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Djadochtatheriidae
Djadochtatheriidae is a family of fossil mammals within the extinct order Multituberculata. Remains are known from the Upper Cretaceous of Central Asia. These animals lived during the Mesozoic, also known as the "age of the dinosaurs". This family is part of the suborder of Cimolodonta. The taxon Djadochtatheriidae was named by Zofia Kielan-Jaworowska and Jørn Hurum in 1997. Multituberculates are a rather diverse group in terms of locomotion and diet. Forms like '' Kryptobaatar'' and ''Catopsbaatar'' were hopping, jerboa Jerboas () are the members of the family Dipodidae. They are hopping desert rodents found throughout North Africa and Asia. They tend to live in hot deserts. When chased, jerboas can run at up to . Some species are preyed on by little owls (''A ...-like omnivores (and this is probably the ancestral condition for the group, given that '' Nemegtbaatar'' also had this lifestyle), while '' Mangasbaatar'' was a robust, digging herbivore.Rougier et al, 2016 Note ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catopsbaatar
''Catopsbaatar'' is a genus of multituberculate, an extinct Order (biology), order of rodent-like mammals. It lived in what is now Mongolia during the late Campanian age of the Late Cretaceous epoch (geology), epoch, about 72 million years ago. The first fossils were collected in the early 1970s, and the animal was named as a new species of the genus ''Djadochtatherium'' in 1974, ''D. catopsaloides''. The Specific name (zoology), specific name refers to the animal's similarity to the genus ''Catopsalis''. The species was moved to the genus ''Catopsalis'' in 1979, and received its own genus (''Catopsbaatar'', Greek and Mongolian for 'visible hero') in 1994. Five skulls, one molar, and one skeleton with a skull are known; the last is the genus' most complete specimen. ''Catopsbaatar'' was a member of the family Djadochtatheriidae. The skull of ''Catopsbaatar'' was up to long and, as in other multituberculates, proportionally large. The external appearance of these animals' h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multituberculata
Multituberculata (commonly known as multituberculates, named for the multiple tubercles of their teeth) is an extinct Order (biology), order of rodent-like mammals with a fossil record spanning over 130 million years. They first appeared in the Middle Jurassic, and reached a peak diversity during the Late Cretaceous and Paleocene. They eventually declined from the mid-Paleocene onwards, disappearing from the known fossil record in the late Eocene. They are the most diverse order of Mesozoic mammals with more than 200 species known, ranging from mouse-sized to beaver-sized. These species occupied a diversity of ecological niches, ranging from burrow-dwelling to squirrel-like arborealism to jerboa-like hoppers. Multituberculates are usually placed as Crown group, crown mammals outside either of the two main groups of living mammals, Theria — placentals and marsupials — and Monotremata,Agustí-Antón 2002, pp 3-4 but usually as closer to Theria than to monotremes. They are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Djadochtatherium
''Djadochtatherium'' is a mammal genus that lived in Mongolia during the Upper Cretaceous. It coexisted with some of the late dinosaurs. This animal was a member of the extinct order of Multituberculata. It is within the suborder of Cimolodonta, and a member of the family Djadochtatheriidae Djadochtatheriidae is a family of fossil mammals within the extinct order Multituberculata. Remains are known from the Upper Cretaceous of Central Asia. These animals lived during the Mesozoic, also known as the "age of the dinosaurs". This famil .... It was named by G. G. Simpson in 1925, the name meaning "Djadokhta beast". The species ''Djadochtatherium matthewi'' was also named by G. G. Simpson in 1925 and has also been known as ''Catopsalis matthewi'' (Simpson, 1925). It has been found in the Campanian (Upper Cretaceous)-age Djadokhta and Goyot Formations of Mongolia. This was a relatively large Multituberculate, with a skull length of about 4.5 cm. It was originally dia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tombaatar
''Tombaatar'' is a mammal genus that existed during the Mongolian Upper Cretaceous period. It co-existed with some of the late dinosaurs. This animal was a member of the extinct order Multituberculata, within the suborder Cimolodonta and family Djadochtatheriidae. The genus ''Tombaatar'' was named by Rougier G.W., Novacek M. and Dashzeveg D. in 1997. The species ''Tombaatar sabuli'' is known from remains found in the Upper Cretaceous Djadokhta Formation of Ukhaa Tolgod, Mongolia. ''Tombaatar'' was a relatively large multituberculate. The skull The skull, or cranium, is typically a bony enclosure around the brain of a vertebrate. In some fish, and amphibians, the skull is of cartilage. The skull is at the head end of the vertebrate. In the human, the skull comprises two prominent ... is about 6 cm in length. References * Rougier, Novacek & Dashzeveg (1997), "A new multituberculate from the late Cretaceous locality Ukhaa Tolgod, Mongolia: Considerations on multitub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cimolodonta
Cimolodonta is a clade of Multituberculata, multituberculate mammals that lived from the Cretaceous to the Eocene. They probably lived something of a rodent-like existence until their ecological niche was assumed by true rodents. The more basal multituberculates are found in a different suborder, "Plagiaulacida", a Paraphyly, paraphyletic group containing all non cimolodontan multituberculates. Cimolodonta is apparently a natural (monophyletic) suborder. Remains have been identified from across the Northern Hemisphere. They first appeared during the Aptian extinction, Aptian, and completely replaced the more primitive plagiaulacidans by the early Late Cretaceous. The taxon is recognized as the informal Paracimexomys group and the superfamilies Djadochtatherioidea, Taeniolabidoidea, and Ptilodontoidea. Additionally, and of uncertain affinities, are the families Cimolomyidae, Boffius, Boffiidae, Eucosmodontidae, Kogaionidae, Microcosmodontidae and the two genera ''Uzbekbaatar'' and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kryptobaatar
''Kryptobaatar'', also known as ''Gobibaatar'' or ''Tugrigbaatar'', is an extinct mammalian genus dating from the Upper Cretaceous Period and identified in Central Asia. This animal was a member of the extinct order of Multituberculata within the suborder Cimolodonta, and was a member of the family Djadochtatheriidae. It lived contemporaneously with some of the dinosaurs. Its skull had a length of perhaps 3 cm. The generic name ''Kryptobaatar'' is derived from Greek : ''kruptós'', "hidden," (alludes to the ventral position of infraorbital foramen) and Mongolian : ''baatar'', "hero" (alludes to the name of the capital of Mongolia, Ulan Baatar). The specific name ''dashzevegi'' is named in honour of Mongolian palaeontologist Demberelyin Dashzeveg. The derivation of its synonym ''Gobibaatar parvus'' is Gobi (occurring in the Gobi Desert, Mongolia) and baatar ("a hero", the same as ''Kryptobaatar''). Another synonym ''Tugrigbaatar saichanensis'' is a generic name derived from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesozoic
The Mesozoic Era is the Era (geology), era of Earth's Geologic time scale, geological history, lasting from about , comprising the Triassic, Jurassic and Cretaceous Period (geology), Periods. It is characterized by the dominance of archosaurian reptiles such as the dinosaurs, and of Gymnosperm, gymnosperms such as cycads, ginkgoaceae and Araucariaceae, araucarian conifers; a hot Greenhouse and icehouse earth, greenhouse climate; and the tectonic break-up of Pangaea. The Mesozoic is the middle of the three eras since Cambrian explosion, complex life evolved: the Paleozoic, the Mesozoic, and the Cenozoic. The era began in the wake of the Permian–Triassic extinction event, the largest mass extinction in Earth's history, and ended with the Cretaceous–Paleogene extinction event, another mass extinction whose victims included the non-avian dinosaurs, Pterosaur, pterosaurs, Mosasaur, mosasaurs, and Plesiosaur, plesiosaurs. The Mesozoic was a time of significant tectonic, climatic, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Cretaceous First Appearances
Late or LATE may refer to: Everyday usage * Tardy, or late, not being on time * Late (or the late) may refer to a person who is dead Music * ''Late'' (The 77s album), 2000 * Late (Alvin Batiste album), 1993 * Late!, a pseudonym used by Dave Grohl on his '' Pocketwatch'' album * Late (rapper), an underground rapper from Wolverhampton * "Late", a song by Kanye West from ''Late Registration'' Other uses * Late (Tonga), an uninhabited volcanic island southwest of Vavau in the kingdom of Tonga * "Late" (''The Handmaid's Tale''), a television episode * LaTe, Oy Laivateollisuus Ab, a defunct shipbuilding company * Limbic-predominant age-related TDP-43 encephalopathy, a proposed form of dementia * Local-authority trading enterprise, a New Zealand business law * Local average treatment effect, a concept in econometrics * Late, a synonym for ''cooler'' in stellar classification See also * * * ''Lates'', a genus of fish in the lates perch family * Later (other) Later may refe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nemegtbaatar
''Nemegtbaatar'' is an extinct genus of mammal from the Upper Cretaceous Period of what is now Central Asia. It belonged to the order Multituberculata. ''Nemegtbaatar'' is within the suborder Cimolodonta and is a member of the superfamily Djadochtatherioidea. The genus ''Nemegtbaatar'' (Kielan-Jaworowska, 1974) was named after the Nemegt Valley and Ulan Bator, the capital of Mongolia. The type species is ''Nemegtbaatar gobiensis.'' It was discovered in Campanian aged strata of the Barun Goyot Formation in the Gobi Desert of Mongolia. Fossils of this species have been found in rocks dated from 76 to 71 million years ago, correlating to the Campanian and early Maastrichtian ages. With several intact skulls having been found, it can be determined that ''N.gobiensis'' has a dental formula of with a "roughly triangular" snout. ''Nemegtbaatar'' is possibly derived from a '' Bulganbaatar'' ancestor, based on a comparison of their dentition. ''Nemegtbaatar'' was a relatively la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jerboa
Jerboas () are the members of the family Dipodidae. They are hopping desert rodents found throughout North Africa and Asia. They tend to live in hot deserts. When chased, jerboas can run at up to . Some species are preyed on by little owls (''Athene noctua'') in central Asia. Most species of jerboas have excellent hearing that they use to avoid becoming the prey of nocturnal predators. The typical lifespan of a jerboa is around 2–3 years. Taxonomy Jerboas, as previously defined, were thought to be paraphyletic, with the jumping mice (Zapodidae) and birch mice (Sminthidae) also being classified in the family Dipodidae. However, phylogenetic analysis split all three as distinct families, leaving just the jerboas in Dipodidae and revealing them to be a monophyletic group. This animal has a body length (including the head) of between , with an additional of tail, which is always longer than the full body. Jerboa dental records reveal a slow increase in crown heights, which cor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxon
In biology, a taxon (back-formation from ''taxonomy''; : taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion, especially in the context of rank-based (" Linnaean") nomenclature (much less so under phylogenetic nomenclature). If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were presumably set forth in prehistoric times by hunter-gatherers, as suggested by the fairly sophisticated folk taxonomies. Much later, Aristotle, and later st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suborder
Order () is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between family and class. In biological classification, the order is a taxonomic rank used in the classification of organisms and recognized by the nomenclature codes. An immediately higher rank, superorder, is sometimes added directly above order, with suborder directly beneath order. An order can also be defined as a group of related families. What does and does not belong to each order is determined by a taxonomist, as is whether a particular order should be recognized at all. Often there is no exact agreement, with different taxonomists each taking a different position. There are no hard rules that a taxonomist needs to follow in describing or recognizing an order. Some taxa are accepted almost universally, while others are recognized only rarely. The name of an order is usually written with a capital letter. For some groups of organisms, their orders may follow consistent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
