First cranial remains of a gondwanatherian mammal reveal remarkable mosaicism

  title={First cranial remains of a gondwanatherian mammal reveal remarkable mosaicism},
  author={David W. Krause and Simone Hoffmann and John R. Wible and E. Christopher Kirk and Julia A. Schultz and Wighart Von Koenigswald and Joseph R. Groenke and James B. Rossie and Patrick M. O’Connor and Erik R. Seiffert and Elizabeth R. Dumont and Waymon L. Holloway and Raymond R. Rogers and Lydia J. Rahantarisoa and Addison D. Kemp and Haingoson Andriamialison},
Previously known only from isolated teeth and lower jaw fragments recovered from the Cretaceous and Palaeogene of the Southern Hemisphere, the Gondwanatheria constitute the most poorly known of all major mammaliaform radiations. Here we report the discovery of the first skull material of a gondwanatherian, a complete and well-preserved cranium from Upper Cretaceous strata in Madagascar that we assign to a new genus and species. Phylogenetic analysis strongly supports its placement within… 
Skeleton of a Cretaceous mammal from Madagascar reflects long-term insularity
The skeleton of Adalatherium hui, a newly discovered gondwanatherian mammal from Madagascar dated to near the end of the Cretaceous period, shows features consistent with a long evolutionary trajectory of isolation in an insular environment.
Craniofacial Morphology of Vintana Sertichi (Mammalia, Gondwanatheria) from the Late Cretaceous of Madagascar
ABSTRACT The Gondwanatheria are an enigmatic clade of Cretaceous and Paleogene mammals known from South America, Africa, Madagascar, India, and the Antarctic Peninsula. The eight valid species—each
Late-surviving stem mammal links the lowermost Cretaceous of North America and Gondwana
It is suggested that hahnodontid mammaliaforms had a much wider, possibly Pangaean distribution during the Jurassic–Cretaceous transition, and an exceptionally preserved skull of Cifelliodon wahkarmoosuch sheds light on the evolution of the ancestral mammalian brain.
Mammalian evolution: A beast of the southern wild
  • A. Weil
  • Geography, Environmental Science
  • 2014
The anatomy of the herbivorous, large-eyed and agile creature shows that gondwanatheres were related to the better-known multituberculates, a long-lived and successful group of (now also extinct) rodent-like mammals.
A large carnivorous mammal from the Late Cretaceous and the North American origin of marsupials
The phylogenetic analysis indicates that marsupials or their closest relatives evolved in North America, as part of a Late Cretaceous diversification of metatherians, and later dispersed to South America.
Introduction to Adalatherium hui (Gondwanatheria, Mammalia) from the Late Cretaceous of Madagascar
ABSTRACT Adalatherium hui is a latest Cretaceous (Maastrichtian) gondwanatherian mammal based on only a single specimen, a virtually complete, articulated, and well-preserved skull and postcranial
New Jurassic mammaliaform sheds light on early evolution of mammal-like hyoid bones
A Jurassic fossil shows that early premammalian ancestors possessed hyoids similar to those seen in mammals today, and a new Jurassic docodontan mammaliaform found in China that is preserved with the hyoid bones is reported.
Introduction, Systematic Paleontology, and Geological Context of Vintana Sertichi (Mammalia, Gondwanatheria) from the Late Cretaceous of Madagascar
The craniodental evidence provided by Vintana supports inclusion in Sudamericidae, the monophyly of Gondwanatheria, and the position of Gondeonatheria as nested within or sister to Multituberculata.
Mandibular and dental characteristics of Late Triassic mammaliaform Haramiyavia and their ramifications for basal mammal evolution
Tests of competing phylogenetic hypotheses with new data show that Late Triassic haramiyids are a separate clade from multituberculate mammals and are excluded from the Mammalia, suggesting that dietary diversification is a major factor in the earliest mammaliaform evolution.


Highly specialized mammalian skulls from the Late Cretaceous of South America
The first mammalian remains from the early Late Cretaceous of South America are described, including two partial skulls and jaws of a derived dryolestoid showing dental and cranial features unknown among any other group of Mesozoic mammals, and an unsuspected morphological and ecological diversity for non-tribosphenic mammals is revealed.
The first gnathic remains of Sudamerica: implications for gondwanathere relationships
ABSTRACT The Gondwanatheria is an enigmatic group of mammals known from the Late Cretaceous and Paleocene of Argentina and the Late Cretaceous of Madagascar and India. Although originally believed to
The Phylogenetic Affinities of the Enigmatic Mammalian Clade Gondwanatheria
It is hypothesized that the anterior molariforms of sudamericid gondwanatherians evolved from blade-like precursors similar to the p4 of Ferugliotherium, possibly in response to the appearance of grasses in Gondwana during the Cretaceous.
A pug-nosed crocodyliform from the Late Cretaceous of Madagascar
An exquisitely preserved specimen of a new taxon from the Late Cretaceous of Madagascar is reported, possessing an extremely blunt snout, a tall, rounded skull, an anteriorly shifted jaw joint and clove-shaped, multicusped teeth reminiscent of those of some ornithischian dinosaurs.
Distinctive mammal-like reptile from Mexico and its bearing on the phylogeny of the Tritylodontidae
Bocatherium mexicanum is the first mammal-like reptile and probably the oldest terrestrial vertebrate from Mexico and shows a close relationship to Bienotheroides1 of China and Stereognathus2,3 of Great Britain.
Cosmopolitanism among Gondwanan Late Cretaceous mammals
The occurrence of a highly specialized and distinctive group of extinct mammals, the Sudamericidae (Gondwanatheria), in the Late Cretaceous of Madagascar and India is reported, which is the first evidence of gondwanatheres outside South America and the first indication of cosmopolitanism among Late CRETaceous Gondwanan mammals.
A giant frog with South American affinities from the Late Cretaceous of Madagascar
A recently discovered Late Cretaceous anuran is described that differs strikingly in size and morphology from extant Malagasy taxa and is unrelated either to them or to the predicted occupants of the Madagascar–Seychelles–India landmass when it separated from Africa 160 million years ago (Mya).
Gondwanatheria and ?Multituberculata (Mammalia) from the Late Cretaceous of Madagascar
Five new specimens from the Late Cretaceous of Madagascar, including a virtually complete lower molariform cheek tooth, two fragmentary cheek teeth, and a fragmentary lower incisor are referred to the Sudamericidae (Gondwanatheria).
Large Mesozoic mammals fed on young dinosaurs
Mesozoic mammals are commonly portrayed as shrewor ratsized animals that were mainly insectivorous, probably nocturnal and lived in the shadow of dinosaurs. The largest known Mesozoic mammal
Persistence of a Mesozoic, non-therian mammalian lineage (Gondwanatheria) in the mid-Paleogene of Patagonia
The new taxon adds evidence regarding the extensive radiation of the Gondwanatheria throughout the Southern Hemisphere, persistence of several lineages well after the Cretaceous/Paleogene boundary, and early evolution of hypsodont types among South American herbivorous mammals.