Treatise on Invertebrate Paleontology (2023), Part V, Second Revision, Hemichordata - Shipped US ONLY

This second revision of the Graptolite Treatise (the previous 1970 revision was 163 pages) was necessitated by an explosion of new research linking extant and fossil Hemichordata, as well as a substantial increase in newly identified genera. Graptolithina are the focus of the volume, with over 650 described genera presented.
The volume also includes extant Pterobranchia and Enteropneusta, formerly identified only as extant ‘wormlike organisms.’