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Fig. 1 | BMC Ecology and Evolution

Fig. 1

From: Heads or tails first? Evolution of fetal orientation in ichthyosaurs, with a scrutiny of the prevailing hypothesis

Fig. 1

Details and overview of the in situ fetal material associated with female Mixosaurus cornalianus PIMUZ T 4830: A, detail of the articulated fetal vertebral columns and associated ribs in the posterior reproductive tract; B, magnified view of the two vertebrae shown in the box in A (An and Po denote fetal anterior and posterior); C, overview of the posterior portion of the maternal trunk, including the two fetal articulated vertebral columns and associated anterior girdle, limb and lower jaw elements (An and Po denote maternal anterior and posterior). Interpretations denoted by an apostrophe after their respective letter. Abbreviations: pp, parapophysis; vk, ventral keel

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BMC Ecology and Evolution

ISSN: 2730-7182

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