WCetiosauriscus is a genus of sauropod dinosaur that lived between 166 and 164 million years ago during the Callovian 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 15 m (49 ft) long and between 4 and 10 t in weight.
WCoelodus is an extinct genus of pycnodontiform fish from the Late Jurassic to early Paleocene (Danian). Fossils of the genus have been found in:JurassicGardies, FranceCretaceousYacoraite Formation, Argentina El Molino Formation, Bolivia Baharîje Formation, Egypt Ahlen and Bückeberg Formations, Germany Nimar Formation, India Alburni, Italy Damergou, Zinder, Niger Cochirleni Formation, Romania La Huérguina and Cabana Formations, Spain Pierre Shale, Kansas Tunbridge Wells Sand Formation, England Tucumcari Formation, New Mexico Twin Mountains and Paluxy Formations, TexasPaleoceneTremp Formation, Spain
WCryptoclidus is a genus of plesiosaur reptile from the Middle Jurassic period of England, France, and Cuba.
WDendrorhynchoides was a genus of anurognathid pterosaur containing only the holotype species D. curvidentatus that is known from the Middle Jurassic Tiaojishan Formation of Qinglong, northern Hebei Province, China.
WGobiconodon is an extinct genus of carnivorous mammal from the early Cretaceous. It weighed 10–12 pounds (4.5–5.4 kg) and measured 18–20 inches (460–510 mm). It was one of the largest mammals known from the Mesozoic. Like other gobiconodontids, it possesses several speciations towards carnivory, such as shearing molar teeth, large canine-like incisors and powerful jaw and forelimb musculature, indicating that it probably fed on vertebrate prey; rather uniquely among predatory mammals and other eutriconodonts, the lower canines were vestigial, with the first lower incisor pair having become massive and canine-like. Like the larger Repenomamus there might be some evidence of scavenging.
WKepplerites is a moderately evolute ammonite from the lower Callovian included in the Stephanoceratoidea.
WLoricatosaurus is a dinosaur of family Stegosauridae from Callovian-age rocks of England and France.
WMonolophosaurus is a genus of tetanuran theropod dinosaur from the Middle Jurassic Shishugou Formation in what is now Xinjiang, China. It was named for the single crest on top of its skull. Monolophosaurus was a mid-sized theropod at about 5 metres long.
WNarindasaurus is a genus of turiasaurian sauropod dinosaur from the Middle Jurassic Isalo III Formation of Madagascar. The type species, N. thevenini was formally described by Royo-Torres et al. in 2020. The holotype, which consists of one specimen, is currently stored at the Muséum national d’Histoire naturelle and has been since 1906 or 1907.
WNeosteneosaurus is a genus of machimosaurid, known form the Middle Jurassic Oxford Clay of the UK, and Marnes de Dives, France. The type species, N. edwardsi, was originally named as a species of Steneosaurus in 1868, but was moved to its own genus in 2020. Steneosaurus durobrivensis and Steneosaurus hulkei are considered a junior synonym.
WPachyceras is a genus of perisphinctoid ammonites from the Middle Jurassic, upper Callovian stage, and is the type genus for the family Pachyceratidae. The shell is involute, subglobular, with a deep umbilicus and flattened flanks that slope toward a more narrowly rounded venter, and covered by low, widely spaced ribs.
WPeltoceras is an extinct ammonite genus from the aspidoceratid subfamily Peltoceratinae that lived during the later part of the Middle Jurassic.
WProexochokefalos is an extinct genus of machimosaurid teleosauroid from the Jurassic of France
WSteneosaurus is a dubious genus of teleosaurid crocodyliform from the Middle or Late Jurassic of France. The genus has been used as a wastebasket taxon for thalattosuchian fossils for over two centuries, and almost all known historical species of teleosauroid have been included within it at one point. The genus has remained a wastebasket, with numerous species still included under the label ‘Steneosaurus’, many of which are unrelated to each other.
WStreptospondylus is a genus of tetanuran theropod dinosaur known from the Late Jurassic period of France, 161 million years ago. It was a medium-sized predator with an estimated length of 6 meters and a weight of 500 kg (1,100lbs).
WTyrannoneustes is an extinct genus of geosaurine metriorhynchid crocodyliform from the Callovian stage Oxford Clay Formation of England and the Marnes de Dives of France. It contains a single species, Tyrannoneustes lythrodectikos, meaning "blood-biting tyrant swimmer". The genus was rediscovered after a century of storage in a museum basement after being unearthed by fossil hunter Alfred Nicholson Leeds between the years of 1907 and 1909. Its lower jaw measured about 26 inches long and its teeth were blade-like, likely built to attack prey as large or larger than itself, similar to the Late Jurassic Dakosaurus, Torvoneustes, and Plesiosuchus.
WWiehenvenator is a genus of predatory megalosaurid theropod dinosaur from the Middle Jurassic (Callovian) of Germany.