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RE: Ichthyovenator, new spinosaurid from Early Cretaceous of Laos



The problem is that no one has established exactly what "definitive" means. 
 Allain et al. do cite most of those specimens, so they must consider them all 
non-definitive spinosaurids.  

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> Date: Thu, 26 Apr 2012 18:21:26 -0700
> From: mickey_mortimer111@msn.com
> To: dinosaur@usc.edu
> Subject: Re: Ichthyovenator, new spinosaurid from Early Cretaceous of Laos
>
>
> This paper has some troubling aspects, though the neural spines are 
> surprising and it's great to get a description of complete spinosaurid pubes 
> and ischia.
>
> First, Ichthyovenator is NOT the first definitive Asian spinosaurid. We have 
> Hone et al.'s (2010) baryonychine tooth from the Majiacun Formation of China, 
> many teeth of Siamosaurus suteethorni from Thailand, teeth and a partial 
> skeleton of Siamosaurus sp. from later sediments in Thailand (Buffetaut et 
> al., 2004), teeth of "Sinopliosaurus" fusuiensis from China, a 
> Siamosaurus-like tooth from Japan (Hasegawa et al., 2003), and a spinosaurine 
> tooth from the Mangchuan Formation China (Lu et al., 2009). Even if you 
> discount teeth, the partial skeleton was announced eight years ago.