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Mud-trapped herd captures evidence of distinctive dinosaur sociality

100%

Varricchio D. J., Sereno P. C., Xijin Z., Lin T., Wilson J. A., Lyon G. H.

Acta Palaeontologica Polonica

2008

tom 53

nr 4

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 individuals of the ornithomimid Sinornithomimus dongi perished while trapped in the mud of a drying lake or pond, the proximity and alignment of the mired skeletons indicating a catastrophic mass mortality of a social group. Histologic examination reveals the group to consist entirely of immature individuals between one and seven years of age, with no hatchlings or mature individuals. The Sinornithomimus locality supports the interpretation of other, more taphonomically ambiguous assemblages of immature dinosaurs as reflective of juvenile sociality. Adults of various nonavian dinosaurs are known to have engaged in prolonged nesting and post hatching parental care, a life history strategy that implies juveniles spent considerable time away from reproductively active adults. Herding of juveniles, here documented in a Cretaceous ornithomimid, may have been a common life history strategy among nonavian dinosaurs reflecting their oviparity, extensive parental care, and multi−year maturation.

Patterns of bird bone fragmentation in pellets of the Tawny Owl [Strix aluco] and the Eagle Owl [Bubo bubo] and their taphonomic implications

80%

Bochenski Z., Tomek T., Boev Z., Mitev I.

Acta Zoologica Cracoviensia

1993

tom 36

nr 2

Ograniczanie wyników

1 Acta Palaeontologica Polonica

1 Acta Zoologica Cracoviensia

1 Bochenski Z.

1 Boev Z.

1 Lin T.

1 Lyon G. H.

1 Mitev I.

1 Sereno P. C.

1 Tomek T.

1 Varricchio D. J.

1 Wilson J. A.

1 Xijin Z.

1 2008

1 1993

Wyniki wyszukiwania

Mud-trapped herd captures evidence of distinctive dinosaur sociality

Patterns of bird bone fragmentation in pellets of the Tawny Owl [Strix aluco] and the Eagle Owl [Bubo bubo] and their taphonomic implications