Table 79 in The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany)

Table 79. Conch ontogeny of Zadelsdorfia crassa Schmidt, 1924 from Oberrödinghausen.
dmconch shapewhorl cross section shapewhorl expansion2 mmthickly discoidal; evolute (ww/dm = 0.45–0.55; uw/dm = 0.45–0.55)moderately depressed; weakly embracing (ww/wh = 1.60–2.00; IZR ~0.12)low (WER = 1.55–1.75)5 mmthinly discoidal; very evolute (ww/dm = 0.35–0.45; uw/dm = 0.60–0.65)moderately depressed; weakly embracing (ww/wh = 1.60–2.00; IZR ~0.12)Very low to low (WER = 1.40–1.55)15 mmthickly discoidal to thinly pachyconic; evolute (ww/dm = 0.55–0.65; uw/dm = 0.45–0.55)moderately to strongly depressed; moderately embracing (ww/wh = 1.80–2.25; IZR ~0.25)low (WER = 1.55–1.70)30 mmthinly pachyconic; subinvolute to subevolute (ww/dm = 0.60–0.72; uw/dm = 0.25–0.35)weakly to moderately depressed; strongly embracing (ww/wh = 1.30–1.80; IZR ~0.40)low (WER = 1.60–1.75)50 mmThickly discoidal; subinvolute (ww/ dm ~0.55; uw/dm ~0.25)weakly depressed; strongly embracing (ww/wh ~1.20; IZR ~0.40)moderate (WER ~1.85)