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Marsupials in Biological News

Marsupial lion tops African lion in fight to death

... major trauma and a rapid kill. Unlike any living mammalian carnivores, the marsupials carnassials were not only butchery tools but also active components in the ... (FE) analysis], that renders dynamic 3D models based on CT scans of the marsupials cranial mechanics and musculoskeletal architecture, Wroe has revealed that ...

The evolutionary foundation of genomic imprinting in lower vertebrates

... The study is reported in volume 54 (Issue 8, April, 2009) of Chinese Science Bulletin . Genomic imprinting has been identified in eutherians, marsupials and flowering plants, but no endogenous imprinted gene has been reported in other vertebrates and invertebrates. Therefore, genomic imprinting is ...

Unheard of life history for a vertebrate

... and humans that can live for a century) and at the lower end by a handful of animals that only live for about a year. The males in nine species of marsupials die off after a year, for example, as do most adults in about twelve species of lizards. But the chameleon described here, Furcifer labordi , not ...

Marsupial genome reveals insights into mammalian evolution

... The genetic code of marsupials has now been documented for the first time. An ... mammals 210 million years ago. The remaining marsupials split from the main (placental) group about 180 ... mammals. "Understanding the immune system of marsupials and monotremes will help us to conserve our ...

Researchers publish first marsupial genome sequence

... program and the study's senior author. marsupials and the ancestors of placental mammals diverged ... present in placental mammals, but missing from marsupials —that is, the genetic factors that may underlie ... involved in immunity, challenging the notion that marsupials possess only primitive immune systems. The ...

Small species back-up giant marsupial climate change extinction claim

... change, instead of humans, was responsible for wiping out Australian giant marsupials or megafauna 40,000 years ago. Instead of only excavating 'trophy ... in Australia - which evolved for 40 million years in isolation - giant marsupials ruled. Current theories suggest that between 50,000 and 20,000 years ...

Tiny bones rewrite textbooks

... to 30 million years ago." The team believes that more mammal specimens may emerge, perhaps even species that pre-date the split between pouched marsupials and live-bearing placental mammals. The St Bathans fossil field - which has also produced many other species of animals, including fish and birds ...

Where 'jumping genes' fear to tread

... TFRs are evolutionarily conserved features that existed prior to ?and have been largely maintained since ?the divergence of eutherian mammals and marsupials approximately 170 million years ago." The opossum was chosen for inclusion in the analysis because it is a marsupial that has a similar load of ...

Behavioral studies show UV contributes to marsupial color vision

... of the MWS/LWS gene, which enables the discrimination of green-red colors. But the researchers' previous physiological studies in Australian marsupials provided original evidence for the potential of trichromatic color vision in mammals other than primates. The findings were consistent in several ...
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