User talk:Park dong chan

Psittacosaurus
Hello, Park dong chan;

I suppose you are the same as the anonymous IP editor 42.82.202.152, in which case thank you for registering because it makes it much simpler to communicate. I do not have problems with most of the 42.82... edits, because it is good that someone is keeping details consistent. I wish you would explain your actions with regard to Psittacosaurus and Raptorex, though. Regarding Psittacosaurus, please note the quotation from the citation in the introduction. The article is freely available online at the link:

"40Ar/39Ar dating of ash from the Lujiatun beds interbedded with the fossiliferous layers shows that the Lujiatun specimens are Barremian (123.2±1.0 Ma) in age [7] rather than Hauterivian (128±0.2 Ma) as was earlier reported [8] and thus that the Psittacosauridae occupies a shorter temporal duration than previously supposed."

The "earliest=124.2" element in the taxobox comes from the 1.0 Ma uncertainty in the date. J. Spencer (talk) 23:04, 26 May 2014 (UTC)

Blocked
I'm sorry, you've demonstrated you can't edit collaboratively here so I'm afraid I have to block you as cleaning up afterwards is time consuming. Cas Liber (talk · contribs) 21:38, 30 May 2014 (UTC)