Table 7 in The pharciceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea)

Table 7. Conch ontogeny of Pharciceras tridens (Sandberger & Sandberger, 1850).
dmconch shapewhorl cross section shapewhorl expansion30 mmthinly discoidal; subevolute (ww/dm ~ 0.45; uw/dm ~ 0.42)weakly depressed; moderately embracing (ww/wh ~ 1.45; IZR ~ 0.25)low (WER ~ 1.70)50 mmthinly discoidal; subevolute (ww/dm ~ 0.40; uw/dm ~ 0.40)weakly depressed; moderately embracing (ww/wh ~ 1.20; IZR ~ 0.25)moderate (WER ~ 1.75)