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Shirerpeton
''Shirerpeton'' is an extinct genus of albanerpetontid amphibian from the Early Cretaceous Kuwajima Formation, which is located in Japan.Fujita, M. (2003). "Geological age and correlation of the vertebrate-bearing horizons in the Tetori Group". ''Memoir of the Fukui Prefectural Dinosaur Museum The , located in Katsuyama, Fukui, Japan, is one of the leading dinosaur museums in Asia that is renowned for its exhibits of fossil specimens of dinosaurs and paleontological research. It is sited in the Nagaoyama Park ( Katsuyama Dinosaur For ...''. 2: 3–14. The type species is ''Shirerpeton isajii'', which was described by Masumoto & Evans in 2018. ''Shirerpeton'' represents the first record of Albanerpetontidae in East Asia and the holotype is SBEI 2459, a small block bearing most of a disarticulated but associated skull with some postcranial elements present as well. Phylogeny From Daza ''et al'' (2020): References {{Taxonbar, from=Q49000628 Albanerpetontidae Fossi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albanerpetontidae
The Albanerpetontidae are an extinct family of small amphibians, native to the Northern Hemisphere during the Mesozoic and Cenozoic. The only members of the order Allocaudata, they are thought to be allied with living amphibians belonging to Lissamphibia. Despite a superficially salamander-like bodyform, their anatomy is strongly divergent from modern amphibians in numerous aspects. The fossil record of albanerpetontids spans over 160 million years from the Middle Jurassic to the beginning of the Pleistocene, about 2.13-2 million years ago. History of Research The earliest specimen of an albanerpetontid to be discovered was that of ''Celtedens, Celtedens megacephalus'' from the Early Cretaceous (Albian) Pietraroja Plattenkalk of Italy, described by Oronzio Gabriele Costa in 1864, and originally placed in the genus ''Triton,'' a junior synonym of the salamander genus ''Triturus''. Jaw elements of albanerpetontids from the Cretaceous of North America were assigned to the salamande ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albanerpeton
''Albanerpeton'' is an extinct genus of salamander-like lissamphibian found in North America and Europe, first appearing in Cretaceous-aged strata. There are eight described members of the genus, and one undiagnosed species from the Paskapoo Formation, with the most recent, ''A. ektopistikon'' being described by Carrano ''et al.''in 2022. Members of the genus had a robust head and neck which likely allowed them to actively burrow, characteristic of fossorial species, and they lived in a wide range of environments. This genus of amphibian was the last of its order, surviving until the late Pliocene in southern Europe, and into the Early Pleistocene (Gelasian) of northern Italy. It likely became extinct when the region developed its present Mediterranean-type climate, having preferred one that was cold and humid. The monophyly of ''Albanerpeton'' has recently been questioned History and Discovery Albanerpeton was first described by Estes and Hoffstetter in 1976. However, the ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yaksha Perettii
''Yaksha perettii'' is an extinct species of albanerpetontid amphibian, and the only species in the genus ''Yaksha''. It is known from three specimens found in Cenomanian aged Burmese amber from Myanmar. The remains of ''Yaksha perettii'' are the best preserved of all albanerpetontids, which usually consist of isolated fragments or crushed flat, and have provided significant insights in the morphology and lifestyle of the group. Etymology The generic epithet is named after the Yaksha, a class of nature and guardian spirits in Indian religions, while the specific epithet honors Dr. Adolf Peretti, who provided some of the specimens, including the holotype. Discovery The paratype specimen was originally described in 2016 amongst a collection of fossil lizard species from Burmese amber, and was initially identified as a stem-chameleon. However Professor Susan E. Evans, a researcher who has extensively worked on albanerpetontids, recognised the specimen as belonging to the grou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kuwajima Formation
The Kuwajima Formation is an Early Cretaceous geologic formation in Japan. Its precise age is uncertain due to a lack of identifying fossils, and it was previously considered likely Valanginian to Hauterivian in age. However, it is now considered to probably be Barremian in age. Dinosaurs and other vertebrates has been recovered from the Kaseki-kabe "Fossil-bluff" locality in the uppermost part of the formation. The multituberculate mammals ''Hakusanobaatar matsuoi'' and '' Tedoribaatar reini'' are known from the Kuwajima Formation. A member of Tritylodontidae, '' Montirictus kuwajimaensis'', has also been recovered from the unit.Hiroshige Matsuoka, Nao Kusuhashi and Ian J. Corfe (2016). "A new Early Cretaceous tritylodontid (Synapsida, Cynodontia, Mammaliamorpha) from the Kuwajima Formation (Tetori Group) of central Japan". Journal of Vertebrate Paleontology. Online edition: Vertebrate Paleobiota Fish Amphibians Choristoderes Squamates Dinosaurs Mammaliam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anoualerpeton
''Anoualerpeton'' is an extinct genus of lissamphibian in the family Albanerpetontidae. It is the oldest and most primitive albanerpetontid known. Fossils have been found of two different species, ''Anoualerpeton priscus'' from the Middle Jurassic (Bathonian) aged Forest Marble and Kilmaluag formations of England and Scotland, and ''Anoualerpeton unicus'' from Late Jurassic-Early Cretaceous (Tithonian-Berriasian) Ksar Metlili Formation of Morocco. ''A. unicus'' is the only named albanerpetontid from Gondwana. Etymology The name "''Anoualerpeton''" is composed of Anoual, the name of a city in the eastern High Atlas (Morocco), in whose relative proximity the type material of the type species ''Anoualerpeton unicus'' was found, and the ancient Greek word ἑρπετόν herpeton, which means 'creeping animal" and is often used in the generic names of fossil amphibians. The epithets "priscus" and "unicus" mean 'old' and 'unique', which refers to the fact that ''Anoualerpeton'' ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Celtedens
''Celtedens'' is an extinct genus of albanerpetontid amphibian from the Early Cretaceous of England, Spain, Sweden and Italy, and the Late Jurassic of Portugal. Taxonomy * †''Celtedens ibericus'' McGowan and Evans 1995 La Huérguina Formation, Spain, Barremian * †''Celtedens megacephalus'' Costa 1864 Lulworth Formation, United Kingdom, Berriasian Pietraroja Plattenkalk, Italy, Albian * Indeterminate remains attributed to the genus are also known from the Late Jurassic Alcobaça Formation The Alcobaça Formation, previously known as the Guimarota Formation and also known as the Consolação Unit, is a geological formation in Portugal. It dates back to the Kimmeridgian stage of the Late Jurassic. It is an important source of informa ... of Portugal, as well as the earliest Cretaceous (Berriasian) of Sweden. Phylogeny From Daza et al. 2020. References Albanerpetontidae Prehistoric amphibian genera Cretaceous amphibians of Europe Jurassic amphibians of Europ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Cretaceous
The Early Cretaceous (geochronological name) or the Lower Cretaceous ( chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 145 Ma to 100.5 Ma. Geology Proposals for the exact age of the Barremian-Aptian boundary ranged from 126 to 117 Ma until recently (as of 2019), but based on drillholes in Svalbard the defining early Aptian Oceanic Anoxic Event 1a (OAE1a) was carbon isotope dated to 123.1±0.3 Ma, limiting the possible range for the boundary to c. 122–121 Ma. There is a possible link between this anoxic event and a series of Early Cretaceous large igneous provinces (LIP). The Ontong Java- Manihiki- Hikurangi large igneous province, emplaced in the South Pacific at c. 120 Ma, is by far the largest LIP in Earth's history. The Ontong Java Plateau today covers an area of 1,860,000 km2. In the Indian Ocean another LIP began to form at c. 120 Ma, the Kergue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. '' Panthera leo'' (lion) and '' Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibian
Amphibians are four-limbed and ectothermic vertebrates of the class Amphibia. All living amphibians belong to the group Lissamphibia. They inhabit a wide variety of habitats, with most species living within terrestrial, fossorial, arboreal or freshwater aquatic ecosystems. Thus amphibians typically start out as larvae living in water, but some species have developed behavioural adaptations to bypass this. The young generally undergo metamorphosis from larva with gills to an adult air-breathing form with lungs. Amphibians use their skin as a secondary respiratory surface and some small terrestrial salamanders and frogs lack lungs and rely entirely on their skin. They are superficially similar to reptiles like lizards but, along with mammals and birds, reptiles are amniotes and do not require water bodies in which to breed. With their complex reproductive needs and permeable skins, amphibians are often ecological indicators; in recent decades there has been a dramat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north toward the East China Sea, Philippine Sea, and Taiwan in the south. Japan is a part of the Ring of Fire, and spans an archipelago of 6852 islands covering ; the five main islands are Hokkaido, Honshu (the "mainland"), Shikoku, Kyushu, and Okinawa. Tokyo is the nation's capital and largest city, followed by Yokohama, Osaka, Nagoya, Sapporo, Fukuoka, Kobe, and Kyoto. Japan is the eleventh most populous country in the world, as well as one of the most densely populated and urbanized. About three-fourths of the country's terrain is mountainous, concentrating its population of 123.2 million on narrow coastal plains. Japan is divided into 47 administrative prefectures and eight traditional regions. The Greater Tokyo Ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetori Group
The Tetori Group is a stratigraphic group in Japan, found within several basins in and around Fukui Prefecture. It is Early Cretaceous in age. It primarily consists of freshwater continental deposits, with some beds of volcanic tuffite. It primarily overlies Jurassic marine sediments or gneiss basement A basement or cellar is one or more Storey, floors of a building that are completely or partly below the storey, ground floor. It generally is used as a utility space for a building, where such items as the Furnace (house heating), furnace, .... Some of the units within the group are noted for their fossil content, including dinosaurs, lizards mammals and other vertebrates. Stratigraphy The term "Tetori Group" was first used by Oishi in 1933. A significant revision was made by Maeda in 1961 which subdivided the Group into three subgroups, which in ascending order are the Kuzuryu Subgroup, the Itoshiro Subgroup and the Akaiwa Subgroup, alongside the Omichidani and Asuwa Fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fukui Prefectural Dinosaur Museum
The , located in Katsuyama, Fukui, Japan, is one of the leading dinosaur museums in Asia that is renowned for its exhibits of fossil specimens of dinosaurs and paleontological research. It is sited in the Nagaoyama Park ( Katsuyama Dinosaur Forest Park) near the Kitadani Dinosaur Quarry that the Lower Cretaceous Kitadani Formation of the Tetori Group is cropped out and a large number of dinosaur remains including ''Fukuiraptor kitadaniensis'' and ''Fukuisaurus tetoriensis'' are found and excavated. Since October 2009, the entire area of Katsuyama City has been recognized as a Japanese Geopark "". Since July 2014, the guide tour to the field station next to the excavation site has been available from the end of April to early November. Dozens of fossil specimens of five named dinosaurs and their excavation site have been designated as a Natural Monument of Japan since February 2017. The Asia Dinosaur Association Secretary Office has been housed inside the museum since its est ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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