Correcting an error I made:

 Hello everyone,

A few weeks ago I published a blogpost talking about Doran and McLain's (2022) analysis on the Ankylosauria. I made a mistake in that post saying that Doran et al. (2018) gave reasonable evidence to suggest four holobaramins within the Ankylosauria. That was a mistake, I misread the paper, but upon closer inspection of the Doran et al. (2018) study, I realized I had made a mistake. 

See, Doran et al. 2018 ran analyses on two datasets, one from Vickaryous et al. (2004) and another from Zheng et al. (2018) (the latter is the same one Doran & McLain [2022] used). The BDC (Fig. 63) on the 2004 dataset was where I made the mistake. I read the graph as showing four groups with significant negative correlation surrounding each group. But if you look closer, The group at the top right is the outgroup (Lesothosaurus + Huayangosaurus) and the 'group' right to its left (Gastonia + Gargoleosaurus) is actually a part of the larger Nodosauridae group (Edmontonia ...).

Fig. 63 from Doran et al. 2018.

Furthermore, the paper shows an MDS plot (Fig. 64) of the 2004 dataset where the only clearly separated group is the outgroup. A series, I believe can be shown here, from green to gray (green = Nodosauridae; gray = Ankylosauridae) but this may not conform exactly to the fossil's first appearance.


Consistently, the analyses on both datasets showed a distinction between Nodosauridae and Ankylosauridae with Gargoyleosaurus and Gastonia being the oddballs in the analyses.

Fig. 64 from Doran et al. 2018.
This does still seem to suggest separating the two groups into their own holobaramins (Ankylosauridae and Nodosauridae respectively). This does not mean that the members of either groups could not cross over and reproduce to produce viable offspring. That is something we may never be able to find out using our current methodology. 

This just goes to show, make sure you read your sources carefully and make sure you read the sources of others before accepting the conclusions they make based on the sources.

This is a mistake I hope not to make again. I'd like to apologize to Dr. Neal Doran and coworkers for butchering their study. Thank you for your time!

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