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III: Six Continental Top Ten

Bob Strauss ha pubblicato, pochi giorni fa, una curiosa collezione di top ten about dinosaurs. This is not the usual list of the Dinosaurs larger (or smaller), often subject to new interpretations, but a more interesting list of the Dinosaurs more important for each continent.
The article proposed a model of continental division are: North America, South America, Europe, Asia, Africa, in the end, Oceania and Antarctica have been grouped into a single top ten (probably the most enlightening of six).
Dinosaurs chosen were filtered according to relevance and popularity. Find the top ten in six this page.
Beware though, the lists are not escaped errors and oversights. An example is Dilophosaurus Wetherill, which is listed as one of the most important Asian dinosaurs, when in fact it is an American animal. To bring confusion was probably "Dilophosaurus sinensis, an example of China in the past cited as Dilophosaurus but now considered, by some, a different animal.

For the rest, what do you think?

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Darwinopterus, egg and sexual dimorphism

Darwinopterus modularis is one of the Upper Jurassic pterosaur Asia that has achieved a considerable popularity, both among those who study these bizarre animals in the ranks of amateurs. It is not difficult to understand why. Many specimens have been identified and, overall, this elegant animal is considered a "mix" of features typical of the two major groups in Pterosauria: Ramphorhyncoidea and Pterodactyloidea. The chosen name for the genus is also a dedication to Charles Darwin.

last few days has been officially shown a new example of Darwinopterus, which reveals important information and drugs. The fact sheet is visible ever laid an egg, which is behind the adult pool. The presence of the egg can be inferred that the sample was obviously a female. But the rare fossils like this one usually have much more to tell ...
who observed and studied the sample has reason to believe that it was the victim of a violent incident that led to the fall in water and then the animal's death. In witness whereof the left front leg fractured and therefore unsuitable for flight.
The sample test is also a marked sexual dimorphism in Darwinopterus, which previously was assumed for the vast majority of crested pterosaurs and this year has further evidence to support it. The female has no crest fact that in 2009, had been observed in Darwinopterus first described and subsequently in other specimens of the same species. Another interesting detail are the hips a bit wider than those of crested specimens (males) and that definitely favored the release of eggs from the mother's body.

Female (left) and male (right) of Darwinopterus. Reconstruction of Mark Witton.