This mentioned taxonomy is an attempt to make an conclusive assignment from the different classifications of various scientists. Because the taxonomy may change due to the latest investigative methods and other findings, our map is a guide only.
R. Bieler, 2011 - Catalogue of Recent and fossil “worm-snail” taxa of the families Vermetidae, Siliquariidae, and Turritellidae (Mollusca: Caenogastropoda) - Zootaxa (2948), 1-103 (journal article, English)
J. J. Sepkoski, Jr., 2002 - A compendium of fossil marine animal genera - Bulletins of American Paleontology (363), 1-560 (serial monograph, English)
G. D. Hanna, 1943 - Characteristic fossils of California - Geologic Formations and Economic Development of the Oil and Gas Fields of California. (in Four Parts, Including Outline Geologic Map Showing Oil and Gas Fields and Drilled Areas) (), 165-182 (book chapter, English)