The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany) Author Korn, Dieter 286CA4F3-7EBC-4AEF-A66A-B2508D001367 Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Invalidenstrasse 43, 10115 Berlin, Germany. dieter.korn@mfn.berlin Author Weyer, Dieter A09A1738-C70E-4F22-A069-8B7DB4A1753D Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Invalidenstrasse 43, 10115 Berlin, Germany. dieter.weyer@t-online.de text European Journal of Taxonomy 2023 2023-07-19 882 1 230 http://dx.doi.org/10.5852/ejt.2023.882.2177 journal article 58033 10.5852/ejt.2023.882.2177 57d1d191-2bf5-4229-a0f5-9ab472a114a6 2118-9773 8177581 67C909E4-C700-4F8D-B8CE-5FD9B2C5D549
Table 3. Conch ontogeny of Mimimitoceras perditum sp. nov.
dmconch shapewhorl cross section shapewhorl expansion
2 mmthinly to thickly globular; involute to subinvolute (ww/dm = 0.85–1.00; uw/dm = 0.10–0.20)moderately to strongly depressed; very strongly embracing (ww/wh = 1.70–2.10; IZR = 0.55–0.60)low (WER = 1.50–1.75)
8 mmthickly pachyconic; involute (ww/dm = 0.75– 0.85; uw/dm = 0.02–0.05)moderately depressed; very strongly embracing (ww/wh = 1.50–1.60; IZR = 0.60–0.70)low (WER = 1.50–1.55)
20 mmthinly pachyconic; involute (ww/dm ~0.70; uw/dm ~0.02)weakly depressed; very strongly embracing (ww/wh ~1.30; IZR ~0.65)low (WER = 1.50–1.65)
40 mmthinly pachyconic; involute (ww/dm ~0.60; uw/dm ~0.02)weakly depressed; very strongly embracing (ww/wh = 1.20–1.30; IZR = 0.60–0.65)low (WER ~1.70)
60 mmthiclly discoidal; involute (ww/dm ~0.55; uw/dm ~0.02)weakly compressed; very strongly embracing (ww/wh ~0.95; IZR ~0.60)low (WER ~1.70)