|
Cimolodonta
Cimolodonta is a taxon of extinct mammals that lived from the Cretaceous to the Eocene. They were some of the more derived members of the extinct order Multituberculata. 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 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, 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, Boffiidae, Eucosmodontidae, Kogaionidae, Microcosmodontidae and the two genera ' ... [...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 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 mammals outside either of the two main groups of living mammals—Theria, including placentals and marsupials, and MonotremataAgustí-Antón 2002, pp 3-4—but usually as closer to Theria than to monotremes. They are considered to be clo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plagiaulacida
Plagiaulacida is a group of extinct multituberculate mammals. Multituberculates were among the most common mammals of the Mesozoic, "the age of the dinosaurs". Plagiaulacids are a paraphyletic grouping, containing all multituberculates that lie outside of the advanced group Cimolodonta. They ranged from the Middle Jurassic Period to the early Late Cretaceous of the northern hemisphere. During the Cenomanian, they were replaced by the more advanced cimolodontans. Kielan-Jaworowska and Hurum (2001) divides “Plagiaulacida” into three informal lineages, the paulchoffatiids, the plagiaulicids, and the allodontids. Allodontid line The Allodontid line may be a superfamily, Allodontoidea. Both allodontids and paulchoffatiids (below) were among the most basal of the plagiaulacids. The Allodontid line contains: The family Allodontidae is known from two genera from the Upper Jurassic Morrison Formation of North America. The family Zofiabaataridae contains a single genus, '' Zofia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kogaionidae
Kogaionidae is a family of fossil mammals within the extinct order Multituberculata. Representatives are known from the Upper Cretaceous and the Paleocene of Europe. Having started as island endemics on Hateg Island during the Upper Cretaceous, where they were in fact the dominant mammal group and diverged into rather unique ecological niches, they expanded across Europe in the Paleocene, where they briefly became a major component of its mammal fauna before their extinction.First mammal species identified from the Upper Cretaceous of the Rusca Montana Basin (Transylvania, Romania) Article in Comptes Rendus Palevol https://dx.doi.org/10.1016/j.crpv.2016.04.002 · June 2016 They are considered to be basal members of Cimolodonta. Classification This family is part of the suborder Cimolodonta, generally accepted as closely related to Taeniolabidoidea.Thierry Smith, Codrea Vlad, Red Iron-Pigmented Tooth Enamel in a Multituberculate Mammal from the Late Cretaceous Transylvanian " ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cimolomyidae
Cimolomyidae is a family of fossil mammal within the extinct order Multituberculata. Representatives are known from the Upper Cretaceous and the Paleocene of North America and perhaps Mongolia. The family is part of the suborder Cimolodonta. Other than that, their systematic relationships are hard to define. Some authors have placed the taxon within Taeniolabidoidea. Kielan-Jaworowska and Hurum (2001) expressly don't. The family Cimolomyidae was named by Othniel Charles Marsh in 1889. Notes References * Marsh (1889), "Discovery of Cretaceous Mammalia. Part II". ''Am. J. Sci.'' 3, 38, p. 81-92. * Kielan-Jaworowska Z & Hurum JH (2001), "Phylogeny and Systematics of multituberculate mammals". ''Paleontology'' 44'', p. 389-429. * Much of this information has been derived fro MESOZOIC MAMMALS: "basal" Cimolodonta, Cimolomyidae, Boffius, Boffiidae and Kogaionidae Kogaionidae is a family of fossil mammals within the extinct order Multituberculata. Representatives are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uzbekbaatar
''Uzbekbaatar'' is a genus of extinct mammal from the Upper Cretaceous of Uzbekistan. It was a member of the extinct order Multituberculata within the suborder Cimolodonta, though its further affinities are unclear. The genus was named by Kielan-Jaworowska Z. and Nesov L.A. in 1992 and means "Uzbek hero". The one species named by Kielan-Jaworowska and Nesov is ''Uzbekbaatar kizylkumensis'', found in the Upper Cretaceous strata of Uzbekistan. A second species was also apparently described by Averianov in 1999. References Further reading * Kielan-Jaworowska and Nesov (1992), "Multituberculate mammals from the Cretaceous of Uzbekistan", ''Acta Palaeontologica Polonica'' 37, p. 1-17. * Kielan-Jaworowska, Z. & Hurum, J.H. (2001), "Phylogeny and Systematics of multituberculate mammals", ''Paleontology'' 44, p. 389-429. * Much of this information has been derived fro Mesozoic Mammals: "basal" Cimolodonta, Cimolomyidae, Boffiidae and Kogaionidae Kogaionidae is a fam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viridomys
''Viridomys'' is a genus of extinct mammal from the Upper Cretaceous of North America. It was a member of the extinct order of Multituberculata, and lived during the Mesozoic, also known as the "age of the dinosaurs." It's within the suborder of Cimolodonta, though its further affinities are unclear. The primary species, ''Viridomys orbatus'', is known from fossils found in Campanian (Upper Cretaceous)-aged strata of the Upper Milk River Formation in Alberta, Canada. Possible remains have also been found in Dogie Mountain, Texas (United States). The Texas site is believed to be Paleocene in age. References * Fox (1971), "Early Campanian multituberculates (Mammalia: Allotheria) from the upper Milk River Formation, Alberta", ''Canadian Journal of Earth Sciences'' 8, p. 916-938. * Kielan-Jaworowska, Z. & Hurum, J.H. (2001), "Phylogeny and Systematics of multituberculate mammals", ''Paleontology'' 44, p. 389-429. * Much of this information has been derived froMesozoic Ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meniscoessus
''Meniscoessus'' is a genus of extinct mammal from the Upper Cretaceous Period of what is now North America. It was a member of the extinct order Multituberculata, lying within the suborder Cimolodonta and family Cimolomyidae. Taxonomy The genus ''Meniscoessus'' was named by Edward Drinker Cope in 1882. It has also been known under the following names: ''Cimolomys '' (partly); ''Dipriodon'' (Marsh 1889); ''Halodon'' (Marsh 1889); ''Oracodon'' (Marsh 1889); ''Moeniscoessus''; ''Selenacodon'' (Marsh 1889) (partly); and ''Tripriodon'' (Marsh 1889). The generic name has a complicated history. It is attributed to Cope, 1882. Later, this was joined by ''"Meniscoessus"'' (Marsh 1889). The second usage apparently related to teeth described as belonging to small carnivorous dinosaurs. These were further christened ''Dipriodon'', ''Tripriodon'' and others, including ''Triprotodon''. Close similarities were then noticed with an already established dinosaur genus, ''Paronychodon'' (Cope 18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boffius
''Boffius'' is a genus of mammal from the Paleocene of Europe, which was named by Vianey-Liaud M. in 1979. It is a member of the extinct order of Multituberculata. Boffius lies within the suborder Cimolodonta and is the only known member of the family Boffiidae (Hahn & Hahn, 1983). The species ''Boffius splendidus'' is known from the Lower Paleocene Hainin Formation found in Hainaut, Belgium. It was a relatively large multituberculate. References Further reading * Vianey-Liaud (1979), "Les Mammifères montiens de Hainin (Paléocene moyen de Belgique). Part I, Multituberculés". ''Palaeovertebrata'' 9, p. 117-131. * Kielan-Jaworowska Z & Hurum JH (2001), "Phylogeny and Systematics of multituberculate mammals". ''Paleontology'' 44, p. 389-429. * Much of this information has been derived froMESOZOIC MAMMALS; 'basal' Cimolodonta, Cimolomyidae, Boffiidae and Kogaionidae Kogaionidae is a family of fossil mammals within the extinct order Multituberculata. Represe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bryceomys
''Bryceomys'' is an extinct mammal that lived during the late Cretaceous period (between 100 and 66 million years ago) and thus shared the world with dinosaurs. It was a member of the also extinct order of Multituberculata. It was within the suborder of Cimolodonta, and a member of the Paracimexomys group. The genus ''Bryceomys'' ("Bryce mouse", after Bryce Canyon National Park) was named by Eaton J.G. in 1995. Species The species ''Bryceomys fumosus'' (Eaton 1995) is known from fossils found in strata dating to the Turonian (Upper Cretaceous) in the Straight Cliffs Formation of Utah, US. They probably weighed about 12g, about half the weight of a house mouse. About a hundred teeth are held at the Oklahoma Museum of Natural History, including the holotype. Species: ''Bryceomys hadrosus'' Eaton J.G. 1995 Place: Straight Cliffs Formation of Utah Age: Turonian (Upper Cretaceous) Also in the Oklahoma collection. Suggested bodyweight is around 90 g. Species: ''Bryceomys interme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corriebaatar
''Corriebaatar'' is the type and only genus of Corriebaataridae, a family of multituberculate mammals. It contains the single species ''Corriebaatar marywaltersae'' and represents the first evidence of Australian multituberculates Fossils found in the Wonthaggi Formation date back to the Aptian stage of the Early Cretaceous. Discovery The species ''Corriebaatar marywaltersae'' was discovered in 2009 based on the discovery of a well-preserved fourth premolar found in Victoria, Australia at the Flat Rocks fossil site. It was hypothesized to represented a cimolodontan multituberculate mammal as opposed to a new, unrecognized lineage. The 2009 specimen was the holotype A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of several ... and the only known remains of the species until a second specim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraphyly
In taxonomy, a group is paraphyletic if it consists of the group's last common ancestor and most of its descendants, excluding a few monophyletic subgroups. The group is said to be paraphyletic ''with respect to'' the excluded subgroups. In contrast, a monophyletic group (a clade) includes a common ancestor and ''all'' of its descendants. The terms are commonly used in phylogenetics (a subfield of biology) and in the tree model of historical linguistics. Paraphyletic groups are identified by a combination of synapomorphies and symplesiomorphies. If many subgroups are missing from the named group, it is said to be polyparaphyletic. The term was coined by Willi Hennig to apply to well-known taxa like Reptilia ( reptiles) which, as commonly named and traditionally defined, is paraphyletic with respect to mammals and birds. Reptilia contains the last common ancestor of reptiles and all descendants of that ancestor, including all extant reptiles as well as the extinct synapsids, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ptilodontoidea
Ptilodontoidea is a group of extinct mammals from the Northern Hemisphere. They were generally small, somewhat rodent-like creatures of the extinct order Multituberculata. Some of these genera boast a great many species, though remains are generally sparse. ''Ptilodus'' is among the best known, and there's a tendency to depict it as an analog of a squirrel. Upper Cretaceous remains are known from North America and Europe. Later representatives (Paleocene - Eocene) hail from North America, Europe and Asia. These were some of the last multituberculates, and they are within the suborder Cimolodonta. The superfamily is further divided into the following families: *Neoplagiaulacidae - 10 genera; * Ptilodontidae - 4 genera; *Cimolodontidae Cimolodontidae is a family of fossil mammals within the extinct order Multituberculata. Representatives are known from the Upper Cretaceous and Paleocene of North America. The family Cimolodontidae was named by Othniel Charles Marsh i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
