Vidarte et al., 2016
Vidarte et al., 2016
Magnamanus is a large ornithopod, with an estimated length of between nine and ten meters, and weight over three tons—a similar size to Iguanodon bernissartensis. The hand is broad and similar to other basal members of Iguanodontia, with a protruding thumb spine and a fifth finger.
The descriptors established nine distinctive features for this taxon, all autapomorphies. The dentary contributes to the front coronoid process of the lower jaw so that the last dentary tooth is located on the slope of the protrusion, instead of on the basis of it. The length of the shoulder amounts to six times the upper width, and seven times the minimum width. In the shoulder the front processus acromion is facing on the other side of the rear projection. When the humerus is the inner corner of the upper edge is not in the same plane as the outer bottom joint ball, which makes contact with the radius, and the outer bump is located above the level of the inner cusp which, for the ulna. In the ulna, the lower end is wider than the upper, and club-shaped. The lower end of the radius is clavate. The wrist consists of three elements, one of which is a fusion of the radial and intermedial, and the second is a fusion of the ulnar carpal, and the third and the third party is identical to the fifth carpal. The formula of the phalanges is 1-3-3-2- (3/4). The width of the wrist is 70% of the length of the hand. The processus praepubicus is straight without widening at the end or grooves, and in the base is not closed, the obturator foramen in the base and is half covered on the inside with a flat bone plate.
In the early twenty-first century Carolina Fuentes and Manuel Meijide conducted excavations along with their children on the Zorralbo I site in the marshes of Golmayo, five kilometers west of Soria. Between 2000 and 2004 they dug up the skeleton of a euornithopod, one of the most complete skeletons of a dinosaur from the Lower Cretaceous of Spain that has been found.
In 2016 the type species Magnamanus soriaensis was named and described by Carolina Fuentes Vidarte, Manuel Calvo Meijide, Federico Meijide Fuentes and Manuel Fuentes Meijide. The genus name is a combination of the Latin word magnus "large" and manus, "hand", a reference to the big hands of the animal. The specific name refers to its origin in Soria.
The fossils, with catalogue numbers MNS 2000/132, 2001/122, 2002/95, 2003/69, 2004/54, were found in the Golmayo Formation which dates from the Hauterivian - Barremian, about 130 million years old. It consists of a partial skeleton with skull and lower jaws. Have been preserved: parts of the maxilla, a piece of premaxilla, a left dentary piece, a piece of the right surangular, pieces of the hyoid apparatus, loose edges of alveolar ridge, sixty two loose teeth from the upper jaw, thirty-six loose teeth from the lower jaw, a proatlas, a centrum of a cervical vertebra, a neck rib, four dorsal vertebrae, thirty-six pieces of the sacrum, thirty-two caudal vertebrae, six ribs, three complete chevrons, pieces of chevrons, ossified tendons, the right shoulder blade (scapula), both coracoids, both humeri, the right-hand radius, the left ulna, the right hand thumb, the right hand, a piece of left iliac, the processus praepubici of the two pubic bones, a piece of the right femur, a part of the right tibia, and the second and fourth metatarsals of the right leg. The bones are not found in association but were spread over an area of eight square meters. They were considered as belonging to a single individual, an old adult animal that is seen as the holotype. The holotype is now part of the collection of the Museo Numantino in Soria (NMS).
Aquilarhinus (meaning "eagle snout" after the unusual beak morphology) is a genus of hadrosaurid ornithopod dinosaur from the Aguja Formation from Texas in the United States. The type and only species is Aquilarhinus palimentus. Due to its unusual dentary, it has been inferred to have had shovel-like beak morphology, different from the beaks of other hadrosaurs. It was originally classified as a Kritosaurus sp. before being reclassified as a new genus in 2019.Aralosaurini
Aralosaurini is a tribe of basal lambeosaurine hadrosaurs endemic to Eurasia. It currently contains Aralosaurus (from the Aral sea of Kazakhstan) and Canardia (from Toulouse, Southern France).Canardia
Canardia is an extinct genus of aralosaurin lambeosaurine dinosaur known from the Late Cretaceous Marnes d’Auzas Formation (late Maastrichtian stage) of Toulouse, Haute-Garonne Department, southern France. The type species Canardia garonnensis was first described and named by Albert Prieto-Márquez, Fabio M. Dalla Vecchia, Rodrigo Gaete and Àngel Galobart in 2013.Choyrodon
Choyrodon is a genus of hadrosauroid dinosaur from the Early Cretaceous Albian-age Khuren Dukh Formation of Mongolia. The type and only species is Choyrodon barsboldi. The generic name is derived from the city of Choyr, and -odon, from Greek for tooth; the specific name barsboldi honours paleontologist Rinchen Barsbold. The material consists of a holotype partial skull and cervical ribs, with two other partial skulls both with associated postcranial material. It was found to be the sister taxon of Eolambia.Elasmaria
Elasmaria is a clade of iguanodont ornithopods known from Cretaceous deposits in South America, Antarctica, and Australia.Huxleysaurus
Huxleysaurus (meaning "Huxley's lizard") is a genus of herbivorous styracosternan ornithopod dinosaur.Iguanodontia
Iguanodontia (the iguanodonts) is a clade of herbivorous dinosaurs that lived from the Middle Jurassic to Late Cretaceous. Some members include Camptosaurus, Dryosaurus, Iguanodon, Tenontosaurus, and the hadrosaurids or "duck-billed dinosaurs". Iguanodontians were one of the first groups of dinosaurs to be found. They are among the best known of the dinosaurs, and were among the most diverse and widespread herbivorous dinosaur groups of the Cretaceous period.Jaxartosaurus
Jaxartosaurus is a genus of hadrosaurid dinosaur similar to Corythosaurus which lived during the Late Cretaceous. Its fossils were found in Kazakhstan.Jeyawati
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Koshisaurus is a monospecific genus of basal hadrosauroid from the Kitadani Formation in Japan. The discovery of the genus suggests that hadrosauroids had higher diversity along the eastern margin of Asia in the Early Cretaceous. "Koshi" means an old Japanese regional name including Fukui prefecture where fossils of the genus were discovered.Laiyangosaurus
Laiyangosaurus ("Laiyang lizard") is a genus of saurolophine hadrosaurid from the Late Cretaceous of China. It is known from one species, L.youngi, found in the Laiyang Basin within the province of Shandong.Lambeosaurinae
Lambeosaurinae is a group of crested hadrosaurid dinosaurs.Lapampasaurus
Lapampasaurus is an extinct genus of hadrosaurid known from the Late Cretaceous Allen Formation (late Campanian or early Maastrichtian stage) of La Pampa Province, Argentina. It contains a single species, Lapampasaurus cholinoi.The generic name refers to the Argentine province of La Pampa. The specific name honours the late collector José Cholino. The material includes cervical, dorsal, sacral and caudal vertebrae, the forelimb girdle, and the partial hindlimb.Osmakasaurus
Osmakasaurus is a genus of herbivorous iguanodontian dinosaur. It is a basal iguanodontian which lived during the lower Cretaceous period (Valanginian age) in what is now Buffalo Gap of South Dakota, United States. It is known from the Chilson Member of the Lakota Formation. This genus was named by Andrew T. McDonald in 2011 and the type species is Osmakasaurus depressus. O. depressus was previously referred to as Camptosaurus depressus, and was first described in 1909 by Charles W. Gilmore.Pareisactus
Pareisactus (from the Greek "pareisaktos", meaning "intruder", referring to being represented as a single element among hundreds of hadrosaurid bones) is a genus of rhabdodontid ornithopod dinosaur from the Late Cretaceous Conquès Member of the Tremp Formation in the Southern Pyrenees of Spain. The type and only species is P. evrostos, known only from a single scapula.Plesiohadros
Plesiohadros is an extinct genus of hadrosauroid dinosaur. It is known from a partial skeleton including the skull collected at Alag Teg locality, from the Campanian Djadochta Formation of southern Mongolia. The type species is Plesiohadros djadokhtaensis.Sahaliyania
Sahaliyania (from "black" in Manchu, a reference to the Amur/Heilongjiang River) is a genus of lambeosaurine hadrosaurid dinosaur (crested duckbilled dinosaur) from the Late Cretaceous of Heilongjiang, China.Tsintaosaurini
Tsintaosaurini is a tribe of basal lambeosaurine hadrosaurs native to Eurasia. It currently contains only Tsintaosaurus (from China) and Pararhabdodon (from Spain ).Koutalisaurus, also known from late Cretaceous Spain and formerly referred to Pararhabdodon
, may also be a tsintaosaurin because of its association with the latter genus; some recent work also suggests it may indeed be referrable to Pararhabdodon.Xuwulong
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