Species-level phylogenetic revision of the Ordovician orthide brachiopod Glyptorthis from North America

A phylogenetic analysis of 23 North American species of Glyptorthis was conducted to inform a systematic revision and ascertain evolutionary relationships amongst species. Both discrete and continuous characters, from which character states were determined using statistical methods, were utilized within a maximum parsimony approach.

Glyptorthis maquoketensis is recognized as a distinct species of Glyptorthis rather than a subspecies of G. insculpta . Glyptorthis virginica is herein synonymized with G. uniformis . Several species of Glyptorthis became widely distributed via dispersal events during the evolution of the clade.