The Placental Mammal Ancestor and the Post–K-Pg Radiation of Placentals
A phylogenetic tree shows that crown clade Placentalia and placental orders originated after the K-Pg boundary, but phenomic signals overturn molecular signals to show Sundatheria (Dermoptera + Scandentia) as the sister taxon of Primates, a close link between Proboscidea and Sirenia (sea cows), and the monophyly of echolocating Chiroptera (bats).
Implications of Deltatheridium specimens for early marsupial history
The presence of specialized marsupial patterns of tooth replacement and cranial vascularization in Deltatheridium and the basal phylogenetic position of this taxon indicate that these features are characteristic of Metatheria as a whole.
Mammalian phylogeny: shaking the tree.
- M. Novacek
Recent palaeontological discoveries and the correspondence between molecular and morphological results provide fresh insight on the deep structure of mammalian phylogeny but has yet to resolve some important issues.
The Eutherian Mammal Maelestes gobiensis from the Late Cretaceous of Mongolia and the phylogeny of cretaceous eutheria
Maelestes is only the seventh Late Cretaceous eutherian known from the skull and the upper and lower dentitions, and the fifth known from some postcranial elements, and is identified as a member of Cimolestidae sensu Kielan-Jaworowska et al. (2007).
Cretaceous eutherians and Laurasian origin for placental mammals near the K/T boundary
The discovery of a new well-preserved mammal from the Late Cretaceous of Mongolia and a broad-scale phylogenetic analysis that includes all well-known CRETaceous fossils and a wide sample of morphology among Tertiary and recent placentals are reported.
South America's earliest rodent and recognition of a new interval of mammalian evolution
THE mid-Cenozoic immigration of rodents and primates to South America (when it was widely isolated by oceans) represents a pre-eminent problem in the biogeographical history of placental mammals. The…
Stem Lagomorpha and the Antiquity of Glires
The results support the hypothesis that rodents and lagomorphs radiated during the Cenozoic and diverged from other placental mammals close to the Cretaceous-Tertiary boundary.
The skull of leptictid insectivorans and the higher-level classification of eutherian mammals. Bulletin of the AMNH ; v. 183, article 1
- M. Novacek
The problem of relative affinities of various orders of placental mammals is one on which the study of the development of the skull can unfortunately throw but little light, and when it comes to attempt a grouping of the various orders inter se, grave difficulties are encountered.
A Theropod Dinosaur Embryo and the Affinities of the Flaming Cliffs Dinosaur Eggs
An embryonic skeleton of a nonavian theropod dinosaur was found preserved in an egg from Upper Cretaceous rocks in the Gobi Desert of Mongolia. Cranial features identify the embryo as a member of…
Earliest Eutherian Ear Region: A Petrosal Referred to Prokennalestes from the Early Cretaceous of Mongolia
The petrosal referred to Prokennalestes is intermediate in having a reduced anterior lamina and lateral flange, both of which are well developed in Vincelestes and essentially lacking in later eutherians and metatherians.