Table 15 in The ammonoids from the Gattendorfia Limestone of Gattendorf (Devonian-Carboniferous boundary; Upper Franconia, Germany)

Table 15. Conch ontogeny of Acutimitoceras acutum (Schindewolf, 1923) from Gattendorf und Saalfeld.
dmconch shapewhorl cross section shapewhorl expansion2 mmthickly discoidal; subevolute (ww/dm ~ 0.58; uw/dm ~ 0.40)moderately depressed; strongly embracing (ww/wh ~ 1.75; IZR ~ 0.40)low (WER ~ 1.55)5 mmthickly discoidal; subinvolute (ww/dm ~ 0.55; uw/dm ~ 0.20)weakly depressed; very strongly embracing (ww/wh ~ 1.25; IZR ~ 0.45)low (WER ~ 1.70)15 mmthinly discoidal; involute (ww/dm ~ 0.40; uw/dm ~ 0.08)weakly compressed; very strongly embracing (ww/wh ~ 0.65; IZR ~ 0.45)high (WER ~ 2.05)30 mmextremely discoidal; involute (ww/dm ~ 0.30; uw/dm ~ 0.00)weakly compressed; very strongly embracing (ww/wh ~ 0.55; IZR ~ 0.45)high (WER ~ 2.20)