Merostomoidea Explained

Merostomoidea is a paraphyletic group of fossil arthropods. They have been described as a transitional form between trilobites and true chelicerates.

Sources

• https://web.archive.org/web/20101221002449/http://palaeos.com/Invertebrates/Arthropods/Arachnomorpha.html#Merostomoidea