FIGURE 5. Supposed antidimorphic pairs within the subfamily Sivajiceratinae. 1-2 in The taxonomic status of the genus Hubertoceras Spath: A new light on sexual dimorphism from the Callovian ammonites of Kutch, India

FIGURE 5. Supposed antidimorphic pairs within the subfamily Sivajiceratinae. 1-2. Sivajiceras paramorphum (M, JUM /SP/2, bed 7, lower Callovian of Jumara and m, JUM/SP/22, bed 2, lower Callovian of Keera). 3-4. Kinkeliniceras angygaster (M. JUM/KA/1, locality/stratigraphy unknown; m. JUM/KA/5, Medisar, Jura). 5-6. Obtusicostites obtusicosta (M, JUM/OO/1, bed 11, middle Callovian of Jumara and m, JUM/OO/14, locality/stratigraphy unknown). 'x' indicates the end of phragmocone. Small arrow indicates the presence of lappets. Scale bars=20 mm. The sources are: Jana et al. (2000, 2005) for stratigraphic information and Dutta and Bardhan (2016) for taxonomy.