Fig. 6From: Jaws of a large belemnite and an ammonite from the Aalenian (Middle Jurassic) of SwitzerlandReconstructions of the jaws of Leioceras opalinum (Reinecke 1818) from the Aalenian. a upper jaw after PIMUZ 5942. b lower jaw after the specimens shown in Mitta et al. (2015). c articulated jaws; the deep posterior incision allows movement in the body chamber where the preceding whorl restricts the whorl sectionBack to article page