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File:Psammaster davidsoni (10.5194-fr-23-141-2020) Figure 3.png

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English: Figure 3. Arrangement of the body wall and arm ossicles of Psammaster davidsoni (a, b, c, d) and the ambulacral groove (e, f). Photographs (a, c, e) and interpretation drawings (b, d, f) of the lectotype NHMUK PI E 53996. Dashed lines indicate uncertain contour of the ossicles. Coloured areas indicate ossicle homology. In orange: the central ossicle; in red: the madreporite; in green: carinals; in pink: abactinals; in blue: superomarginals; in yellow: inferomarginals; in brown: actinals; in grey: ambulacrals; in purple: adambulacrals; in teal: adambulacrals spines. Scale bars: 5 mm.
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Source Fau M., Villier L. Ewin T.A.M., Gale A.S. (2020). A revision of Ophidiaster davidsoni de Loriol and Pellat 1874 from the Tithonian of Boulogne (France) and its transfer from the Valvatacea to the new forcipulatacean genus Psammaster gen. nov. Fossil Record. 23(2): 141–149. https://doi.org/10.5194/fr-23-141-2020
Author Fau M., Villier L. Ewin T.A.M., Gale A.S. (2020)
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current19:22, 17 December 2022Thumbnail for version as of 19:22, 17 December 20222,067 × 2,575 (1.12 MB)Christian Ferrer (talk | contribs){{Information | description = {{en|1=Figure 3. Arrangement of the body wall and arm ossicles of ''Psammaster davidsoni'' (a, b, c, d) and the ambulacral groove (e, f). Photographs (a, c, e) and interpretation drawings (b, d, f) of the lectotype NHMUK PI E 53996. Dashed lines indicate uncertain contour of the ossicles. Coloured areas indicate ossicle homology. In orange: the central ossicle; in red: the madreporite; in green: carinals; in pink: abactinals; in blue: superomarginals; in yellow:...

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