File:Polarasterias janusensis (10.5852-ejt.2018.411) Figure 2.png
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[edit]DescriptionPolarasterias janusensis (10.5852-ejt.2018.411) Figure 2.png |
English: Fig. 2. Polarasterias janusensis Rousseau & Gale gen. et sp. nov. A–C. Holotype PMO 218.011a. A. Nearly complete specimen preserved in a cut-through fashion. B. Drawing detail from ambulacral groove showing ambulacrals, adambulacrals, adambulacral spines and scattered valves of forcipulate pedicellariae. C. Portion of arm illustrated in B, basal pieces of straight pedicellariae visible in cross section. D. Paratype PMO 217.982, oral region in actinal view. E. Paratype PMO 217.936, Arm tip showing terminal ossicle. F–G. Paratype PMO 218.069. F. Obliquely compressed radius showing adambulacrals, marginals, and columns of abactinal ossicles. G. Drawing detail from F. Abbreviations: abact = abactinal ossicle; adamb sp = adambulacral spine; adamb = adambulacral; amb = ambulacral; im = inferomarginal; ped bp = basal piece of pedicellariae; sm = superomarginal; sp = spine. |
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Source | Rousseau, J., Gale, A. S., & Thuy, B. (2018). New articulated asteroids (Echinodermata, Asteroidea) and ophiuroids (Echinodermata, Ophiuroidea) from the Late Jurassic (Volgian / Tithonian) of central Spitsbergen. European Journal of Taxonomy, (411). https://doi.org/10.5852/ejt.2018.411 | |||
Author | Rousseau, Gale & Thuy (2018) | |||
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current | 19:12, 4 August 2023 | 1,869 × 2,243 (7.42 MB) | Christian Ferrer (talk | contribs) | {{Information | description = {{en|1=Fig. 2. ''Polarasterias janusensis'' Rousseau & Gale gen. et sp. nov. A–C. Holotype PMO 218.011a. A. Nearly complete specimen preserved in a cut-through fashion. B. Drawing detail from ambulacral groove showing ambulacrals, adambulacrals, adambulacral spines and scattered valves of forcipulate pedicellariae. C. Portion of arm illustrated in B, basal pieces of straight pedicellariae visible in cross section. D. Paratype PMO 217.982, oral region in actinal... |
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