The origin of mammals
نویسندگان
چکیده
منابع مشابه
The origin of eutherian mammals
Palaeontologically recognizable eutherians originated no later than the Early Cretaceous in warm, probably moderately seasonal climates. Immediate ancestors were small, sharing many anatomical, physiological and reproductive features with small modern marsupials. Development of characteristically eutherian features involved interactions of body size, rates of metabolism, energetic costs of repr...
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For many years evolutionists have pointed to the alleged transition of reptiles to mammals as being the best example of the natural origin of a major taxon. At first sight such claims appear to have considerable justification, but when the fossil evidence is closely examined it can be shown that there are some grave deficiencies, and the claim is not only factually unproved but also contains a ...
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Theria comprises all but three living mammalian genera and is one of the most ecologically pervasive clades on Earth. Yet, the origin and early history of therians and their close relatives (i.e., cladotherians) remains surprisingly enigmatic. A critical biological function that can be compared among early mammal groups is mastication. Morphometrics and modeling analyses of the jaws of Mesozoic...
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Anzali Wetland as a listed habitat in Montreux Record, was investigated for the mammal fauna during Jan. 2015 - Jan. 2016. About 165 km of water bodies and 200 km around Anzali Wetland were patrolled, respectively. By applying different methods, such as direct observation, different signs recording, using different sampling traps, nets and camera traps, twenty mammal species were identified fro...
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ژورنال
عنوان ژورنال: American Journal of Science
سال: 1899
ISSN: 0002-9599
DOI: 10.2475/ajs.s4-7.38.92