Table 7 in Late Viséan (Mississippian) ammonoids (Cephalopoda) from the Central Moroccan Meseta

Table 7. Conch ontogeny of Goniatites spirifer Roemer, 1850 from the Winterberg near Bad Grund (Harz Mountains, Germany). dmconch shapewhorl cross section shapewhorl expansion2 mmspindle-shaped; subinvolute (ww/dm ~ 1.20; uw/dm ~ 0.20)strongly depressed; very strongly embracing (ww/wh ~ 2.60; IZR ~ 0.55)low (WER ~ 1.60)8 mmthickly globular; involute (ww/dm ~ 0.95; uw/dm = 0.05)moderately depressed; extremely embracing (ww/wh ~ 1.90; IZR ~ 0.55)moderately high (WER ~ 1.85)20 mmthinly globular; involute (ww/dm ~ 0.90; uw/dm ~ 0.05)moderately depressed; extremely embracing (ww/wh ~ 1.65; IZR ~ 0.55)low (WER ~ 1.65)40 mmpachyconic; involute (ww/dm ~ 0.80; uw/dm ~ 0.12)moderately depressed; extremely embracing (ww/wh ~ 1.60; IZR ~ 0.60)very low (WER ~ 1.50)