I had emailed the authors with the following concern about possible contamination in the molecular dataset in this article on Apr. 3rd and have not yet recieved a response so I am posting my concerns here.

Dear Dr. Chlond,

I am emailing about your article on the phylogeny of Sirthenea published in PeerJ. I have tried PCRing old museum specimens myself and have had some very limited success, ...

Hi Dominik, I have a couple of questions on your paper: 1- What kind of tissue was used for extraction? The whole body, or just a single leg, or more legs? And of this, how much tissue did you use? 2- Did the extractions always worked? Since the alignment was relatively short, just 939bp, I was wondering how good the extraction protocol was in terms of sequence length. 3- Did you noticed a dif...