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Dicraeosauridae
Dicraeosauridae is a Family (biology), family of Diplodocoidea, diplodocoid sauropods who are the sister group to Diplodocidae. Dicraeosaurids are a part of the Flagellicaudata, along with Diplodocidae. Dicraeosauridae includes genera such as ''Amargasaurus'', ''Suuwassea'', ''Dicraeosaurus'', and ''Brachytrachelopan''. Specimens of this family have been found in North America, Asia, Africa, and South America. In 2023, a dicraeosaurid fossil was discovered in India for the first time. Their temporal range is from the Early Jurassic, Early or Middle Jurassic to the Early Cretaceous. Few dicraeosaurids survived into the Cretaceous, the youngest of which was ''Amargasaurus''. The group was first described by German paleontologist Werner Janensch in 1914 with the discovery of ''Dicraeosaurus'' in Tanzania. Dicraeosauridae are distinct from other sauropods because of their relatively short neck size and small body size. The clade is monophyletic and well-supported phylogenetically wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dicraeosauridae Scale
Dicraeosauridae is a family of diplodocoid sauropods who are the sister group to Diplodocidae. Dicraeosaurids are a part of the Flagellicaudata, along with Diplodocidae. Dicraeosauridae includes genera such as ''Amargasaurus'', ''Suuwassea'', ''Dicraeosaurus'', and '' Brachytrachelopan''. Specimens of this family have been found in North America, Asia, Africa, and South America. In 2023, a dicraeosaurid fossil was discovered in India for the first time. Their temporal range is from the Early or Middle Jurassic to the Early Cretaceous. Few dicraeosaurids survived into the Cretaceous, the youngest of which was ''Amargasaurus''. The group was first described by German paleontologist Werner Janensch in 1914 with the discovery of ''Dicraeosaurus'' in Tanzania. Dicraeosauridae are distinct from other sauropods because of their relatively short neck size and small body size. The clade is monophyletic and well-supported phylogenetically with thirteen unambiguous synapomorphies uniting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amargasaurus
''Amargasaurus'' (; "La Amarga lizard") is a genus of sauropod dinosaur from the Early Cretaceous epoch (geology), epoch (129.4–122.46 Mya (unit), mya) of what is now Argentina. The only known skeleton was discovered in 1984 and is virtually complete, including a fragmentary skull, making ''Amargasaurus'' one of the best-known sauropods of its epoch. ''Amargasaurus'' was first species description, described in 1991 and contains a single known species, ''Amargasaurus cazaui''. It was a large animal, but small for a sauropod, reaching in length. Most distinctively, it sported two parallel rows of tall spines down its neck and back, taller than in any other known sauropod. In life, these spines could have stuck out of the body as solitary structures that supported a keratinous sheath. An alternate hypothesis, now more favored, postulates that they could have formed a scaffold supporting a Neural spine sail, skin sail. They might have been used for display, combat, or defense. ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bajadasaurus
''Bajadasaurus'' is a genus of sauropod dinosaur from the Early Cretaceous epoch (geology), epoch (Berriasian, late Berriasian to Valanginian stage (geology), stages, between 145 and 132.9 mya (unit), million years ago) of northern Patagonia, Argentina. It was first described in 2019 in paleontology, 2019 based on a single specimen found in 2010 that includes a largely complete skull and parts of the neck. The only species is ''Bajadasaurus pronuspinax''. The genus is classified as a member of the Dicraeosauridae, a group of relatively small and short-necked sauropods. ''Bajadasaurus'' sported wikt:bifurcation, bifurcated (two-pronged), extremely elongated extending from the neck. Similarly elongated spines are known from the closely related and more completely known ''Amargasaurus''. Several possible functions have been proposed for these spines in ''Amargasaurus''; the 2019 description of ''Bajadasaurus'' suggested they could have served as a passive defense against predators i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amargatitanis
''Amargatitanis'' (meaning "La Amarga Formation, Amarga giant") is a genus of dicraeosaurid sauropod dinosaur (a type of large, long-necked quadrupedal herbivore, herbivorous dinosaur) from the Barremian-age (Lower Cretaceous) La Amarga Formation of Neuquén, Argentina. It is known from a single, incomplete postcranial skeleton consisting of a partial hindlimb, ischium, and two Vertebra, vertebrae. These remains were unearthed by Argentine paleontologist José Bonaparte in 1983 during an expedition by the Bernardino Rivadavia Natural Sciences Argentine Museum, Museo Argentino de Ciencias Naturales and later described as a new genus and species, ''Amargatitanis macni'' by Sebastián Apesteguía. The genus name comes from the words Amarga, where the fossils were collected, and ''titanis'' meaning "titan". Its species name is in reference to the MACN (Museo Argentino de Ciencias Naturales ), where the remains are stored. Though initially thought to be a Titanosauria, titanosaur, re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brachytrachelopan
''Brachytrachelopan'' is a short-necked sauropod dinosaur from the Late Jurassic ( Oxfordian to Tithonian) of Argentina. The holotype and only known specimen ( Museo Paleontológico Egidio Feruglio MPEF-PV 1716) was collected from an erosional exposure of fluvial sandstone within the Cañadón Calcáreo Formation on a hill approximately north-northeast of Cerro Cóndor, Chubut Province, in west-central Argentina, South America. Though very incomplete, the skeletal elements recovered were found in articulation and include eight cervical, twelve dorsal, and three sacral vertebrae, as well as proximal portions of the posterior cervical ribs and all the dorsal ribs, the distal end of the left femur, the proximal end of the left tibia, and the right ilium. Much of the specimen was probably lost to erosion many years before its discovery. The type species is ''Brachytrachelopan mesai''. The specific name honours Daniel Mesa, a local shepherd who discovered the specimen while searching ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brachytrachelopan Mesai
''Brachytrachelopan'' is a short-necked sauropod dinosaur from the Late Jurassic (Oxfordian (stage), Oxfordian to Tithonian) of Argentina. The holotype and only known specimen (Museo Paleontológico Egidio Feruglio MPEF-PV 1716) was collected from an erosional exposure of fluvial sandstone within the Cañadón Calcáreo Formation on a hill approximately north-northeast of Cerro Cóndor, Chubut Province, in west-central Argentina, South America. Though very incomplete, the skeletal elements recovered were found in articulation and include eight cervical vertebrae, cervical, twelve Dorsum (biology), dorsal, and three sacral vertebrae, as well as Anatomical terms of location#Proximal and distal, proximal portions of the posterior cervical ribs and all the dorsal ribs, the Anatomical terms of location#Proximal and distal, distal end of the left femur, the proximal end of the left tibia, and the right ilium (bone), ilium. Much of the specimen was probably lost to erosion many years bef ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suuwassea Emilieae
''Suuwassea'' is a genus of dicraeosaurid sauropod dinosaur found in the Upper Jurassic strata of the Morrison Formation, located in southern Carbon County, Montana, United States. The fossil remains were recovered in a series of expeditions during a period spanning the years 1999 and 2000 and were described by J.D. Harris and Peter Dodson in 2004. They consist of a disarticulated but associated partial skeleton, including partial vertebral series and limb bones. Etymology Since the fossil was found in an ancestral territory of the Native American Crow tribe, the etymology of the generic name is derived from a term in their language, ''suuwassa'', “the first thunder heard in spring”. The root ''suu'', meaning “thunder” and ''wassa'', “ancient”, are a nod to the “thunder lizard” moniker often applied to sauropods. The specific descriptor honours the deceased sponsor of the expeditions that recovered the fossil, Emilie deHellebranth (1914–2001). Description ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suuwassea
''Suuwassea'' is a genus of Dicraeosauridae, dicraeosaurid sauropod dinosaur found in the Upper Jurassic strata of the Morrison Formation, located in southern Carbon County, Montana, Carbon County, Montana, United States. The fossil remains were recovered in a series of expeditions during a period spanning the years 1999 and 2000 and were described by J.D. Harris and Peter Dodson in 2004. They consist of a disarticulated but associated partial skeleton, including partial vertebral series and limb bones. Etymology Since the fossil was found in an ancestral territory of the Native Americans in the United States, Native American Crow Nation, Crow tribe, the etymology of the generic name is derived from a term in Crow language, their language, ''suuwassa'', “the first thunder heard in spring”. The root ''suu'', meaning “thunder” and ''wassa'', “ancient”, are a nod to the “thunder lizard” moniker often applied to sauropods. The specific descriptor honours the deceased ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pilmatueia
''Pilmatueia'' is a genus of diplodocoid sauropods belonging to the family Dicraeosauridae that lived during the Early Cretaceous in what is now Argentina. Its type and only species is ''Pilmatueia faundezi''. ''Pilmatueia'' was probably closely related to other South American dicraeosaurids such as ''Amargasaurus''. Like other dicraeosaurids, ''Pilmatueia'' was relatively small for a sauropod. The vertebrae of ''Pilmatueia'' were more extensively hollowed out by air sacs than in other dicraeosaurids, which otherwise were characterized by a reduction in the air sac system compared to other sauropods. ''Pilmatueia'' dates to the Valanginian, an age of the Cretaceous period for which dinosaur faunas are poorly known. Discovery and naming Fossils of ''Pilmatueia faundezi'' were discovered in Neuquén Province, Argentina, at a site called Pilmatué. Fossil excavations at Pilmatué began in 2009, and the discovery of dicraeosaurid remains at Pilmatué was first announced in 2012, at a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dicraeosaurus
''Dicraeosaurus'' (Gr. , ' "bifurcated, double-headed" + Gr. , ' "lizard") is a genus of diplodocoid sauropod dinosaur that lived in what is now Lindi Region, Tanzania during the late Jurassic period. The genus was named for the neural spines on the back of its neck. The first fossil was described by paleontologist Werner Janensch in 1914. Description Unlike most diplodocoids, ''Dicraeosaurus'' had a comparatively large head with a relatively short and wide neck. The neck contained 12 unusually short vertebral column, vertebrae, likely indicating a low-level browser of vegetation no more than off the ground. ''Dicraeosaurus'' also lacked the "whiplash" tail tip typical of diplodocoids. It was smaller than many other diplodocoids, at only in length and , though this still makes it among the larger known members of the family Dicraeosauridae. The genus is notable for the rather tall neural spines protruding from its vertebrae, which it is named for. They were not straight as in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smitanosaurus
''Smitanosaurus'' (meaning "smith lizard") is a genus of dicraeosaurid sauropod dinosaur from the Late Jurassic of Colorado. The genus contains one species, ''S. agilis'', originally assigned to the defunct genus '' Morosaurus''. History The species ''Morosaurus agilis'' was originally named by Othniel Charles Marsh in 1889 for a partial skull, proatlases, and three cervical vertebrae found in 1883 in the Morrison Formation of Colorado. However, the genus ''Morosaurus'' was in 1907 reinterpreted as a junior synonym of ''Camarasaurus'', and most of the species assigned to the former genus were reassigned to the latter. ''M. agilis'', on the other hand, was left defunct without a proper generic assignment. O. P. Hay. 1930.'' Second Bibliography and Catalogue of the Fossil Vertebrata of North America'' 390(II):1-1074 Over time comparisons have been drawn with ''Haplocanthosaurus'', ''Diplodocus'' and brachiosaurids, but never with a phylogenetic analysis. Further preparation and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
