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9 results for “Oecoptychius”
Fig. 10 in Morphological variations and geographic distribution of the rare Middle Jurassic ammonite Oecoptychius refractus
Fig. 10. Comparative dimensional proportions of various species of Oecoptychius Neumayr, 1878. Shaded areas display the range of variation in dimensional proportions.
Fig. 8 in Morphological variations and geographic distribution of the rare Middle Jurassic ammonite Oecoptychius refractus
Fig. 8. Strigoceratid ammonoid Oecoptychius refractus (Reinecke, 1818) m], SMNS 63457/1, from Ornatenton Formation, Kosmoceras jason Zone, Neidlingen, SW Germany, middle Callovian, Middle Jurassic. Note the strigations, a character noted only in well-preserved specimens and reminiscent of species attributed to Phlycticeras polygonium (Zieten, 1831) var. waageni [M] and considered herein to represent macroconch of O. refractus Reinecke, 1818).
Fig. 6 in Morphological variations and geographic distribution of the rare Middle Jurassic ammonite Oecoptychius refractus
Fig. 6. Strigoceratid ammonoid Oecoptychius refractus (Reinecke, 1818) [m] from Ogrodzieniec quarry, Quenstedtoceras lamberti Zone, upper Callovian. A. GIUS 8-3657/12 in lateral (A1), dorsal (A2), and dorsal (A3, note the ribbing pattern) views. B. GIUS 8-3657/5 in lateral (B1) and ventral (B2, B3, note the ribbing pattern) views. C. GIUS 8-3657/3 11 in lateral (C1), opposite lateral (C2), and ventral (C3) views. D. GIUS 8-3657/4 in lateral (D1), opposite lateral (D2), and ventral (D3, D4, note the ribbing pattern) views.
Fig. 5 in Morphological variations and geographic distribution of the rare Middle Jurassic ammonite Oecoptychius refractus
Fig. 5. Strigoceratid ammonoid Oecoptychius refractus (Reinecke, 1818) [m] from Ogrodzieniec quarry, Quenstedtoceras lamberti Zone, upper Callovian. A. GIUS 8-3657/9 in lateral (A1), dorsal (A2), ventral (A3), and dorsal (A4, note the ribbing pattern) views. B. GIUS 8-3657/10 in ventral view. C. GIUS 8-3657/11 in lateral (C1), opposite lateral (C2), ventral (C3), and dorsal (C4) views. D. GIUS 8-3657/2 in lateral (D1), opposite lateral (D2), ventral (D3), and dorsal (D4) views.
Fig. 4 in Morphological variations and geographic distribution of the rare Middle Jurassic ammonite Oecoptychius refractus
Fig. 4. Strigoceratid ammonoid Oecoptychius refractus (Reinecke, 1818) [m] from Ogrodzieniec quarry, Quenstedtoceras lamberti Zone, upper Callovian. A. GIUS 8-3657/1 in lateral (A1), opposite lateral (A2), ventral (A3), and dorsal (A4) views. B. GIUS 8-3657/6 in lateral (B1) and ventral (B2) views. C. GIUS 8-3657/7 in lateral view (C1), detail showing the smooth umbilical region (C2), opposite lateral (C3) and dorsal (C4) views. D. GIUS 8-3657/8 in lateral (D1), opposite lateral (D2), ventral (D3), and dorsal (D4) views.
Fig. 2 in Morphological variations and geographic distribution of the rare Middle Jurassic ammonite Oecoptychius refractus
Fig. 2. Lithostratigraphy and biostratigraphy at the Ogrodzieniec quarry (modified after Dembicz et al. 2006). Arrow shows the occurrence of Oecoptychius refractus (Reinecke, 1818) within the general stratigraphy of the Ogrodzieniec quarry. Bed numbers (1, 1a, 2, 3, 18, and 37) after Dembicz et al. (2006).
Fig. 9 in Morphological variations and geographic distribution of the rare Middle Jurassic ammonite Oecoptychius refractus
Fig. 9. Dimensional proportions of Oecoptychius refractus (Reinecke, 1818) [m]. The French and Polish specimens are compared with a reference point of the lectotype. A. Whorl height vs. shell diameter. B. Whorl thickness vs. shell diameter. C. Umbilicus vs. shell diameter. D. Whorl thickness vs. coiling ratio. For all given dimensional proportions, the French and Polish specimens form different groups.
Fig. 1. Geological map and the abandoned Ogrodzieniec quarry. A in Morphological variations and geographic distribution of the rare Middle Jurassic ammonite Oecoptychius refractus
Fig. 1. Geological map and the abandoned Ogrodzieniec quarry. A. Map showing the studied localities in Poland, western France, and Kachchh (western India). B. Map of France showing the position of St.-Laon and Montreuil-Bellay. C. Map of India showing the position of Kachchh. D. Map of Poland showing the the position of Ogrodzieniec. E. Detailed location of Ogrodzieniec quarry (modified after Jain and Mazur 2021). F. Geological map of the Polish Jura Chain showing the location of the studied Ogrodzieniec quarry. G. Aerial view of the Ogrodzieniec quarry; arrow marks the location of the studied section. H. Exposure of the studied section.
Fig. 3 in Morphological variations and geographic distribution of the rare Middle Jurassic ammonite Oecoptychius refractus
Fig. 3. Biostratigraphy of the studied section. A. Geological column, correlation of studied beds with these of Głowniak (2012) and the occurrence of specimens noted in the present study (modified after Jain and Salamon 2023). B. Field photo of the condensed bed where the studied specimens of Oecoptychius refractus (Reinecke, 1818) [m] were recorded. C. Close-up of the block with Quenstedtoceras lamberti (Q) and Hibolithes hastatus (H).
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