Table 13 in The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany)

Table 13. Conch ontogeny of Paragattendorfia sphaeroides Weyer, 1972.
dmconch shapewhorl cross section shapewhorl expansion2 mmspindle-shaped; subinvolutevery strongly depressed; very stronglylow(ww/dm ~1.15; uw/dm ~0.15)embracing (ww/wh ~2.50; IZR ~0.55)(WER ~1.55)8 mmthickly globular; subinvolutevery strongly depressed; very stronglyvery low(ww/dm ~1.05; uw/dm ~0.20)embracing (ww/wh ~2.60; IZR ~0.65)(WER ~1.40)20 mmthickly pachyconic; subinvolutemoderately depressed; very stronglyvery low(ww/dm ~0.80; uw/dm ~0.20)embracing(WER ~1.45)(ww/wh ~1.70; IZR ~0.60)