File:Simplified phylogeny spanning the fish–tetrapod transition.jpg
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editDescriptionSimplified phylogeny spanning the fish–tetrapod transition.jpg |
English: Figure 1 Simplified phylogeny spanning the fish–tetrapod transition, illustrating the major anatomical changes. Note the enormous enlargement of the ribcage and pelvis. Ribs are present in Eusthenopteron, but so small that they are difficult to see. The taxa are arranged from most aquatically adapted at the top to most terrestrially adapted at the bottom. In the colour coding, blue denotes an aquatic adaptation, and yellow to red colours represent adaptations for walking and weight support. The placement of Acanthostega crownward to Ichthyostega reflects its possession of a deltopectoral crest (see Fig. 2). Eusthenopteron modified from Jarvik (1980), Tiktaalik from Shubin et al. (2014), Acanthostega and Ichthyostega from Ahlberg et al. (2005a, b). |
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Source | https://www.cambridge.org/core/journals/earth-and-environmental-science-transactions-of-royal-society-of-edinburgh/article/follow-the-footprints-and-mind-the-gaps-a-new-look-at-the-origin-of-tetrapods/03CDF19859875BB5F43B6AB81C5E476A |
Author | Per E. AHLBERG |
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current | 23:38, 31 July 2022 | 1,400 × 1,201 (178 KB) | Ta-tea-two-te-to (talk | contribs) | Uploaded a work by Per E. AHLBERG from https://www.cambridge.org/core/journals/earth-and-environmental-science-transactions-of-royal-society-of-edinburgh/article/follow-the-footprints-and-mind-the-gaps-a-new-look-at-the-origin-of-tetrapods/03CDF19859875BB5F43B6AB81C5E476A with UploadWizard |
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File change date and time | 16:06, 18 October 2018 |
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Date and time of digitizing | 19:01, 6 February 2018 |
Date metadata was last modified | 00:06, 19 October 2018 |
Unique ID of original document | xmp.did:F77F117407206811A8B6AE2A8968281C |