tag:blogger.com,1999:blog-3248412803814730250.post3496413962239212373..comments2024-03-17T01:48:59.504-07:00Comments on The Theropod Database Blog: Haplocheirus and support for arctometatarsalian alvarezsauridsMickey Mortimerhttp://www.blogger.com/profile/08831823442911513851noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-3248412803814730250.post-10702249280195631212010-02-03T02:48:10.754-08:002010-02-03T02:48:10.754-08:00This post reminds me of my (with Michel Laurin) 20...This post reminds me of my (with Michel Laurin) 2008 Cont. Zool. paper! You should publish, too. Basically just take this post, insert a hundred references, and submit it.<br /><br />I also agree that the annotated figure is a very good idea. I think there are lots of cases in the literature where different teams mean completely different things by the same character description.<br /><br /><i>However, from what I can tell, Choiniere et al. never found the most parsimonious trees in their dataset. Running it in PAUP with the same characters ordered results in trees 1887 steps long, not 1998 steps as reported by the authors. I think the problem is that they used TNT, which has resulted in few and suboptimal trees for me in the past.</i><br /><br /><b>This must be published!!!</b><br /><br />(Unless you ordered the wrong characters – but shouldn't that make the tree longer instead of shorter?)David Marjanovićnoreply@blogger.comtag:blogger.com,1999:blog-3248412803814730250.post-4139114607383522392010-02-01T07:37:26.279-08:002010-02-01T07:37:26.279-08:00davidmaas: I agree with your comment " I part...davidmaas: I agree with your comment " I particularly like the green/red annotated image - that should be done more often!". It's something that's often bothered me about many published analyses is that there are often not accompanying figures to explicitly explain the characters. There are several disturbing errors in both crocodylomorph and ornithischian analyses where I think if the authors had been forced to include images of the charcter states, certain mistakes would not be repeated ad nauseum in analyses which followed the original authors. Some issues that immediately come to mind include the exits for cranial nerves in crocodylomorphs. There was an error in the character list of Clark's thesis and that mistake has been repeated in every subsequent analysis which used his characters.<br /><br />Excellent post Mickey. I'm extremely jealous of how you've packed so much into this blog in a short time. Keep up the good work.Nickhttps://www.blogger.com/profile/08718847558790015112noreply@blogger.comtag:blogger.com,1999:blog-3248412803814730250.post-18926734648132575342010-02-01T02:46:56.296-08:002010-02-01T02:46:56.296-08:00Good catch on the ordered characters, Andrea. I&#...Good catch on the ordered characters, Andrea. I'll see if ordering the correct characters fixes the problem tomorrow. But why oh why did the authors use TNT numeration for the ordered list, yet use PAUP numeration for the actual character list?! Argh.Mickey Mortimerhttps://www.blogger.com/profile/08831823442911513851noreply@blogger.comtag:blogger.com,1999:blog-3248412803814730250.post-25905658921426492512010-02-01T02:25:52.121-08:002010-02-01T02:25:52.121-08:00Very good post, Mickey!
I also noticed that the li...Very good post, Mickey!<br />I also noticed that the list of the ordered/additive characters in the supp. info. follows the TNT numeration (that is, the first character is the #"0"), and so differs from PAUP's one (where the first character is #1). This may explain in part why ordering in PAUP the characters using the list of ordered characters from the supp. info. results a different tree lenght.Andrea Cauhttps://www.blogger.com/profile/10855060597677361866noreply@blogger.comtag:blogger.com,1999:blog-3248412803814730250.post-41679077980782672932010-02-01T02:09:07.039-08:002010-02-01T02:09:07.039-08:00Thanks very much for this frighteningly detailed a...Thanks very much for this frighteningly detailed analysis. It helps me understand more exactly what the scientific process does, and how complex determining such a relationship can be. I particularly like the green/red annotated image - that should be done more often! Visually summarizes all of that latingreek text.davidmaashttps://www.blogger.com/profile/16696298300141402317noreply@blogger.com