Odocoileus virginianus bones (white-tailed deer) (northeast of Frazeysburg, Ohio, USA) 3 : 無料・フリー素材/写真
Odocoileus virginianus bones (white-tailed deer) (northeast of Frazeysburg, Ohio, USA) 3 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Odocoileus virginianus (Zimmerman, 1780) - disarticulated white-tailed deer skeleton in Newark, Ohio, USA.Mammals are the dominant group of terrestrial vertebrates on Earth today. The group is defined based on a combination of features: endothermic (= warm-blooded), air-breathing, body hair, mother's milk, four-chambered heart, large brain-to-body mass ratio, two teeth generations, differentiated dentition, and a single lower jawbone. Almost all modern mammals have live birth - exceptions are the duck-billed platypus and the echidna, both of which lay eggs.Mammals first appear in the Triassic fossil record - they evolved from the therapsids (mammal-like reptiles). Mammals were mostly small and a minor component of terrestrial ecosystems during the Mesozoic. After the Cretaceous-Tertiary mass extinction at 65 million years ago, the mammals underwent a significant adaptive radiation - most modern mammal groups first appeared during this radiation in the early Cenozoic (Paleocene and Eocene).Three groups of mammals exist in the Holocene - placentals, marsupials, and monotremes. Other groups, now extinct, were present during the Mesozoic.Shown above is the disarticulated skeleton of a white-tailed deer, Odocoileus virginianus. Mammal bones are composed of hydroxyapatite (hydroxylapatite), Ca5(PO4)3(OH) - calcium hydroxy-phosphate. Bones are not solid - they have a porous, spongy internal structure.Classification: Animalia, Chordata, Vertebrata, Mammalia, Artiodactyla, CervidaeLocality: Trinway West 6 Outcrop - base of the eastern part of roadcut on the northwestern side of Rt. 16, 1.0 miles northeast of the Rt. 16-Old Riley Road intersection, northeast of the town of Frazeysburg & west of the town of Trinway, northwestern Muskingum County, Ohio, USA (~40° 08' 46.98" North latitude, 82° 04' 56.49" West longitude) |
| 撮影日 | 2018-03-04 11:49:43 |
| 撮影者 | James St. John |
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