Palaeontology: Parental care in an ornithischian dinosaur

  title={Palaeontology: Parental care in an ornithischian dinosaur},
  author={Qingjin Meng and Jinyuan Liu and David J. Varricchio and Timothy Huang and Chunling Gao},
Crocodilians and birds show extensive parental care of their young, but whether this behaviour evolved independently in these two groups of living archosaurs is unknown — in part because features of parenting among related fossil groups such as dinosaurs are unclear. A dramatic specimen of the small ornithischian dinosaur Psittacosaurus sp. (Dalian Natural History Museum D2156) from Liaoning in China reveals a single adult clustered with 34 juveniles within an area of 0.5 square metres… 
A Nest of Protoceratops andrewsi (Dinosauria, Ornithischia)
The nest reaffirms the conclusion that Protoceratops lived (and died) in the sandy aeolian dune fields of the central Asian craton and implies that parental care and sociality are phylogenetically basal behaviors in Ceratopsia.
Post-natal parental care in a Cretaceous diapsid from northeastern China
It is reported that Philydrosaurus, a choristodere, from the Yixian Formation of western Liaoning Province, China, represents the oldest record of post-natal parental care in diapsids to the authors' knowledge.
A new troodontid dinosaur from China with avian-like sleeping posture
The discovery of a new troodontid taxon from the Early Cretaceous Yixian Formation of western Liaoning, China is reported, preserves several features that have been implicated in avialan origins and is preserved in the stereotypical sleeping or resting posture found in extant Aves.
A mixed-age classed ‘pelycosaur’ aggregation from South Africa: earliest evidence of parental care in amniotes?
The Late Middle Permian age of the varanopid family predates the previously known oldest fossil evidence of parental care in terrestrial vertebrates by 140 Myr.
A distinct dinosaur life history?
Oviparity and parental care, predicted for dinosaurs by their extant phylogenetic bracket, have the least fossil support and the author cautions against overextending parsimonious interpretations to extinct taxa with the risk of obscuring novel or intermediate behaviours.
Mud-Trapped Herd Captures Evidence of Distinctive Dinosaur Sociality
A unique dinosaur assemblage from the Cretaceous beds of western Inner Mongolia preserves geologic and paleontologic data that clearly delineate both the timing and mechanism of death. Over twenty
Early origin of parental care in Mesozoic carrion beetles
Diverse transitional silphids from the Mesozoic of China and Myanmar are reported that provide insights into the origins of parental care, and burying beetles of the genus Nicrophorus have their earliest first record in mid-Cretaceous Burmese amber.
Juvenile-Only Clusters and Behaviour of the Early Cretaceous Dinosaur Psittacosaurus
It has hitherto been hard to prove that any association of juvenile dinosaurs represents original behaviour rather than sedimentary accumulation, and it has been hard also to determine the ages of
Marsupial brood care in Cretaceous tanaidaceans
These discoveries provide early evidence of the peracarid reproductive strategy, as seen in modern Tanaidacea, and argue that this form of parental care may have played a role in the diversification of the lineage during this period.
Varanopid from the Carboniferous of Nova Scotia reveals evidence of parental care in amniotes
A fossil synapsid from the Carboniferous period of Nova Scotia that displays evidence of parental care is reported that adds to growing evidence that parental care was more widespread among Palaeozoic synapsids than previously thought and provides data permitting the identification of potential ontogeny-dependent traits within varanopids.


Juvenile Skeletal Structure and the Reproductive Habits of Dinosaurs
Comparison of the skeletal anatomy of perinatal extant archosaurians and per inatal dinosaurs suggests that known dinosaur hatchlings were precocial, which is consistent with the overall similarity in nesting behavior of dinosaurs and modern crocodilians.
An exceptionally preserved Lower Cretaceous ecosystem
Findings include feathered theropod dinosaurs and early birds, which provide additional, indisputable support for the dinosaurian ancestry of birds, and much new evidence on the evolution of feathers and flight.
Dinosaur Reproduction and Parenting
Non-avian dinosaur reproductive and parenting behaviors were mostly similar to those of extant archosaurs, but some reproductive behaviors, once thought exclusive to Aves, arose first in non-avians.
Growth curve of Psittacosaurus mongoliensis Osborn (Ceratopsia: Psittacosauridae) inferred from long bone histology
The first reconstruction of a growth curve (mass vs. age) for a dinosaur was made for this taxon using a new method called Developmental Mass Extrapolation, and the results suggest P. mongoliensis had an S-shaped growth curve characteristics of most extant vertebrates, and had maximal growth rates that exceeded extant reptiles and marsupials, but were slower than most avian and eutherian taxa.
On the Origin of Parental Care and the Early Evolution of Male and Female Parental Roles in Birds
It is proposed that biparental care originated then, when parental care was already obligatory and environmental conditions demanded the constant presence of a parent, and the system of care prevailing among living birds was changed.
Phylogenetic reconstruction of parental-care systems in the ancestors of birds.
The phylogenetic pattern should be used as a starting point for a more detailed analysis of parental care systems in birds and their relatives and the support for alternative avian phylogenies and the homology in parental care between crocodiles and birds is discussed.
Vertebrate Burrow Complexes from the Early Triassic Cynognathus Zone (Driekoppen Formation, Beaufort Group) of the Karoo Basin, South Africa
Abstract A scratch-marked burrow complex with multiple branching tunnels and terminal chambers was excavated from the Lower Triassic Driekoppen Formation, northeastern Free State, South Africa. The
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