Alsatites is an extinct genus of cephalopod belonging to the Ammonite subclass. They lived during the Hettangian and are generally extremely evolute, many whorled. Keel broad and blunt organisms, they also exhibit a primary ribbing which is close and persistent.
References Notes
Bibliography Arkell, et al.,1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L (Ammonoidea). Geol Soc of America and Univ Kansas Press, Revised 2013, Part L, Michale K. Howarth
External links Blog post about Hettangian ammonites by Peter Reiter