus of sauropod dinosaur that lived in the Balabansai Formation of Kyrgyzstan, which dates to the Callovian stage of the Middle Jurassic. It was formally described in 2003 by Alifanov and Averianov as the type species Ferganasaurus verzilini. It is believed to be similar to Rhoetosaurus.

Klamelisaurus (meaning "Kelameili Mountains lizard") is a genus of herbivorous sauropod dinosaur from the Middle Jurassic Shishugou Formation of China. The type species is Klamelisaurus gobiensis, which was named by Zhao Xijin in 1993, based on a partial skeleton discovered in 1982 near the abandoned town of Jiangjunmiao. Zhao described Klamelisaurus as the only member of a new subfamily, Klamelisaurinae, among the now-defunct primitive sauropod order Bothrosauropodoidea. Since Zhao's description, Klamelisaurus received limited attention from researchers until Andrew Moore and colleagues redes

Wiehenvenator is a genus of megalosaurid theropod dinosaur from the Middle Jurassic (Callovian) of north western Germany. The genus contains a single species, W. albati.

Sarcolestes (from Ancient Greek σάρξ (sárx), meaning "flesh", and λῃστής (lēistḗs), meaning "robber", and thus, "flesh robber") is an extinct genus of ankylosaurian ornithischian dinosaur from the Oxford Clay of England. The current type and only species is S. leedsi, and the holotype is a single partial left mandible. The genus and species were named in 1893 by Richard Lydekker, who thought they belonged to a theropod.

Ferganocephale is a dubious genus of neornithischian dinosaur. It was from the Middle Jurassic Balabansai Svita of Kyrgyzstan. The type and only species is F. adenticulatum.

Dashanpusaurus (meaning "Dashanpu lizard" after the township it was discovered in) is an extinct genus of sauropod dinosaur that lived during the middle of the Jurassic period. The dinosaur was described in 2005 by Peng Guangzhao, Ye Yong, Gao Yuhui, Shu Chunkang, and Jiang Shan. Its type and only species is Dashanpusaurus dongi, named in honor of the paleontologist Dong Zhiming.

Kaijiangosaurus (meaning "Kaijiang lizard") is a genus of carnivorous tetanuran theropod dinosaur from the Middle Jurassic of China. In 1984 He Xinlu named and described the type species Kaijiangosaurus lini. The generic name refers to the River (jiang) Kai. The specific name honours the paleontologist Lin Wenqiu.

Loricatosaurus (meaning "armored lizard") is a genus of stegosaurid dinosaur known from Callovian-aged (Middle Jurassic) rocks of England and France.

Alpkarakush is an extinct genus of metriacanthosaurid theropod dinosaurs from the Jurassic Balabansai Formation of Kyrgyzstan. The genus contains a single species, A. kyrgyzicus, known from a partial skeleton.

Hexinlusaurus is a genus of basal ornithischian dinosaur from the Middle Jurassic (Bajocian stage) Lower Shaximiao Formation of what is now China. The type and only species is Hexinlusaurus multidens.

Pulaosaurus (meaning "Pulao lizard") is an extinct genus of neornithischian dinosaur from the mid-Jurassic (Callovian–Oxfordian ages) Tiaojishan Formation of Hebei, China. The genus contains a single species, Pulaosaurus qinglong, known from a nearly complete articulated skeleton including the skull and soft tissue impressions. It is one of the only non-avian dinosaurs known to preserve a larynx (voicebox), suggesting it may have made bird-like vocalizations. Pulaosaurus is the first neornithischian named from the Yanliao Biota, though members of this clade have been known from other fossil be

Xinjiangtitan () is an extinct genus of mamenchisaurid sauropod that lived during the Middle Jurassic of what is now Xinjiang, northwestern China. Its type and only species is Xinjiangtitan shanshanesis (), known from a single incomplete skeleton recovered from the Qiketai Formation. The holotype preserves one of the most complete vertebral columns of any sauropod found in Asia, and has the longest complete neck known for any animal.

Zigongosaurus (meaning "Zigong lizard") is a genus of sauropod dinosaur from the Middle-Late Jurassic-aged Shaximiao Formation of Zigong, Sichuan, China. Because of incomplete knowledge of Jurassic Chinese sauropods, it has been hard to interpret, with some sources assigning it to Omeisaurus, some to Mamenchisaurus, and some to its own genus.

Protognathosaurus (meaning "early jaw lizard") is a genus of herbivorous sauropod dinosaur from the Middle Jurassic Lower Shaximiao Formation in Sichuan, present-day China.

Chebsaurus is a genus of sauropod dinosaur, specifically a eusauropod. It lived in present-day Algeria, in the Callovian aged Aïssa Formation. The type species, C. algeriensis, was named in 2005 by Mahammed et al. and is the most complete Algerian sauropod known. It was around long.

Bashunosaurus is a genus of potentially macronarian sauropod dinosaur from the Middle Jurassic Shaximiao Formation of Kaijiang, China. The type and only species is Bashunosaurus kaijiangensis.