tag:blogger.com,1999:blog-2156944512466583246.post4122939660001471197..comments2024-03-18T18:17:34.333+01:00Comments on Theropoda: Grandi theropodi dell'Asia, un leggero soffio bakkeriano e la rivalutazione di un taxon enigmaticoUnknownnoreply@blogger.comBlogger5125tag:blogger.com,1999:blog-2156944512466583246.post-82496798892333741492011-02-03T13:33:19.815+01:002011-02-03T13:33:19.815+01:00La "decandenza" non ha niente a vedere c...La "decandenza" non ha niente a vedere col numero di cladi. Il numero di cladi indica la disparità, mentre la "decandenza" di solito si stima con la diversità (numero delle specie).<br />Ad ogni modo, non ci sono evidenze concrete che la fine del Cretacico fosse una fase di declino nella diversità mondiale dei dinosauri.Andrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-42532735611697969312011-02-03T13:20:16.449+01:002011-02-03T13:20:16.449+01:00Nel quinto post dove descrivi l'arctometatarso...Nel quinto post dove descrivi l'arctometatarso, la presenza di un solo clado (i tyrannosauridi) come predatore <br />di grandi dimensioni viene spiegata con il successo evolutivo di questo clado.<br />Nella pubblicazione "The evolution of large-bodied theropod dinosaurs during the mesozoic in Asia", che hai segnalato <br />in un recente post, questa stessa condizione viene vista Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-73079237799500309882010-11-03T05:48:19.077+01:002010-11-03T05:48:19.077+01:00On a related note, I think the whole Yangchuanosau...On a related note, I think the whole Yangchuanosaurus/Sinraptor thing needs revising because blowed if I know how many genre or species there are. I don't know if they are lumped or split or exactly what part of the late Jurasic each is from. It does not help that I don't have the original papers, however. <br /><br /><br />Paul W.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-9106936764535305142010-11-03T00:32:59.961+01:002010-11-03T00:32:59.961+01:00Simoes, it happens by definition of "cycle&qu...Simoes, it happens by definition of "cycle": a cicle is defined by a peculiar top-predator. If the top-predator of a cycle descended from/belonged to the same group of the previous top-predator, the two cycles would have been considered a single cycle.<br />As I wrote in the post on Bakker's cycles, I think that these are mythologies and not science. For example, the Early Andrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-16599471649062757662010-11-02T23:53:28.582+01:002010-11-02T23:53:28.582+01:00It's interesting that none of the top predator...It's interesting that none of the top predator dinos in each "cycle" were descendants of the previous group. It make me miss the time when I was a child and Dinosaur books bring that simple scheme of "theropods split into carnosaurus and coelurosaurs" with carnosaur evolution in a single line of Triassic ornithosuchids > Jurassic allosaurids > Cretaceous João Simõeshttps://www.blogger.com/profile/10222169018695033058noreply@blogger.com