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Large Mesozoic mammals fed on young dinosaurs.
Nature. 2005 Jan 13; 433(7022):149-52.Nat

Abstract

Mesozoic mammals are commonly portrayed as shrew- or rat-sized animals that were mainly insectivorous, probably nocturnal and lived in the shadow of dinosaurs. The largest known Mesozoic mammal represented by substantially complete remains is Repenomamus robustus, a triconodont mammal from the Lower Cretaceous of Liaoning, China. An adult individual of R. robustus was the size of a Virginia opossum. Here we report a new species of the genus, represented by a skeleton with most of the skull and postcranium preserved in articulation. The new species is 50% larger than R. robustus in skull length. In addition, stomach contents associated with a skeleton of R. robustus reveal remains of a juvenile Psittacosaurus, a ceratopsian dinosaur. Our discoveries constitute the first direct evidence that some triconodont mammals were carnivorous and fed on small vertebrates, including young dinosaurs, and also show that Mesozoic mammals had a much greater range of body sizes than previously known. We suggest that Mesozoic mammals occupied diverse niches and that some large mammals probably competed with dinosaurs for food and territory.

Authors+Show Affiliations

Institute of Vertebrate Paleontology & Paleoanthropology, Chinese Academy of Sciences, PO Box 643, Beijing 100044, China. yhu@amnh.orgNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Historical Article
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15650737

Citation

Hu, Yaoming, et al. "Large Mesozoic Mammals Fed On Young Dinosaurs." Nature, vol. 433, no. 7022, 2005, pp. 149-52.
Hu Y, Meng J, Wang Y, et al. Large Mesozoic mammals fed on young dinosaurs. Nature. 2005;433(7022):149-52.
Hu, Y., Meng, J., Wang, Y., & Li, C. (2005). Large Mesozoic mammals fed on young dinosaurs. Nature, 433(7022), 149-52.
Hu Y, et al. Large Mesozoic Mammals Fed On Young Dinosaurs. Nature. 2005 Jan 13;433(7022):149-52. PubMed PMID: 15650737.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Large Mesozoic mammals fed on young dinosaurs. AU - Hu,Yaoming, AU - Meng,Jin, AU - Wang,Yuanqing, AU - Li,Chuankui, PY - 2004/05/29/received PY - 2004/10/08/accepted PY - 2005/1/15/pubmed PY - 2005/1/26/medline PY - 2005/1/15/entrez SP - 149 EP - 52 JF - Nature JO - Nature VL - 433 IS - 7022 N2 - Mesozoic mammals are commonly portrayed as shrew- or rat-sized animals that were mainly insectivorous, probably nocturnal and lived in the shadow of dinosaurs. The largest known Mesozoic mammal represented by substantially complete remains is Repenomamus robustus, a triconodont mammal from the Lower Cretaceous of Liaoning, China. An adult individual of R. robustus was the size of a Virginia opossum. Here we report a new species of the genus, represented by a skeleton with most of the skull and postcranium preserved in articulation. The new species is 50% larger than R. robustus in skull length. In addition, stomach contents associated with a skeleton of R. robustus reveal remains of a juvenile Psittacosaurus, a ceratopsian dinosaur. Our discoveries constitute the first direct evidence that some triconodont mammals were carnivorous and fed on small vertebrates, including young dinosaurs, and also show that Mesozoic mammals had a much greater range of body sizes than previously known. We suggest that Mesozoic mammals occupied diverse niches and that some large mammals probably competed with dinosaurs for food and territory. SN - 1476-4687 UR - https://www.unboundmedicine.com/medline/citation/15650737/Large_Mesozoic_mammals_fed_on_young_dinosaurs_ L2 - https://doi.org/10.1038/nature03102 DB - PRIME DP - Unbound Medicine ER -