Table 107 in The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany)

Table 107. Conch ontogeny of Pseudarietites westfalicus Schmidt, 1924 from Oberrödinghausen.
dmconch shapewhorl cross section shapewhorl expansion5 mmthinly pachyconic; subevolutemoderately depressed; strongly embracingmoderate(ww/dm ~0.65; uw/dm ~0.35)(ww/wh ~1.75; IZR ~0.30)(WER ~1.75)10 mmthinly discoidal; subevoluteweakly depressed; moderately embracingmoderate(ww/dm ~0.44; uw/dm ~0.40)(ww/wh ~1.40; IZR ~0.25)(WER ~1.75)20 mmthinly discoidal; subevoluteweakly depressed; strongly embracinglow(ww/dm ~0.35; uw/dm ~0.40)(ww/wh ~1.10; IZR ~0.35)(WER ~1.70)