Table 20 in The pharciceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea)

Table 20. Conch ontogeny of Extropharciceras becheri (von Buch, 1832).
dmconch shapewhorl cross section shapewhorl expansion5 mmthinly pachyconic; evolute (ww/dm ~ 0.60; uw/dm ~ 0.45)strongly depressed; moderately embracing (ww/wh ~ 2.15; IZR ~ 0.30)low (WER ~ 1.55)10 mmthinly pachyconic; evolute (ww/dm ~ 0.70; uw/dm ~ 0.50)strongly depressed; strongly embracing (ww/wh ~ 2.30; IZR ~ 0.35)low (WER ~ 1.55)20 mmthinly pachyconic; evolute (ww/dm ~ 0.60; uw/dm ~ 0.45)moderately depressed; strongly embracing (ww/wh ~ 1.95; IZR ~ 0.35)low (WER ~ 1.60)40 mmthickly discoidal; subevolute (ww/dm ~ 0.50; uw/dm ~ 0.40)weakly depressed; strongly embracing (ww/wh ~ 1.45; IZR ~ 0.35)low (WER ~ 1.70)80 mmthinly discoidal; subevolute (ww/dm ~ 0.35; uw/dm ~ 0.35)weakly compressed; strongly embracing (ww/wh ~ 0.90; IZR ~ 0.35)moderate (WER ~ 1.80)