Table 35 in The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany)

Table 35. Conch ontogeny of Stockumites convexus (Vöhringer, 1960) from Oberrödinghausen.
dmconch shapewhorl cross section shapewhorl expansion2 mmthickly discoidal to thinly pachyconic; subevolute to evolute (ww/dm = 0.55–0.65; uw/dm = 0.40–0.50)moderately depressed; moderately to strongly embracing (ww/wh = 1.80–2.00; IZR = 0.25–0.35)low to moderate (WER = 1.60– 1.80)5 mmthickly discoidal; subevolute (ww/dm = 0.50–0.60; uw/dm = 0.30–0.40)weakly depressed; strongly embracing (ww/wh = 1.35–1.50; IZR = 0.35–0.45)low to moderate (WER = 1.60– 1.80)15 mmthickly discoidal; involute (ww/dm = 0.45–0.55; uw/dm = 0.05–0.10)weakly compressed; very strongly embracing (ww/wh = 0.80–1.00; IZR = 0.45–0.55)moderate to high (WER = 1.90– 2.10)25 mmthickly discoidal; involute (ww/dm = 0.45–0.55; uw/dm = 0.00)weakly compressed; very strongly embracing (ww/wh ~0.90; IZR = 0.50–0.55)moderate to high (WER = 1.90– 2.10)