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Your search keyword '"Lacovara, Kenneth J."' showing total 2 results
Start Over Author "Lacovara, Kenneth J." Region china
2 results on '"Lacovara, Kenneth J."'

1. A Nearly Modern Amphibious Bird from the Early Cretaceous of Northwestern China.

Author

Hai-Lu You, Lamanna, Matthew C., Harris, Jeradl D., Chiappe, Luis M., O'Connor, Jingmai, Shu-an Ji, Jun-chang Lü, Chong-xi Yuan, Da-qing Li, Xing Zhang, Lacovara, Kenneth J., Dodson, Peter, and Qiang Ji

Subjects
*WATER birds, *BIRD behavior, *CRETACEOUS paleoecology, *FOSSILS, *TAXONOMY, *ANATOMY, *AMPHIBIAN culture, *ANIMAL culture
Abstract

Three-dimensional specimens of the volant fossil bird Gansus yumenensis from the Early Cretaceous Xiagou Formation of northwestern China demonstrate that this taxon possesses advanced anatomical features previously known only in Late Cretaceous and Cenozoic ornithuran birds. Phylogenetic analysis recovers Gansus within the Ornithurae, making it the oldest known member of the clade. The Xiagou Formation preserves the oldest known ornithuromorph-dominated avian assemblage. The anatomy of Gansus, like that of other non-neornithean (nonmodern) ornithuran birds, indicates specialization for an amphibious life-style, supporting the hypothesis that modern birds originated in aquatic or littoral niches. [ABSTRACT FROM AUTHOR]

Published
2006
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2. A nearly modern amphibious bird from the Early Cretaceous of northwestern China.

Author

You HL, Lamanna MC, Harris JD, Chiappe LM, O'connor J, Ji SA, Lü JC, Yuan CX, Li DQ, Zhang X, Lacovara KJ, Dodson P, and Ji Q

Subjects
Animals, Birds physiology, China, Environment, Feathers anatomy & histology, Femur anatomy & histology, Flight, Animal, Hindlimb anatomy & histology, Humerus anatomy & histology, Locomotion, Phylogeny, Spine anatomy & histology, Toes anatomy & histology, Water, Wings, Animal anatomy & histology, Birds anatomy & histology, Birds classification, Bone and Bones anatomy & histology, Fossils
Abstract

Three-dimensional specimens of the volant fossil bird Gansus yumenensis from the Early Cretaceous Xiagou Formation of northwestern China demonstrate that this taxon possesses advanced anatomical features previously known only in Late Cretaceous and Cenozoic ornithuran birds. Phylogenetic analysis recovers Gansus within the Ornithurae, making it the oldest known member of the clade. The Xiagou Formation preserves the oldest known ornithuromorph-dominated avian assemblage. The anatomy of Gansus, like that of other non-neornithean (nonmodern) ornithuran birds, indicates specialization for an amphibious life-style, supporting the hypothesis that modern birds originated in aquatic or littoral niches.

Published
2006
Full Text
View/download PDF

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