File:Scheuchzer 1702 Spec Lit Helv Cur Figs 27 & 28.png

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English: Historical drawings of aptychi (i.e. calcified lower jaws of ammonites that possibly served as cap for the opening of the shell when the soft body was retreated) from the Upper Jurassic of NW Switzerland, figured and described as bivalve shells (“Tellinoides”) in this work. According to Trauth (1931)[1] these drawings show specimens of Laevaptychus longus (Meyer 1829) in external (top) and internal (bottom) views.
Deutsch: Historische Zeichnungen von Aptychen (d.h. verkalkten Unterkiefern von Ammoniten, die möglicherweise als Gehäusedeckel dienten) aus dem Oberjura der Nordwest-Schweiz, abgebildet und beschrieben in dieser Arbeit als Muschelklappen („Tellinoides“). Trauth (1931)[1] zufolge zeigen diese Zeichnungen Exemplare von Laevaptychus longus (Meyer 1829) mit Blick auf die Außen- (oben) und Innenfläche (unten).
  1. ↑ a b Friedrich Trauth (1931): Aptychenstudien. VI–VII. Annalen des Naturhistorischen Museums in Wien 45:18–136 (PDF 10,7 MB), see p. 40 therein.
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Source Figs. 27 and 28 of plate 2 in Specimen Litographiæ Helveticæ Curiosæ. Printed by David Gessner, Zurich 1702, doi:10.3931/e-rara-12116
Author Johann Jakob Scheuchzer (1672-1733); modified by Gretarsson
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current20:18, 23 February 2017Thumbnail for version as of 20:18, 23 February 2017645 × 640 (261 KB)Gretarsson (talk | contribs)higher resolution, retouched, brightness & contrast enhanced
20:16, 23 February 2017Thumbnail for version as of 20:16, 23 February 2017351 × 380 (222 KB)Gretarsson (talk | contribs)File:Scheuchzer 1711 Spec Lit Helv Cur Figs 17-28.png cropped 68 % horizontally and 75 % vertically using CropTool with precise mode.

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