Table 33 in The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany)

Table 33. Conch ontogeny of Stockumites undulatus (Vöhringer, 1960) from Oberrödinghausen.
dmconch shapewhorl cross section shapewhorl expansion2 mmthinly pachyconic; subevolute (ww/dm ~0.70; uw/dm ~0.35)moderately depressed; strongly embracing (ww/wh ~1.90; IZR ~0.35)low (WER ~1.70)4 mmthinly pachyconic; subinvolute (ww/dm ~0.70; uw/dm ~0.25)weakly depressed; very strongly embracing (ww/wh ~1.50; IZR ~0.45)moderate (WER ~1.80)12 mmthinly pachyconic; involute (ww/dm ~0.65; uw/dm ~0.05)weakly depressed; very strongly embracing (ww/wh ~1.10; IZR ~0.55)moderate (WER ~1.80)20 mmthickly discoidal; involute (ww/dm ~0.55; uw/dm ~0.02)weakly compressed; very strongly embracing (ww/wh ~0.95; IZR ~0.55)moderate (WER ~1.90)