|
Spalacotheriidae
Spalacotheriidae is a family of extinct mammals belonging to the paraphyletic group 'Symmetrodonta'. They lasted from the Early Cretaceous to the Campanian in North America, Europe, Asia and North Africa. Spalacotheriids are characterised by having molar teeth with three molar cusps sitting at acute angles to one another.Martin, T., 2018. 6. Mesozoic mammals—early mammalian diversity and ecomorphological adaptations. In Mammalian evolution, diversity and systematics (pp. 199-300). De Gruyter. The shape of their teeth as well as their long lower jaw indicate a carnivorous/insectivorous diet. A sub-group of Spalacotheriidae, the spalacolestines, lack a Meckelian groove in the jaw, indicating that they had a modern ear anatomy. Genera * ''Akidolestes'' * '' Infernolestes'' * ''Spalacotherium'' * ''Symmetrolestes ''Symmetrolestes'' is an extinct genus of small spalacotheriid mammal from the Early Cretaceous period of Japan. The genus contains one species known as ''S. parv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Akidolestes
''Akidolestes'' is an extinct genus of mammals from the family Spalacotheriidae, spalacotheriid. Although Akidolestes do not have any modern relatives, they are early mammal, mammals related to Theria, therians (the subclass containing marsupials and placentals). They belong to a group of Theriiformes, theriiform mammals known as the Spalacotheriidae, Spalacotherioidea. However, unlike other members of this Taxonomic rank, superfamily, ''Akidolestes'' have a few prototherian features. The genus name, ''Akidolestes'', is derived from ''akido'', Greek for point, and ''lestes'', Greek for thief. Akido- refers to the pointed Rostrum (anatomy), snout and -lestes is a common suffix for fossil mammals. The specific epithet, ''cifelli'', is in honor of Richard L. Cifelli, a prominent researcher in prehistoric mammals. An ''Akidolestes'' fossil preserved with a complete post-cranium and a partial skull was discovered in the Yixian Formation of Liaoning, China. The holotype of ''Akidol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symmetrolestes
''Symmetrolestes'' is an extinct genus of small spalacotheriid mammal from the Early Cretaceous period of Japan. The genus contains one species known as ''S. parvus'', the type fossil (which is only fossil known) is from fluvial deposits located in the Dinosaur Quarry in the Kitadani Formation, near the city of Katsuyama which lies alongside valley of the Sugiyamagawa River. It was described by Tsubamoto and Rougier in 2004 keeping the Holotype at the National Science Museum, Tokyo, Japan. Description The type specimen (NSM PV 20562, holotype) is known from a fragmentary right jaw with the first incisor and five postcanine teeth preserved. ''Symmetrolestes'' is more derived than zhangheotheriids as it had acute−angled molariform teeth with completely developed shearing surfaces, taller crowns on it teeth and more complete cingulids. It differs from other spalacotheriids due to the fact it had fewer molariform teeth, a higher number of premolariform teeth and gradual tran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symmetrodonta
Symmetrodonta is a group of Mesozoic mammals and mammal-like synapsids characterized by the triangular aspect of the molars when viewed from above, and the absence of a well-developed talonid. The traditional group of 'symmetrodonts' ranges in age from the latest Triassic to the Late Cretaceous, but most research in the last 20-30 years has concluded that they are not a true taxonomic group, but include several unrelated branches of the mammal tree. Despite this, the name is still used informally by some researchers for convenience, usually restricted to the spalacotheriids and zhangheotheriids Martin, T., 2018. 6. Mesozoic mammals—early mammalian diversity and ecomorphological adaptations. In Mammalian evolution, diversity and systematics (pp. 199-300). De Gruyter.. There are some symmetrodonts with acutely-triangulated molar cusps (“acute-angled symmetrodonts”) that seem to form a true monophyletic group, and lasted from the Early Cretaceous to the Campanian, although Zha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spalacotherium
''Spalacotherium'' is a genus of extinct mammal from the Early Cretaceous of Europe. The type species ''Spalacotherium tricuspidens'' was originally named by Richard Owen in 1854, and its material includes maxillary and dentary fragments and many teeth from the Berriasian Lulworth Formation of southern England. Referred species include ''S. taylori'', ''S. evansae'' and ''S. hookeri'' also from the Lulworth deposits, and ''S. henkeli'' from Barremian deposits of Galve, Spain. The Lulworth taxon ''Peralestes longirostris'', named by Owen in 1871, is a junior synonym of the type species ''S. tricuspidens''. ''Spalacotherium'' is the namesake taxon of the family Spalacotheriidae, which is an extinct clade within Trechnotheria that may be closely related to the Gondwanan clade Meridiolestida, or united with the family Zhangheotheriidae to form Symmetrodonta.''S. evansae'' is also from the Berriasian aged Angeac-Charente bonebed The Angeac-Charente bonebed is a fossil deposit l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aliaga (mammal)
Aliaga or Aliağa or Aliagha may refer to: Places * Aliağa, a town and district of İzmir Province, Turkey * Aliağa, Tarsus, a village in Tarsus district of Mersin Province, Turkey * Aliaga, Aragon, a town in Spain * Aliaga, Nueva Ecija, a municipality on Luzon, the Philippines Given name * Aliagha Vahid (1895–1955), Azerbaijani poet Surname * Felipe Pardo y Aliaga (1806–1868), Peruvian poet, satirist, playwright, lawyer, and politician * Rafael López Aliaga, Peruvian politician and businessman Other uses * Aliağa (İZBAN), commuter rail station at Aliağa, İzmir in Turkey * Aliağa Petkim Aliağa Gençlik S.K., known as Aliağa Petkim for sponsorship reasons, was a professional basketball team from the district of Aliağa in İzmir, Turkey. Their home arena was the Enka Sport Hall with a capacity of 2,500 seats. The team competes p ..., professional basketball team in Aliağa, İzmir in Turkey * Aliağa Wind Farm, in the district * ''Aliaga'' (mammal)'', a foss ... [...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 Kerguelen P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
