Fact-Checking Wikipedia on Common Descent: The Evidence from Comparative Anatomy

In my previous article, I presented a critique of the first of Wikipedia's eight lines of evidence for common descent: the evidence from comparative physiology and biochemistry. In this article, I will discuss the second of those lines of argument, namely, the evidence from comparative anatomy.

Atavisms

Wikipedia's first subheading regarding the evidence from comparative anatomy is "Atavisms." What is an atavism? Wikipedia explains:

An atavism is an evolutionary throwback, such as traits...