|
Spinosaurids
Spinosauridae (or spinosaurids) is a clade or family of tetanuran theropod dinosaurs comprising ten to seventeen known genera. Spinosaurid fossils have been recovered worldwide, including Africa, Europe, South America, and Asia. Their remains have generally been attributed to the Early to early Late Cretaceous. Spinosaurids were large bipedal carnivores. Their crocodilian-like skulls were long, low, and narrow, bearing conical teeth with reduced or absent serrations. The tips of their upper and lower jaws fanned out into a spoon-shaped structure similar to a rosette, behind which there was a notch in the upper jaw that the expanded tip of the lower jaw fit into. The nostrils of spinosaurids were retracted to a position further back on the head than in most other theropods, and they had bony crests on their heads along the midline of their skulls. Their robust shoulders wielded stocky forelimbs, with three-fingered hands that bore an enlarged claw on the first digit. In many s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baryonyx
''Baryonyx'' () is a genus of theropod dinosaur which lived in the Barremian stage of the Early Cretaceous period, about 130–125 million years ago. The first skeleton was discovered in 1983 in the Smokejack Clay Pit, of Surrey, England, in sediments of the Weald Clay Formation, and became the holotype specimen of ''Baryonyx walkeri'', named by palaeontologists Alan J. Charig and Angela C. Milner in 1986. The genus name ''Baryonyx'' comes from Ancient Greek βαρύς (''barús''), meaning "heavy" or "strong", and ὄνυξ (''ónux''), meaning "claw", alluding to the animal's very large claw on the first finger; the specific name, ''walkeri'', refers to its discoverer, amateur fossil collector William J. Walker. The holotype specimen is one of the most complete theropod skeletons from the UK (and remains the most complete spinosaurid), and its discovery attracted media attention. Specimens later discovered in other parts of the United Kingdom and Iberia have also bee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irritator
''Irritator'' is a genus of Spinosauridae, spinosaurid dinosaur that lived in what is now Brazil during the Albian Geological stage, stage of the Early Cretaceous Geological period, Period, about 113 to 110 million years ago. It is known from a nearly complete skull found in the Romualdo Formation of the Araripe Basin. Fossil dealers had acquired this skull and sold it to the State Museum of Natural History Stuttgart. In 1996 in paleontology, 1996, the specimen became the holotype of the type species ''Irritator challengeri''. The genus name comes from the word "irritation", reflecting the feelings of paleontologists who found the skull had been heavily damaged and altered by the collectors. The species name is a homage to the fictional character Professor Challenger from Arthur Conan Doyle's novels. Some paleontologists regard ''Angaturama limai''—known from a snout tip that was described a few weeks later also in 1996—as a potential junior synonym of ''Irritator''. Both ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ichthyovenator
''Ichthyovenator'' is a genus of spinosaurid dinosaur that lived in what is now Laos, sometime between 120 and 113 million years ago, during the Aptian Stage (geology), stage of the Early Cretaceous Period (geologic time), period. It is known from fossils collected from the Grès supérieurs Formation of the Savannakhet Basin, the first of which were found in 2010, consisting of a partial skeleton without the skull or limbs. This specimen became the holotype of the new genus and species ''Ichthyovenator laosensis'', and was described by palaeontologist Ronan Allain and colleagues in 2012 in archosaur paleontology, 2012. The generic name, meaning "fish hunter", refers to its assumed piscivorous lifestyle, while the specific name alludes to the country of Laos. In 2014, it was announced that more remains from the dig site had been recovered; these fossils included teeth, more Glossary of dinosaur anatomy#vertebrae, vertebrae (backbones) and a Glossary of dinosaur anatomy#pubi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cristatusaurus
''Cristatusaurus'' is a genus of theropod dinosaur that lived during the Early Cretaceous Geological period, Period of what is now Niger, 112 million years ago. It was a baryonychine member of the Spinosauridae, a group of large Bipedalism, bipedal carnivores with well-built forelimbs and elongated, crocodile-like skulls. The type species ''Cristatusaurus lapparenti'' was named in 1998 in paleontology, 1998 by scientists Philippe Taquet and Dale Russell, on the basis of jaw bones and some vertebrae. Two claw fossils were also later assigned to ''Cristatusaurus''. The animal's Generic name (biology), generic name, which means "crested reptile", alludes to a sagittal crest on top of its snout; while the Specific name (zoology), specific name is in honor of the French paleontologist Albert-Félix de Lapparent. ''Cristatusaurus'' is known from the Albian to Aptian Erlhaz Formation, Elrhaz Formation, where it would have coexisted with Sauropoda, sauropod and iguanodontian dinosaurs, ot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
