Table 6 in The ammonoids from the Gattendorfia Limestone of Gattendorf (Devonian-Carboniferous boundary; Upper Franconia, Germany)

Table 6. Conch ontogeny of Stockumites subbilobatus (Münster, 1839) from Gattendorf.
dmconch shapewhorl cross section shapewhorl expansion2 mmthickly discoidal; evolute (ww/dm ~ 0.55; uw/dm ~ 0.45)moderately depressed; moderately embracing (ww/wh ~ 1.90; IZR ~ 0.25)low (WER ~ 1.65)5 mmthickly discoidal; evolute (ww/dm ~ 0.50; uw/dm ~ 0.50)moderately depressed; strongly embracing (ww/wh ~ 1.85; IZR ~ 0.35)low (WER ~ 1.50)15 mmthinly pachyconic; subinvolute (ww/dm ~ 0.65; uw/dm ~ 0.15)weakly depressed; very strongly embracing (ww/wh ~ 1.25; IZR ~ 0.55)moderate (WER ~ 1.80)30 mmthickly discoidal; involute (ww/dm ~ 0.50; uw/dm ~ 0.00)weakly compressed; very strongly embracing (ww/wh ~ 0.85; IZR ~ 0.50)moderate (WER ~ 1.90)