. Fig. 360. Die phylogenetische Entwicklung der Schwanzflosse bei den Ichthyosauriern. A. Mixosaurus Nordenskjöldi Wiman. Trias (Muschelkalk) von Spitzbergen. (Nach C. Wiman, 1910.) Ichthyosaurus (Stenopterygius) qua- driscissus, Quenst., Jugendstadium. Oberer Lias(e) Württembergs. (Nach E. Fraas, 1911.) C. Dieselbe Art, erwachsenes Exemplar. Ebendaher. (Nach E. Fraas, 1910.) D. Ichthyosaurus trigonus, var. posthu- mus. Oberer weißer Jura (Tithon) von Solnhofen, Bayern. (Nach F. Bauer, 1898.) (Nach E. Fraas

. Fig. 360. Die phylogenetische Entwicklung der Schwanzflosse bei den Ichthyosauriern. A. Mixosaurus Nordenskjöldi Wiman. Trias (Muschelkalk) von Spitzbergen. (Nach C. Wiman, 1910.) Ichthyosaurus (Stenopterygius) qua- driscissus, Quenst., Jugendstadium. Oberer Lias(e) Württembergs. (Nach E. Fraas, 1911.) C. Dieselbe Art, erwachsenes Exemplar. Ebendaher. (Nach E. Fraas, 1910.) D. Ichthyosaurus trigonus, var. posthu- mus. Oberer weißer Jura (Tithon) von Solnhofen, Bayern. (Nach F. Bauer, 1898.) (Nach E. Fraas Stock Photo
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