Table 52 in The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany)

Table 52. Conch ontogeny of Costimitoceras ornatum Vöhringer, 1960 from Oberrödinghausen. dmconch shapewhorl cross section shapewhorl expansion5 mmthickly discoidal; subevoluteweakly depressed; strongly embracingmoderate(ww/dm ~0.55; uw/dm ~0.35)(ww/wh ~1.40; IZR ~0.35)(WER ~1.75)15 mmthickly discoidal; involuteweakly compressed; very strongly embracingmoderate(ww/dm ~0.50; uw/dm ~0.05)(ww/wh ~0.90; IZR ~0.50)(WER ~1.95)25 mmthinly discoidal; involuteweakly compressed; very strongly embracinghigh(ww/dm ~0.40; uw/dm ~0.00)(ww/wh ~0.70; IZR ~0.45)(WER ~2.10)表52 产自奥伯勒丁豪森（Oberrödinghausen）的饰纹肋角石（Costimitoceras ornatum Vöhringer, 1960）的壳体个体发育 5毫米阶段：壳体外形为厚盘状、半外卷、弱凹陷、强包旋；旋环形态参数适中（ww/dm≈0.55；uw/dm≈0.35），旋横切面参数为（ww/wh≈1.40；IZR≈0.35），旋环扩展率（WER）≈1.75 15毫米阶段：壳体外形为厚盘状、内卷、弱压缩、极强包旋；旋环形态参数适中（ww/dm≈0.50；uw/dm≈0.05），旋横切面参数为（ww/wh≈0.90；IZR≈0.50），旋环扩展率（WER）≈1.95 25毫米阶段：壳体外形为薄盘状、内卷、弱压缩、极强包旋；旋环形态参数偏高（ww/dm≈0.40；uw/dm≈0.00），旋横切面参数为（ww/wh≈0.70；IZR≈0.45），旋环扩展率（WER）≈2.10