tag:blogger.com,1999:blog-2156944512466583246.post7360007436061791532..comments2024-03-18T18:17:34.333+01:00Comments on Theropoda: La coda destra della taglia theropodeUnknownnoreply@blogger.comBlogger25125tag:blogger.com,1999:blog-2156944512466583246.post-82168054250961562752013-06-13T18:44:36.349+02:002013-06-13T18:44:36.349+02:00Thanks a lot for the quick response!
1- Yes. Howev...Thanks a lot for the quick response!<br />1- Yes. However we do know the complete skeleton of T. rex, and can at least reconstruct it with a decent amount of accuracy to get an approximate figure in most other taxa, and using full body reconstructions to estimate size (there's a variety of ways to do that, from water displacement or graphic double integration to Seebachers metod or even by Darius Nauhttps://www.blogger.com/profile/01630359709576094063noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-9110225438560315982013-06-12T13:56:56.866+02:002013-06-12T13:56:56.866+02:00Just a couple of notes.
1- I agree that size estim...Just a couple of notes.<br />1- I agree that size estimations based on bone measurements are not perfect: they're just the most used, in particular for fragmentary species whose complete skeletons are unknown. Thus, more accurate methods are welcome.<br />2- Femur lenght is used more often than femur circunference: such method was developed for theropods only, scaling theropod reconstructionsAndrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-59645980071779811592013-06-12T13:23:35.402+02:002013-06-12T13:23:35.402+02:00I would like to note that weight estimation based ...I would like to note that weight estimation based on femur circunference has proven to be a most unreliable metod in the past. <br />According to it, the Acrocanthosaurus specimen NCSM 14345 should be 2,4t, as compared to 4,2t for T. rex specimen MOR 555 with the same method (Currie and Carpenter, 2000, description of aforementioned acrocanthosaurus specimen). Luckily these two specimens have Darius Nauhttps://www.blogger.com/profile/01630359709576094063noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-13788230534982498402013-05-05T15:59:41.227+02:002013-05-05T15:59:41.227+02:00Ah, ok, mi ero confuso con Spinosaurus.
Comunque,...Ah, ok, mi ero confuso con Spinosaurus.<br /><br />Comunque, un'altra cosa: chiedo scusa in anticipo perchè ti chiedo una cosa sulla taglia, ma quanto peserebbe uno Spinosaurus di 13,5 metri? Chiedo di nuovo scusa.Anonymoushttps://www.blogger.com/profile/07719837071456569344noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-88291164366753949802013-05-05T15:44:54.290+02:002013-05-05T15:44:54.290+02:00Ne sei sicuro? Rileggi la didascalia all'immag...Ne sei sicuro? Rileggi la didascalia all'immagine...Andrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-32430540539879074202013-05-05T15:39:24.302+02:002013-05-05T15:39:24.302+02:00Una domanda: ma Acrocanthosaurus non era un Carcha...Una domanda: ma Acrocanthosaurus non era un Carcharodontosauride, e di conseguenza, un carnosauro? Forse è la mia ignoranza (anzi, è quasi certo), ma sotto l'immagine tu affermi che A. atokensis è un megalosauroide.Anonymoushttps://www.blogger.com/profile/07719837071456569344noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-57259715712368091682013-02-13T20:12:50.431+01:002013-02-13T20:12:50.431+01:00No, it's not something worth of publishing. Ju...No, it's not something worth of publishing. Just suggestions for a blog post.Andrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-53822862528630704462013-02-13T19:22:00.180+01:002013-02-13T19:22:00.180+01:00Thank you,
regarding Spinosaurus proportions and ...Thank you,<br /><br />regarding Spinosaurus proportions and dimensions, is there some finding or publication in progress about your suggestions ?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-24535672372409424632013-02-13T17:36:14.944+01:002013-02-13T17:36:14.944+01:00That method is beyond my main field so cannot say ...That method is beyond my main field so cannot say much.<br />It's interesting since it shows how body mass estimates are affected by assumptions about muscle development.Andrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-91601512236220556792013-02-13T17:31:34.851+01:002013-02-13T17:31:34.851+01:00Thank you Dr Cau, that's why I suspected indee...Thank you Dr Cau, that's why I suspected indeed.<br /><br />Sorry for my pseudo, I don't have a google account, but I'm a usual reader of your great blog.<br /><br />But especially about Tyrannosaurus, what do you think of the recent last method of estimate by scanning which updates the total body mass of "Sue" at around 9 tons ?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-4207277760964739122013-02-13T17:00:10.193+01:002013-02-13T17:00:10.193+01:00Dear Anonimo,
based on femur proportions, Tyrannos...Dear Anonimo,<br />based on femur proportions, Tyrannosaurids are the most massive.Andrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-24583264459089274312013-02-13T16:58:25.842+01:002013-02-13T16:58:25.842+01:00Thank you Dr Cau,
Ultimately so, no known theropo...Thank you Dr Cau,<br /><br />Ultimately so, no known theropod seems to exceed 13 m TL. Sounds like a terrestrial limit for large bipedal predatory organisms.<br /><br />However, among all the very large theropods approaching or reaching this range (carcharodontosaurids, tyrannosaurids, spinosaurids, allosaurids), which kind of animal displays the most heaviliy built skeletal and muscular Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-56021380651920089002013-02-03T19:05:03.795+01:002013-02-03T19:05:03.795+01:00I never stated that Spinosaurus was proportioned a...I never stated that Spinosaurus was proportioned as a tyrannosaurid. I wrote (in another post, not here) that all the extrapolations producing adult Spinosaurus as longer than 14-15 meters are poorly supported.<br />It's currently unknown whether skull size in Spinosaurids decreased with age: being them long-snouted animals, it could result the opposite, with adults with proportionally longerAndrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-33033416064290103002013-02-03T18:14:55.332+01:002013-02-03T18:14:55.332+01:00Hello Cau. Im posting this on behalf of a forum us...Hello Cau. Im posting this on behalf of a forum user who gets an error reading 'URL contains illegal characters' when he tries to post)<br />It may be google translate wording it badly, but from what I can tell you are stating 17m comes from assuming Spinosaurus was proportioned like a tyrannosaurid. This is completely wrong; it assumes Spinosaurus was proportioned like a Baryonyx. Crazy Fishnoreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-72473306587381583882012-09-10T15:26:30.817+02:002012-09-10T15:26:30.817+02:00Andrea, I congratulate you on your stance regardin...Andrea, I congratulate you on your stance regarding big fragmentary Theropods.<br />It is enervating to see that nowadays, a lot of dinosaur enthusiast(even future palaeontologists) have verbal battles over rather insignificant stuff, even accusing professional palaeontologists of being biased, just because the palaeontologists figures do not fit their views.Sturisomahttps://www.blogger.com/profile/01309466707737056873noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-78684963229585001882012-08-17T19:12:48.839+02:002012-08-17T19:12:48.839+02:00E cosa ne pensi dell'ipotesi di una "rinc...E cosa ne pensi dell'ipotesi di una "rincorsa" evoluzionistica tra le dimensioni delle prede e quelle dei predatori ?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-67345217434056818162012-08-17T18:54:10.937+02:002012-08-17T18:54:10.937+02:00Mi pare una spiegazione troppo (veramente troppo) ...Mi pare una spiegazione troppo (veramente troppo) semplicistica.<br />Sia perché "clima" è un concetto molto generico, sia perché non ha senso parlare, ad esempio, del "clima del tardo Giurassico in Nord America", dato che il tardo Giurassico durò almeno 20 milioni di anni ed il Nord America è un intero continente, e quindi è plausibile che durante quei 20 milioni di anni ci Andrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-1640251956414476932012-08-17T18:42:52.501+02:002012-08-17T18:42:52.501+02:00Alcuni paleontologi indicano come cause del gigant...Alcuni paleontologi indicano come cause del gigantismo alcuni fattori ambientali, ribadendo che climi continentali o caldi favoriscono lo sviluppo dimensionale degli animali. <br />Secondo loro infatti diversi paleo-ecosistemi in cui la fauna tendeva al gigantismo, come il Nord America ed il Portogallo del tardo Giurassico,il Montana di fine Cretaceo e l' Argentina del cretaceo inferiore, Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-36670609955570425492012-08-10T15:32:09.244+02:002012-08-10T15:32:09.244+02:00Eccolo! è questo il metodo che usa Phill Manning n...Eccolo! è questo il metodo che usa Phill Manning nel documentario!<br />Grazie mille per le informazioni.<br />Giulio.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-15098689144372657532012-08-10T15:28:36.726+02:002012-08-10T15:28:36.726+02:00Si usano ricostruzioni 3d (sculture o digitali) mo...Si usano ricostruzioni 3d (sculture o digitali) molto fedeli di theropodi basate su scheletri molto completi, si stima la massa degli animali, si stabilisce una relazione matematica tra queste masse e qualche parametro osseo (di solito la lunghezza o la sezione del femore) e si applica la relazione matematica all'osso in scheletri meno completi.Andrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-37702048742646120292012-08-10T15:26:08.320+02:002012-08-10T15:26:08.320+02:00Se puoi mi potresti spiegare uno di quei metodi?
G...Se puoi mi potresti spiegare uno di quei metodi?<br />Giulio.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-16446008325619045782012-08-10T14:35:09.406+02:002012-08-10T14:35:09.406+02:00Esistono vari metodi, non avendo visto il document...Esistono vari metodi, non avendo visto il documentario che mi citi, non saprei rispondere.Andrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-28658930652411118992012-08-10T14:04:15.972+02:002012-08-10T14:04:15.972+02:00Volevo chiedere se il metodo usato da Phill Mannin...Volevo chiedere se il metodo usato da Phill Manning per calcolare le massime dimensioni dei Sauropodi era lo stesso per calcolare quelle dei theropodi?<br />Giulio.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-2760063754522534142012-08-10T13:54:07.761+02:002012-08-10T13:54:07.761+02:00Scusa ma non capisco la domanda.Scusa ma non capisco la domanda.Andrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.comtag:blogger.com,1999:blog-2156944512466583246.post-23997110700987194202012-08-10T13:47:28.898+02:002012-08-10T13:47:28.898+02:00In effetti ho un CD intitolato Dinosauri Oversize ...In effetti ho un CD intitolato Dinosauri Oversize dove Phill Manning calcola,guardando quali dimensioni le ossa potevano raggiungere e che peso potevano sopportare quali erano le massime dimensioni per i sauropodi. <br />Potrebbe essere lo stesso metodo con cui hanno calcolato i limiti di gigantismo dei vari theropodi?<br />Giulio.Anonymousnoreply@blogger.com