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Sphenocondor
''Sphenocondor'' is an extinct genus of sphenodontian reptile from the Early Jurassic Cañadón Asfalto Formation of Argentina. Phylogeny A phylogenetic analysis performed by Apestiguia et al. (2012) resulted in the following tree which shows the relationship of ''Sphenocondor'' to other rhynchocephalia Rhynchocephalia (; ) is an order of lizard-like reptiles that includes only one living species, the tuatara (''Sphenodon punctatus'') of New Zealand. Despite its current lack of diversity, during the Mesozoic rhynchocephalians were a diverse g ...ns: References Prehistoric reptile genera Jurassic lepidosaurs Middle Jurassic reptiles of South America Cañadón Asfalto Formation Fossil taxa described in 2012 {{jurassic-reptile-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2012 In Paleontology
Note: In 2012, the International Code of Zoological Nomenclature was amended, with new regulations allowing the publication of new names and nomenclatural acts in zoology after 2011, in works "produced in an edition containing simultaneously obtainable copies by a method that assures (...) widely accessible electronic copies with fixed content and layout", provided that the work is registered in ZooBank before it is published, the work itself states the date of publication with evidence that registration has occurred, and the ZooBank registration states both the name of an electronic archive intended to preserve the work and the ISSN or ISBN associated with the work. New scientific names appearing in electronic works are not required to be registered in ZooBank, only the works themselves are. Works containing descriptions of some of the taxa listed below were not printed on paper in 2012; however, the taxa that were described in works which were registered in ZooBank in 2012 are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theretairus
''Theretairus'' is a Late Jurassic genus of sphenodont reptile from the Morrison Formation of western North America,Foster, J. (2007). "Table 2.1: Fossil Vertebrates of the Morrison Formation." ''Jurassic West: The Dinosaurs of the Morrison Formation and Their World''. Indiana University Press. pp. 58-59. present in stratigraphic zones 5 and 6.Foster, J. (2007). "Appendix." ''Jurassic West: The Dinosaurs of the Morrison Formation and Their World''. Indiana University Press. pp. 327-329. History and naming The holotype consists of a right mandible and several in-socket teeth from Quarry 9 at Como Bluff, Wyoming where it was excavated by paleontologist William Harlow Reed, who then was working for Othniel Charles Marsh, and it was deposited at the Yale Peabody Museum under YPM VP 13764. The locality comes from strata of the Brushy Basin Member of the Morrison Formation, which also bears other sphenodontians ''Opisthias'' and ''Eilenodon.''Rasmussen, T. E.; Callison, George (198 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cañadón Asfalto Formation
The Cañadón Asfalto Formation is a Lower Jurassic to Late Jurassic geologic formation, from the Jurassic period of the Mesozoic Era. Its age is controversial, uranium-lead dating of the volcanic tuff beds having given various different ages. A Recent work suggested that the base of the formation was formed around 171 Ma, during the upper Aalenian, while the main age for the Lower Las Chacritas Member being around 168 Ma, during the Bajocian, Bathonian and Callovian While the overlying Puesto Almada Member seems to be around 158 ma, or Oxfordian age, that changed thanks to the discovery of zircons near the location of discovery of '' Bagualia'', allowing a precise age of Las Charcitas Member as Middle-Late Toarcian, 178-179 million years, and a later study constrained the age of the formation as Middle Toarcian-Lower Bajocian, being contemporaneous to the Chon Aike volcanic activity, being a local equivalent to Antarctica's Mawson Formation. It is located in the Cañadón Asfa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhynchocephalia
Rhynchocephalia (; ) is an order of lizard-like reptiles that includes only one living species, the tuatara (''Sphenodon punctatus'') of New Zealand. Despite its current lack of diversity, during the Mesozoic rhynchocephalians were a diverse group including a wide array of morphologically distinct forms. The oldest record of the group is dated to the Middle Triassic around 238 to 240 million years ago, and they had achieved a worldwide distribution by the Early Jurassic. Most rhynchocephalians belong to the group Sphenodontia ('wedge-teeth'). Their closest living relatives are lizards and snakes in the order Squamata, with the two orders being grouped together in the superorder Lepidosauria. Many of the niches occupied by lizards today were held by sphenodontians during the Triassic and Jurassic, although lizard diversity began to overtake sphenodontian diversity in the Cretaceous, and they had disappeared almost entirely by the beginning of the Cenozoic. While the modern tuat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphenodon
Tuatara (''Sphenodon punctatus'') are reptiles endemic to New Zealand. Despite their close resemblance to lizards, they are part of a distinct lineage, the order Rhynchocephalia. The name ''tuatara'' is derived from the Māori language and means "peaks on the back". The single extant species of tuatara is the only surviving member of its order. Rhynchocephalians originated during the Triassic (~250 million years ago), reached worldwide distribution and peak diversity during the Jurassic and, with the exception of tuatara, were extinct by 60 million years ago. Their closest living relatives are squamates (lizards and snakes). For this reason, tuatara are of interest in the study of the evolution of lizards and snakes, and for the reconstruction of the appearance and habits of the earliest diapsids, a group of amniote tetrapods that also includes dinosaurs (including birds) and crocodilians. Tuatara are greenish brown and grey, and measure up to from head to tail-tip and wei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphenovipera
''Sphenovipera jimmysjoyi'' is an extinct species of sphenodontian dated from the Middle Jurassic. If was discovered in the lower part of the La Boca Formation located in Tamaulipas, Mexico. Only the lower jaw of this organism has been discovered and studied. It is possibly the only species of rhynchocephalian yet discovered to show evidence of venom delivery. Etymology ''Sphenovipera'' was named by Reynoso in 2005. The name alludes to sphenodontians via ''Spheno-'' and ''-vipera'' is Latin for "venomous snake." Venom delivery The mandible of ''Sphenovipera jimmysjoyi'' has several characteristics indicative of venom delivery. This includes large curved fangs with grooves seen in other animals that use low-pressure venom delivery, such as colubrid snakes Snakes are elongated, limbless, carnivorous reptiles of the suborder Serpentes . Like all other squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales. Many species of snakes have skulls ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homoeosaurus
''Homoeosaurus'' is an extinct genus of sphenodont reptile. It was found in limestone in Bavaria, Germany, as well as in France and the United Kingdom. It was related to the modern tuatara, though it was a considerably more gracile. There were several species varying greatly in size and morphology.G. A. Boulenger, (1891) On British Remains of ''Homœosaurus'', with Remarks on the Classification of the Rhynchocephalia Rhynchocephalia (; ) is an order of lizard-like reptiles that includes only one living species, the tuatara (''Sphenodon punctatus'') of New Zealand. Despite its current lack of diversity, during the Mesozoic rhynchocephalians were a diverse g .... Article in ''Journal of Zoology'' 59(1):167 - 172. DOI: 10.1111/j.1469-7998.1891.tb06820.x References Jurassic lepidosaurs Sphenodontia Solnhofen fauna Late Jurassic reptiles of Europe Prehistoric reptile genera {{jurassic-reptile-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zapatadon
''Zapatadon'' is an extinct genus of sphenodontid reptile from the end of the Early Jurassic in the lower part of La Boca Formation of Tamaulipas, Mexico.Marisol Montellano, James A. Hopson and James M. Clark (2008)Late Early Jurassic Mammaliaforms from Huizachal Canyon, Tamaulipas, México ''Journal of Vertebrate Paleontology'', Vol. 28, No. 4 (Dec. 12, 2008), pp. 1130-1143. Is known from a nearly complete skull with mandible of a post-hatchling individual (the specimen IGM 3497, in the Instituto de Geologia, of the Universidad Nacional Autónoma de Mexico), and is one of the smallest skulls between the sphenodontians, with an estimated total length of 11.3 millimetres, a bit smaller than the hatchling individuals observed in the modern tuatara (''Sphenodon''); features like the oblique mandibular symphysis suggests that the holotype is from an individual in a relatively mature stage of ontogenic development. ''Zapatadon'' is diagnosed by their hatchling tooth series located in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cynosphenodon
''Cynosphenodon'' ( ; "Dog Sphenodontian") is an extinct genus of the family Sphenodontidae from the Middle Jurassic La Boca Formation of Tamaulipas, Mexico. Growth patterns in the teeth of ''Cynosphenodon'' suggest its close relationship with the modern tuatara Tuatara (''Sphenodon punctatus'') are reptiles endemic to New Zealand. Despite their close resemblance to lizards, they are part of a distinct lineage, the order Rhynchocephalia. The name ''tuatara'' is derived from the Māori language and m ....Reynoso, V. H. (2003). Growth patterns and ontogenetic variation of the teeth and jaws of the Middle Jurassic sphenodontian ''Cynosphenodon huizachalensis'' (Reptilia: Rhynchocephalia). ''Canadian Journal of Earth Sciences 40''(4), 609–619 References Jurassic lepidosaurs Sphenodontia Fossils of Mexico Prehistoric reptile genera {{Jurassic-reptile-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toarcian
The Toarcian is, in the ICS' geologic timescale, an age and stage in the Early or Lower Jurassic. It spans the time between 182.7 Ma (million years ago) and 174.1 Ma. It follows the Pliensbachian and is followed by the Aalenian. The Toarcian Age began with the Toarcian turnover, the extinction event that sets its fossil faunas apart from the previous Pliensbachian age. It is believed to have ended with a global cooling event known as the Comptum Cooling Event, although whether it represented a worldwide event is controversial. Stratigraphic definitions The Toarcian takes its name from the city of Thouars, just south of Saumur in the Loire Valley of France. The stage was introduced by French palaeontologist Alcide d'Orbigny in 1842, after examining rock strata of this age in a quarry near Thouars. In Europe this period is represented by the upper part of the Lias. The base of the Toarcian is defined as the place in the stratigraphic record where the ammonite genus '' Eoda ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ankylosphenodon
''Ankylosphenodon'' is an extinct species of sphenodontian known from Tepexi de Rodriguez, Mexico. It is known from Early Cretaceous sedimentary deposits from the Tlayua formation. Lifestyle ''Ankylosphenodon'' is thought to have been an aquatic reptile due to its pachyostotic skeleton and other anatomical features often seen in aquatic animals. There is also evidence that its teeth were constantly growing throughout its lifetime, which may be indicative of herbivory, a rare characteristic among Lepidosauria The Lepidosauria (, from Greek meaning ''scaled lizards'') is a subclass or superorder of reptiles, containing the orders Squamata and Rhynchocephalia. Squamata includes snakes, lizards, and amphisbaenians. Squamata contains over 9,000 species .... References Sphenodontia Cretaceous reptiles of North America Prehistoric reptile genera {{Cretaceous-reptile-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kallimodon
''Kallimodon'' is a genus of sphenodont from the Late Jurassic of Bavaria, southern Germany. Systematics ''Kallimodon'' was originally described as a species of ''Homoeosaurus'' by Karl von Zittel in 1887. However, in 1963 it was renamed ''Kallimodon'' due to differences from the ''Homoeosaurus'' type species. In 1997, ''Kallimodon'' was sunk as a junior synonym of ''Leptosaurus ''Leptosaurus'' is a genus of sphenodont from the Late Jurassic of Bavaria, southern Germany. ''Kallimodon'', at times synonymized with ''Leptosaurus'', is actually a distinct genus more closely related to ''Sapheosaurus ''Sapheosaurus'' was ...'', with the type species referred to as ''L. pulchellus''. However, subsequent studies find ''Kallimodon'' to be valid and distinct from ''Leptosaurus'', being closely related to ''Sapheosaurus''. One specimen previously referred to this genus is actually a distinct taxon.Oliver W. M. Rauhut & Adriana López-Arbarello (2015) Zur Taxonomie der Brückenechse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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