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- Archosaur - Wikipedia, the free encyclopedia: Archosaurs (Greek for 'ruling lizards') are a group of diapsid amniotes represented by modern birds and crocodilians. This group also includes extinct non-avian dinosaurs, pterosaurs and relatives of crocodiles.
June 30th
- The Phylogenetic Relationship of Tetrapod, Coelacanth, and Lungfish Revealed by the Sequences of Forty-Four Nuclear Genes -- Takezaki et al. 21 (8): 1512 -- Molecular Biology and Evolution: Abstract: "The origin of tetrapods is a major outstanding issue in vertebrate phylogeny. Each of the three possible principal hypotheses (coelacanth, lungfish, or neither being the sister group of tetrapods) has found support in different sets of data. In an attempt to resolve the controversy, sequences of 44 nuclear genes encoding amino acid residues at 10,404 positions were obtained and analyzed. However, this large set of sequences did not support conclusively one of the three hypotheses. Apparently, the coelacanth, lungfish, and tetrapod lineages diverged within such a short time interval that at this level of analysis, their relationships appear to be an irresolvable trichotomy.&qu ot;
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- A Guide to Vertebrates and Invertebrates: A Backbone Makes All the Difference
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- New "Jelly Pump" Rewrites Carbon Cycle | The Resilient Earth: According to a report in the Economist, the researchers were using a remotely operated deep-sea vehicle to study the sea floor near an oil pipeline when they happened upon the graveyard, but they immediately recognized the possible importance of their discovery. The existence of such large deposits of thaliacean corpses calls into question accepted thinking about one important aspect of climate change: how much carbon from the atmosphere ends up at the bottom of the sea? If thaliaceans are falling to the bottom of the sea in large numbers, they might be taking a lot of carbon with them. As we explained in The Resilient Earth, there are two large pools of terrestrial carbon; geologic carbon stored in rock and fossil fuel deposits, and biologic carbon stored in living things or ?in play? in the atmosphere and oceans. The source of both types of stored carbon is life.
May 30th
- Digestive System of Vertebrates: Home
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Mangrove-Dependent Animals Globally Threatened - Terra Daily
More than 40 percent of a sample of amphibians, reptiles, mammals, and birds that are restricted to mangrove ecosystems are globally threatened with extinction, according to an assessment published in the July/August issue of BioScience. The study ...
World's mangrove-dependent animals threatened with extinction - Newstrack India
Washington, July 1 (ANI): An assessment indicates that more than 40 percent of a sample of amphibians, reptiles, mammals, and birds that are restricted to mangrove ecosystems are globally threatened with extinction. The assessment, by David A. Luther ...
Strange fish throws away genes - San Francisco Examiner
Almost all stories about the lamprey are strange. It has been called the alien fish, the living fossil, and has some of the scariest teeth in the sea. But the newest characteristic of the fish might be strangest yet: it throws away parts of its ...
Daily Minute: Thursday, July 2 - Patriot Ledger
Part of the National Science Foundation Digital Libraries Initiative, this project uses a high-resolution scanner to take images through solid objects like bones or rock, then stack them to create a 3D model of vertebrates both living and extinct
Loss of mangrove forests equals extinction for wildlife - San Francisco Examiner
Mangroves are threatened by coastal development, pollution, overexploitation, mariculture, and changes in sea level and salinity. In short, we?re wiping them out. We?ve already destroyed almost 40% of the world?s mangroves and every single ...
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