Treatise Online publishes chapters prepared for parts of the Treatise on Invertebrate Paleontology as they are ready, rather than waiting for an entire hard copy Treatise to be printed. Chapters from the following Treatise parts are completed or nearing completion: Part E (hypercalcified sponges), Part F (Cnidaria), Part G (bryozoans), Part L (ammonoids), Part M (coleiods), Part N (bivalves.
No article on the Treatise on Invertebrate Paleontology would be complete without first discussing its founder and longest-serving Editor: Raymond Cecil Moore. Moore was a cofounder of the Society for Economic Paleontologists and Mineralogists (SEPM), which was formally established in 1927 (Moore, 1940), and he served as one of its first Presidents in 1928. In 1944, a committee of the Paleontological Society, chaired by Benjamin F.
Yuanliang Meng
Howell of Princeton University, invited Moore to lead a project to develop a textbook on invertebrate paleontology that would update and replace volume 1 of the old Textbook of Palaeontology.