EutheriaEutheria (from Ancient Greek εὐ- (eú-), meaning "true, well", and θηρίον (thēríon), meaning "beast", and thus, "true beasts"), also called Pan-Placentalia, is the clade consisting of placental mammals and all therian mammals that are more closely related to placentals than to marsupials. Placentalia is the only surviving taxon of eutherians, and Eutheria is often used as a synonym of Placentalia in zoological contexts.
TheriaTheria ( or ; from Ancient Greek, thēríon'wild beast') is a subclass of mammals amongst the Theriiformes. Theria contains the eutherians (which includes placental mammals) and the metatherians (which includes marsupials) but excludes the egg-laying monotremes and various extinct mammals evolving prior to the common ancestor of placentals and marsupials. CharacteristicsTherians give birth to live young without a shelled egg.
HolotypeA holotype is the single physical example (or illustration) of an organism that was used when the species (or lower-ranked taxon) was formally described. It may be the only such physical example (or illustration), or it may have been explicitly designated as the holotype from among several examples. Under the International Code of Zoological Nomenclature (ICZN), there are several kinds of name-bearing types, and a holotype is one of them.
SkeletonA skeleton is the structural frame that supports the body of most animals. There are several types of skeletons, including the exoskeleton, which is a rigid outer shell that holds up an organism's shape; the endoskeleton, a rigid internal frame to which the organs and soft tissues attach; and the hydroskeleton, a flexible internal structure supported by the hydrostatic pressure of body fluids.
ChinaCountry in East AsiaChina, officially the People's Republic of China (PRC), is a country in East Asia. It is divided into 33 province-level divisions, including two special administrative regions. Beijing is the capital, while Shanghai is the most populous city by urban area. Its geography features the Central Plain, major rivers such as the Yangtze and Yellow River, deserts, subtropical and temperate forests, plateaus, and mountain ranges such as the Himalayas.
LiaoningManchu nameManchu scriptᠯᡳᠶᠣᠣ ᠨᡳᠩᡤᠣᠯᠣRomanizationLiyoo'ning goloManchu nameManchu scriptᠠᠪᡴᠠᡳᡳᠮᡳᠶᠠᠩᡤᠠᡤᠣᠯᠣRomanizationAbkai-imiyangga goloLiaoning is a coastal province in Northeastern China that is the smallest, southernmost, and most populous province in the region.
Late JurassicThe Late Jurassic is the third epoch of the Jurassic period, and it spans the geologic time from 161.5 ± 1.0 to 143.1 ± 0.6 million years ago (Ma), which is preserved in Upper Jurassic strata. In European lithostratigraphy, the name "Malm" indicates rocks of Late Jurassic age.
Basal (phylogenetics)In phylogenetics, basal is the direction of the base (or root) of a rooted phylogenetic tree or cladogram. The term may be more strictly applied only to nodes adjacent to the root, or more loosely applied to nodes regarded as being close to the root. Extant taxa that lie on branches connecting directly to the root are not more closely related to the root than any other extant taxa.
Early CretaceousThe 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 143.1 Ma to 100.5 Ma.
GenusGenus (; pl.: genera) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. 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.
Oxfordian ageSubdivision of the Jurassic according to the ICS, as of 2024.Vertical axis scale: Millions of years agoEtymologyName formalityFormalUsage informationCelestial bodyEarthRegional usageGlobal (ICS)Time scale(s) usedICS Time ScaleDefinitionChronological unitAgeStratigraphic unitStageTime span formalityFormalLower boundary definitionFAD of ammonite species Lower boundary definition candidatesHorizon of the AmmoniteCardioceras redcliffense.Lower boundary GSSP candidate section(s)Redcliff Point, Dorset, UK, Provence, FranceUpper boundary definitionFAD of the AmmonitePictonia bayleiUpper boundary GSSPFlodigarry, Skye, Scotland, UK57°39′40″N6°14′44″W / 57.6610°N 6.2455°W / 57.6610; -6.2455Upper GSSP ratified2021The Oxfordian is, in the ICS' geologic timescale, the earliest age of the Late JurassicEpoch, or the lowest stage of the Upper JurassicSeries.
ExtinctionTermination of a species' lineageThe thylacine (Thylacinus cynocephalus) is an example of a recently extinct species.Palaeotherium is an example of an extinct genus that is only recorded from fossil records before the existence of hominids.Extinction is the termination of a species via the death of its last member. A taxon may become functionally extinct before the death of its last member if it loses the capacity to reproduce and recover.*As an Amazon Associate I earn from qualifying purchases.