Table 5 in Late Viséan (Mississippian) ammonoids (Cephalopoda) from the Central Moroccan Meseta

Table 5. Conch ontogeny of Goniatites sphaericus (Sowerby, 1814) from Sidi Lamine. dmconch shapewhorl cross section shapewhorl expansion2 mmspindle-shaped; subinvolute (ww/dm ~ 1.10; uw/dm ~ 0.20)strongly depressed; very strongly embracing (ww/wh ~ 2.30; IZR ~ 0.55)low to mod. high (WER = 1.60–1.80)8 mmthickly globular to spindle-shaped; involute (ww/dm = 0.95– 1.10; uw/dm = 0.05)moderately to strongly depressed; extremely embracing (ww/wh = 1.80–2.20; IZR ~ 0.60)low (WER = 1.50–1.60)20 mmthickly pachyconic to thinly globular; involute (ww/dm = 0.80–0.95; uw/dm ~ 0.10)moderately depressed; extremely embracing (ww/wh ~ 1.90; IZR ~ 0.60)low (WER ~ 1.50)40 mmpachyconic; involute (ww/dm = 0.65–0.80; uw/dm ~ 0.15)moderately depressed; extremely embracing (ww/wh ~ 1.55; IZR ~ 0.60)low (WER ~ 1.50)