2013 November 21, Neil H. Landman, Kazushige Tanabe, Richard Arnold Davis, Ammonoid Paleobiology, Springer Science & Business Media, →ISBN, page 653:
... planorbiconic, costate microconchs (and juveniles) of the perisphinctio Choffatia. Accessories were the oxyconic, smooth oppeliid Oxycerites, with complicated sutures and matching, strong septa, the elliptospheroconic tulitid[…]
2015 July 22, Christian Klug, Dieter Korn, Kenneth De Baets, Isabelle Kruta, Royal H. Mapes, Ammonoid Paleobiology: From anatomy to ecology, Springer, →ISBN, page 702:
... planorbiconic and weakly sculpted with 3–5 mm diameter (Westermann 1958). The juvenile phase (=juvenile stage; juvenile to mid-age in Lukeneder et al. 2010) comprises the late juvenile plus adolescent/immature or preadult phase with[…]
