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Anchisauria
Sauropodiformes is an extinct clade of sauropodomorph dinosaurs that includes the animals more closely-related to Sauropoda than prosauropods like ''Massospondylus'' and '' Plateosaurus''. It was named in 2007 by Paul Sereno. Below is a cladogram of basal sauropodomorpha after Apaldetti and colleagues, 2021. Anchisauria is a smaller clade within Sauropodiformes. The name Anchisauria was first used Haekel and defined by Galton and Upchurch in the second edition of ''The Dinosauria''. It is a node-based taxon containing the most recent common ancestor of '' Anchisaurus polyzelus'' and '' Melanorosaurus readi'', and all its descendants. Galton and Upchurch assigned a family of dinosaurs to the Anchisauria: the Melanorosauridae. The more common prosauropods '' Plateosaurus'' and ''Massospondylus'' were placed in the sister clade Plateosauria. However, research has since indicated that ''Anchisaurus'' is closer to sauropod Sauropoda (), whose members are known as sauropods (; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leonerasaurus
''Leonerasaurus'' is a basal (phylogenetics), basal genus of Sauropodomorpha, sauropodomorph dinosaur. Currently, there is only one species known, named ''L. taquetrensis'' by Diego Pol, Alberto Garrido and Ignacio A. Cerda in 2011 in paleontology, 2011. The fossil, an incomplete Juvenile (organism), subadult individual, was found in the Las Leoneras Formation in Argentina. This formation is probably Early Jurassic in age. ''Leonerasaurus'' was a small non-sauropod sauropodomorph, showing an unusual combination of basal and derived characters. This indicates that the evolution of early sauropodomorphs witnessed a great degree of convergent evolution. Discovery The fossils assigned to ''Leonerasaurus'' were found near Cañadón Las Leoneras (an affluent of the left margin of the Chubut river), southeast of Sierra de Taquetrén, Chubut Province, Central Patagonia, Argentina. This formation is probably early Jurassic in age, interpreted as Pliensbachian to Toarcian or late Sine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mussaurus
''Mussaurus'' (meaning "mouse lizard") is a genus of herbivorous sauropodomorph dinosaur that lived in southern Argentina during the Sinemurian stage of the Early Jurassic. It receives its name from the small size of the skeletons of juvenile and infant individuals, which were once the only known specimens of the genus. However, since ''Mussaurus'' is now known from adult specimens, the name is something of a misnomer. In its early stages of life, ''Mussaurus'' was a small quadrupedalism, quadrupedal herbivore, walking on all four legs. As it grew up, the changes in body proportions may have led its centre of mass to move backwards towards its pelvis. Adults would have been medium-sized bipedalism, bipedal herbivores, measuring up to long and weighing up to . Numerous specimens of varying age found in a single locality suggest that ''Mussaurus'' is one of the earliest dinosaurs to have lived in a gregarious lifestyle. With its possible origin from the Triassic, this complex soci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aardonyx
''Aardonyx'' (Afrikaans ''aard'', "earth" + Greek , "nail, claw") is a genus of basal sauropodomorph dinosaur. It is known from the type species ''Aardonyx celestae'' found from the Early Jurassic Elliot Formation of South Africa. ''A. celestae'' was named after Celeste Yates, who prepared much of the first known fossil material of the species. It has arm features that are intermediate between basal sauropodomorphs and more derived sauropods. Based on the structure of the hind limbs and pelvic girdle of ''Aardonyx'', the dinosaur normally moved bipedally but could drop to quadrupedal movement similar to ''Iguanodon''. It shares some attributes with giant quadrupedal sauropods like '' Apatosaurus''.Associated Press (November 11, 2009)Scientists: New dinosaur species found in South AfricaNPR. Australian paleontologist Adam Yates and his team's discovery of the genus was published online before print in '' Proceedings of the Royal Society B'' in November 2009, and was schedu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lessemsaurus Sauropoides
''Lessemsaurus'' is an extinct genus of sauropodiform dinosaur belonging to Lessemsauridae. Naming and description The type species, ''L. sauropoides'', was formally described by José Fernando Bonaparte in 1999 in honor of Don Lessem, a writer of popular science books. It was found in the Los Colorados Formation of the Ischigualasto-Villa Unión Basin in La Rioja Province, Argentina.Weishampel, David B; ''et al.'', 2004. "Dinosaur distribution (Late Triassic, South America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 527–528. . It was discovered in strata dating to the Norian stage, around 210 million years ago. It is estimated to have reached long and weighed over , possibly up to , in maximum body mass. Classification A cladogram after Pol, Garrido & Cerda, 2011, illustrates a possible placing of ''Lessemsaurus'' and '' Antetonitrus'' in Sauropodomorpha: In 2018, Ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lamplughsaura
''Lamplughsaura'' is a genus of sauropodomorph dinosaur from the Sinemurian-age (Early Jurassic) Dharmaram Formation of India, dating from between 196 and 190 million years ago. The type and only species is ''Lamplughsaura dharmaramensis.'' It is known from several partial skeletons of a large quadrupedal animal up to 10 meters (33 ft) long, and was either a basal sauropod or, less likely, a more basal sauropodomorph. It was named after Pamela Lamplugh Robinson, founder of the Geological Studies Unit at Indian Statistical Institute The Indian Statistical Institute (ISI) is a public research university headquartered in Kolkata, India with centers in New Delhi, Bengaluru, Chennai and Tezpur. It was declared an Institute of National Importance by the Government of India und ..., Kolkata. References Anchisauria Dinosaur genera Sinemurian dinosaurs Fossil taxa described in 2007 Taxa named by Sankar Chatterjee Taxa named by Peter Galton Dinosaurs of I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anchisaurus
''Anchisaurus'' is a genus of basal sauropodomorph dinosaur. It lived during the Early Jurassic Period, and its fossils have been found in the red sandstone of the Upper Portland Formation, Northeastern United States, which was deposited from the Hettangian age into the Sinemurian age, between about 200 and 192 million years ago.Olsen, P.E. (2002)STRATIGRAPHY AND AGE OF THE EARLY JURASSIC PORTLAND FORMATION OF CONNECTICUT AND MASSACHUSETTS: A CONTRIBUTION TO THE TIME SCALE OF THE EARLY JURASSIC. Session No. 26 Studies of Depositional Systems and Sedimentary Rocks: In Honor of Edward Scudder Belt. 37th Annual Meeting (March 25–27, 2002). Until recently it was classed as a member of Prosauropoda. The genus name ''Anchisaurus'' comes from the Greek ''αγχι'' (') ; "near, close" + Greek ('); "lizard". ''Anchisaurus'' was coined as a replacement name for "''Amphisaurus''", which was itself a replacement name for Hitchcock's "''Megadactylus''", both of which had already bee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yunnanosaurus
''Yunnanosaurus'' ( ) is an extinct genus of sauropodomorph dinosaur that lived approximately 199 to 183 million years ago in what is now the Yunnan Province, in China, for which it was named. ''Yunnanosaurus'' was a large sized, moderately-built, ground-dwelling, quadrupedal herbivore, that could also walk bipedally, and ranged in size from 7 meters (23 feet) long and 2 m (6.5 ft) high to 4 m (13 ft) high in the largest species. Discovery Yang Zhongjian (also known as C. C. Young) discovered the first ''Yunnanosaurus'' skeletons in the upper Zhangjiawa Member of the Lufeng Formation of Yunnan, People's Republic of China, China, dating to the Sinemurian stage of the Early Jurassic. The fossil find was composed of over twenty incomplete skeletons, including two skulls, it was excavated by Tsun Yi Wang. These remains were the basis for the species ''Y. huangi'' (the type species) and ''Y. robustus.'' In 2007, Lü Junchang and colleagues described an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seitaad
''Seitaad'' is a genus of sauropodomorph dinosaur which lived during the Early Jurassic period in what is now southern Utah, United States. ''Seitaad'' is known from an articulated partial postcranial holotype skeleton referred to as UMNH VP 18040. The skeleton is missing its head, neck and tail. It was collected from the Lower Jurassic Navajo Sandstone, the uppermost unit of the Glen Canyon Group, dating to the Pliensbachian stage, near Comb Ridge, San Juan County. A phylogenetic study of ''Seitaad'' found it to be a plateosaur sauropodomorph, placing it in Massospondylidae or alternatively (a less probable position) in Plateosauridae, but its placement within the Plateosauria is not well understood. In a cladistic analysis, presented by Apaldetti and colleagues in November 2011, ''Seitaad'' was found to be within Massopoda, just outside Anchisauria. ''Seitaad'' was first described by Joseph J. W. Sertich and Mark A. Loewen in 2010 and the type species is ''Seitaad ruessi''. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melanorosauridae
The Melanorosauridae were a family of sauropodomorph dinosaurs which lived during the Late Triassic and Early Jurassic. The name Melanorosauridae was first coined by Friedrich von Huene in 1929. Huene assigned several families of dinosaurs to the infraorder "Prosauropoda": the Anchisauridae, the Plateosauridae, the Thecodontosauridae, and the Melanorosauridae. Since then, these families have undergone numerous revisions. Galton and Upchurch (2004) considered '' Camelotia'', '' Lessemsaurus'', and '' Melanorosaurus'' members of the family Melanorosauridae. A more recent study by Yates (2007) indicates that the melanorosaurids were instead early sauropod Sauropoda (), whose members are known as sauropods (; from '' sauro-'' + '' -pod'', 'lizard-footed'), is a clade of saurischian ('lizard-hipped') dinosaurs. Sauropods had very long necks, long tails, small heads (relative to the rest of their b ...s. References * Galton, P.M & Upchurch, P. (2004). "Prosauropoda". In D. B. Wei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irisosaurus
''Irisosaurus'' (meaning "iridescent lizard" after the iridescent clouds of Yunnan Province, China) is an extinct genus of sauropodiform sauropodomorph dinosaur, from the Fengjiahe Formation of China. The type species, ''Irisosaurus yimenensis'' was formally described in 2020. It was the sister taxon to ''Mussaurus ''Mussaurus'' (meaning "mouse lizard") is a genus of herbivorous sauropodomorph dinosaur that lived in southern Argentina during the Sinemurian stage of the Early Jurassic. It receives its name from the small size of the skeletons of juvenile and ...''. Discovery and naming The holotype, CVEB 21901, was found in the rocks of the Fengjiahe Formation in Yimen County, Yunnan, during the summer of 2018. In 2020, it was assigned to the new genus and species, ''Irisosaurus yimenensis'', named after the county it was found and "the famous iridescent clouds of Yunnan Province" (; literally "south of colorful clouds", the likely origin of Yunnan's name). Description The ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Incertae Sedis
or is a term used for a taxonomy (biology), taxonomic group where its broader relationships are unknown or undefined. Alternatively, such groups are frequently referred to as "enigmatic taxa". In the system of open nomenclature, uncertainty at specific taxonomic levels is indicated by (of uncertain family), (of uncertain suborder), (of uncertain order) and similar terms. Examples * The fossil plant ''Paradinandra, Paradinandra suecica'' could not be assigned to any family, but was placed ''incertae sedis'' within the order Ericales when described in 2001. * The fossil ''Gluteus minimus (fossil), Gluteus minimus'', described in 1975, could not be assigned to any known animal phylum. The genus is therefore ''incertae sedis'' within the kingdom Animalia. * While it was unclear to which order the New World vultures (family Cathartidae) should be assigned, they were placed in Aves ''incertae sedis''. It was later agreed to place them in a separate order, Cathartiformes. * Boc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amygdalodon
''Amygdalodon'' (; "almond tooth" for its almond shaped teeth) was a genus of basal sauropod from the Middle Jurassic of Argentina. The type species is ''Amygdalodon patagonicus''. Fossils of ''Amygdalodon'' have been found in the Toarcian Cerro Carnerero Formation of the Jurassic (about 180-172 million years ago). Very little is known about it, but it is one of the few Jurassic dinosaurs from South America found thus far. Discovery The holotype (MLP 46-VIII-21-1) consists of some vertebrae, ribs, four complete and three partial teeth, and a partial pelvis and shoulder-blade, of which was discovered in 1936. The type species, ''Amygdalodon patagonicus'', was described by Cabrera in Argentina in 1947.A. Cabrera. 1947. Un saurópodo nuevo del Jurásico de Patagonia. Instituto del Museo de la Universidad Nacional de La Plata, ''Notas del Museo de La Plata, Paleontología'' 12(95):1–17 Until 1936 sauropod fossils from Argentina were completely unknown then, prompted by Piatnitzky ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
