|
Heterodontosaurids
Heterodontosauridae is a family of ornithischian dinosaurs that were likely among the most basal (primitive) members of the group. Their phylogenetic placement is uncertain but they are most commonly found to be primitive, outside of the group Genasauria. Although their fossils are relatively rare and their group small in numbers, they have been found on all continents except Australia and Antarctica, with a range spanning the Early Jurassic to the Early Cretaceous. Heterodontosaurids were fox-sized dinosaurs less than in length, including a long tail. They are known mainly for their characteristic teeth, including enlarged canine-like tusks and cheek teeth adapted for chewing, analogous to those of Cretaceous hadrosaurids. Their diet was herbivorous or possibly omnivorous. Description Among heterodontosaurids, only ''Heterodontosaurus'' itself is known from a complete skeleton. Fragmentary skeletal remains of ''Abrictosaurus'' are known but have not been fully described, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterodontosauridae Size Comparison By PaleoGeek
Heterodontosauridae is a family of ornithischian dinosaurs that were likely among the most basal (primitive) members of the group. Their phylogenetic placement is uncertain but they are most commonly found to be primitive, outside of the group Genasauria. Although their fossils are relatively rare and their group small in numbers, they have been found on all continents except Australia and Antarctica, with a range spanning the Early Jurassic to the Early Cretaceous. Heterodontosaurids were fox-sized dinosaurs less than in length, including a long tail. They are known mainly for their characteristic teeth, including enlarged canine-like tusks and cheek teeth adapted for chewing, analogous to those of Cretaceous hadrosaurids. Their diet was herbivorous or possibly omnivorous. Description Among heterodontosaurids, only ''Heterodontosaurus'' itself is known from a complete skeleton. Fragmentary skeletal remains of ''Abrictosaurus'' are known but have not been fully described, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterodontosaurus Tucki
''Heterodontosaurus'' is a genus of heterodontosaurid dinosaur that lived during the Early Jurassic, 200–190 million years ago. Its only known member species, ''Heterodontosaurus tucki'', was named in 1962 based on a skull discovered in South Africa. The genus name means "different toothed lizard", in reference to its unusual, heterodont dentition; the specific name honours G. C. Tuck, who supported the discoverers. Further specimens have since been found, including an almost complete skeleton in 1966. Though it was a small dinosaur, ''Heterodontosaurus'' was one of the largest members of its family, reaching between and possibly in length, and weighing between . The skull was elongated, narrow, and triangular when viewed from the side. The front of the jaws were covered in a horny beak. It had three types of teeth; in the upper jaw, small, incisor-like teeth were followed by long, canine-like tusks. A gap divided the tusks from the chisel-like cheek-teeth. The body was s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterodontosaurus
''Heterodontosaurus'' is a genus of heterodontosaurid dinosaur that lived during the Early Jurassic, 200–190 million years ago. Its only known member species, ''Heterodontosaurus tucki'', was named in 1962 based on a skull discovered in South Africa. The genus name means "different toothed lizard", in reference to its unusual, heterodont dentition; the specific name honours G. C. Tuck, who supported the discoverers. Further specimens have since been found, including an almost complete skeleton in 1966. Though it was a small dinosaur, ''Heterodontosaurus'' was one of the largest members of its family, reaching between and possibly in length, and weighing between . The skull was elongated, narrow, and triangular when viewed from the side. The front of the jaws were covered in a horny beak. It had three types of teeth; in the upper jaw, small, incisor-like teeth were followed by long, canine-like tusks. A gap divided the tusks from the chisel-like cheek-teeth. The body was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abrictosaurus
''Abrictosaurus'' (; "wakeful lizard") is a genus of heterodontosaurid dinosaur that lived during the Early Jurassic in what is now in parts of southern Africa such as Lesotho and South Africa. It was a bipedal herbivore or omnivore and was one of the most basal heterodontosaurids. It was approximately long and weighed between . This dinosaur is known from the fossil remains of only two individuals, found in the Upper Elliot Formation of Qacha's Nek District in Lesotho and Cape Province in South Africa. The Upper Elliot is thought to date from the Hettangian and Sinemurian stages of the Early Jurassic Period, approximately 200 to 190 million years ago. This formation is thought to preserve sand dunes as well as seasonal floodplains, in a semiarid environment with sporadic rainfall. Other dinosaurs found in this formation include the theropod ''Megapnosaurus'', the sauropodomorph ''Massospondylus'', as well as other heterodontosaurids like ''Heterodontosaurus'' and ''Lycorh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterodontosaurinae
Heterodontosaurinae is an extinct subfamily of heterodontosaurid ornithischian dinosaurs from the earliest to the mid Middle Jurassic (Hettangian to Bajocian) of Africa and South America. Currently, the basalmost known heterodontosaurine is '' Lycorhinus angustidens'' from the Early Jurassic of Cape Province, South Africa. Heterodontosaurines are small-bodied ornithischians characterized by their cheek tooth crowns that are taller than wide, and jaw joint set below the axis of occlusion between maxillary and dentary teeth. Heterodontosaurinae was implicitly named in 1966 by Oskar Kuhn as he is the author of the family Heterodontosauridae. It is a stem-based taxon defined phylogenetically for the first time by Paul Sereno in 2012 as "the most inclusive clade containing ''Heterodontosaurus tucki'' but not ''Tianyulong confuciusi'', ''Fruitadens haagarorum ''Fruitadens'' is a genus of heterodontosaurid dinosaur. The name means "Fruita teeth", in reference to Fruita, Colorado (U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinodon
''Echinodon'' is a genus of heterodontosaurid dinosaur that lived during the earliest Cretaceous of southern England and possibly western France in the Berriasian epoch. The first specimens were jaw bones named ''Echinodon becklesii'' by Sir Richard Owen in 1861, and since their original description only additional teeth have been discovered. The specific name honours collector Samuel Beckles who discovered the material of ''Echinodon'' and many other taxa from across England, while the genus name translates as "prickly tooth" in reference to the dental anatomy of the taxon. Originally, ''Echinodon'' was considered to be a type of herbivorous lizard, though this was quickly revised to an intermediate ornithischian. It was referred to the clade Stegosauria based on general dental anatomy and incorrectly referred armour that was later identified as a turtle's. ''Echinodon'' was then referred to the early ornithischian family Fabrosauridae, which was later identified as an artificia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fruitadens
''Fruitadens'' is a genus of heterodontosaurid dinosaur. The name means "Fruita teeth", in reference to Fruita, Colorado (USA), where its fossils were first found. It is known from partial skulls and skeletons from at least four individuals of differing biological ages, found in Tithonian (Late Jurassic) rocks of the Morrison Formation in Colorado. ''Fruitadens'' is one of the smallest known ornithischian dinosaur, with young adults estimated at in length and in weight. It is interpreted as an omnivore and represents one of the latest-surviving heterodontosaurids. History of discovery ''Fruitadens'' is known from fossils recovered under a valid paleontological permit in the 1970s and 1980s by teams led by George Callison, for the Natural History Museum of Los Angeles County (LACM). The discovery area, on lands managed by the Bureau of Land Management, is known as the Fruita Paleontological Area; the specimens were found there in sandstones of the Brushy Basin Member. Roug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geranosaurus
''Geranosaurus'' (meaning "crane reptile") is a genus of ornithischian dinosaur from the Early Jurassic. It is known only from crushed fragments of the skull, a single jaw bone with nine tooth stubs and limb elements discovered in the Clarens Formation The Clarens Formation is a geological formation found in several localities in Lesotho and in the Free State, KwaZulu-Natal, and Eastern Cape provinces in South Africa. It is the uppermost of the three formations found in the Stormberg Group of ..., South Africa in 1871. Because of the limited remains, it is considered a ''nomen dubium''. It is classified as an ornithischian based on the jaw, probably a heterodontosauridae, heterodontosaurid.P. C. Sereno. 2012. Taxonomy, morphology, masticatory function and phylogeny of heterodontosaurid dinosaurs. ''Zookeys'' 226:1-225 [M. Carrano/M. Carrano] It was around tall and around long when fully grown. The type species, ''G. atavus'', was described by Robert Broom in 1911.R. Broom, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tianyulong
''Tianyulong'' (Chinese: 天宇龍; Pinyin: ''tiānyǔlóng''; named for the Shandong Tianyu Museum of Nature where the holotype fossil is housed) is an extinct genus of heterodontosaurid ornithischian dinosaur. The only species is ''T. confuciusi,'' whose remains were discovered in Jianchang County, Western Liaoning Province, China. History The holotype of ''Tianyulong'', STMN 26-3 was initially reported as being from the Early Cretaceous Jehol group. The fossil was collected at a locality transliterated as Linglengta or Linglongta. Lu ''et al.'', 2010, reported that these beds were actually part of the Tiaojishan Formation, dating from the late Jurassic period at least 158.5 million years ago.Liu Y.-Q. Kuang H.-W., Jiang X.-J., Peng N., Xu H. & Sun H.-Y. (2012). "Timing of the earliest known feathered dinosaurs and transitional pterosaurs older than the Jehol Biota." ''Palaeogeography, Palaeoclimatology, Palaeoecology'' (advance online publication). Another specimen, IVPP ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lycorhinus
''Lycorhinus'' is a genus of heterodontosaurid ornithischian dinosaur from the Early Jurassic (Hettangian to Sinemurian ages) strata of the Elliot Formation located in the Cape Province, South Africa. Description ''Lycorhinus'', including the remains described by Gow in 1975 as ''Lanasaurus'', is a small ( in length) herbivorous dinosaur despite the long canines it sported in its jaws. History of discovery The fossil material consists of dentaries and maxillae, hence the characters mentioned by the name ''Lycorhinus angustidens'' that Sidney H. Haughton attributed to the remains in 1924, where the generic name means "wolf snout", as it was at first misidentified as a cynodont, and the specific descriptor means "constricted tooth". The holotype, SAM 3606, consists of a mandible found by Dr M. Ricono. Three other species of ''Lycorhinus'' have been named. ''Lycorhinus parvidens'' was created by Robert Broom and ''Lycorhinus tucki'' by Richard Anthony Thulborn in 1970 renaming ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Herbivore
A herbivore is an animal anatomically and physiologically adapted to eating plant material, for example foliage or marine algae, for the main component of its diet. As a result of their plant diet, herbivorous animals typically have mouthparts adapted to rasping or grinding. Horses and other herbivores have wide flat teeth that are adapted to grinding grass, tree bark, and other tough plant material. A large percentage of herbivores have mutualistic gut flora that help them digest plant matter, which is more difficult to digest than animal prey. This flora is made up of cellulose-digesting protozoans or bacteria. Etymology Herbivore is the anglicized form of a modern Latin coinage, ''herbivora'', cited in Charles Lyell's 1830 ''Principles of Geology''.J.A. Simpson and E.S.C. Weiner, eds. (2000) ''The Oxford English Dictionary'', vol. 8, p. 155. Richard Owen employed the anglicized term in an 1854 work on fossil teeth and skeletons. ''Herbivora'' is derived from Latin ''herba' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Omnivore
An omnivore () is an animal that has the ability to eat and survive on both plant and animal matter. Obtaining energy and nutrients from plant and animal matter, omnivores digest carbohydrates, protein, fat, and fiber, and metabolize the nutrients and energy of the sources absorbed. Often, they have the ability to incorporate food sources such as algae, fungi, and bacteria into their diet. Omnivores come from diverse backgrounds that often independently evolved sophisticated consumption capabilities. For instance, dogs evolved from primarily carnivorous organisms ( Carnivora) while pigs evolved from primarily herbivorous organisms (Artiodactyla). Despite this, physical characteristics such as tooth morphology may be reliable indicators of diet in mammals, with such morphological adaptation having been observed in bears. The variety of different animals that are classified as omnivores can be placed into further sub-categories depending on their feeding behaviors. Frugivor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
_grazing_-_20050809.jpg "Click for more on -> Herbivore")
