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Swiss Journal of Geosciences
Fig. 3 | Swiss Journal of Geosciences

Fig. 3

From: Functional morphology of Grammatodon inaequivalvis (Goldfuss) and implications for evolutionary pathways in arcoidean bivalves

Fig. 3

Grammatodon inaequivalvis (Goldfuss) from the Opalinuston Formation of Southern Germany. a Cross section (SMNS 67139/1, Balingen, Early Aalenian). b Front view (SMNS 67138/1, Weilerstoffel, Early Aalenian). Indentations of the right valve are marked with arrows. c Posterior view and cross section of the ventral shell margin of Scapharca brasiliana (Lamarck) (NMB 1043 l, Los Gallos Pt., Trinidad, recent). d Posterior view and cross section of the ventral shell margin of Cucullaea concamerata (Martini) (NMB 277 b, Macao, China, recent). All scale bars are 1 cm

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