Table 58 in The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany)

Table 58. Conch ontogeny of Nicimitoceras acre (Vöhringer, 1960) from Oberrödinghausen.
dmconch shapewhorl cross section shapewhorl expansion30 mmextremely discoidal; involuteweakly compressed; strongly embracinghigh(ww/dm ~0.35; uw/dm ~0.00)(ww/wh ~0.60; IZR ~0.42)(WER ~2.20)50 mmextremely discoidal; involutestrongly compressed; strongly embracingVery high(ww/dm ~0.30; uw/dm ~0.00)(ww/wh ~0.48; IZR ~0.42)(WER ~2.30)