Ausichicrinites zelenskyyi

Description: English: Figure 2. Stratigraphy of the measured section at Mugher (Blue Nile Basin; figure 1c for the location of the section) marking the stratigraphic position of the crinoid sample (black arrow). Additionally, the black pentagon symbol marks the position of sample 2043b that has yielded upper Tithonian calcareous nannofossils (redrawn and modified after [21]). The depositional setting and inferred relative sea-level curve for the Mugher section is redrawn and slightly modified after Jain [20] and Jain & Singh [21]. Date: 20 July 2022. Source: Mariusz A. Salamon, Sreepat Jain, Tomasz Brachaniec, Piotr Duda, Bartosz J. Płachno and Przemysław Gorzelak (2022). Ausichicrinites zelenskyyi gen. et sp. nov., a first nearly complete feather star (Crinoidea) from the Upper Jurassic of Africa. Royal Society, Volume 9, Issue 7. doi:10.1098/rsos.220345. Author: Mariusz A. Salamon, Sreepat Jain, Tomasz Brachaniec, Piotr Duda, Bartosz J. Płachno and Przemysław Gorzelak.

Description: English: Figure 1. Geological and locality map. (a) Geological map of Ethiopia showing the three sedimentary basins, Ogaden, Blue Nile and Mekele (redrawn and slightly modified after [23]). (b) Major Jurassic localities mentioned in the text from Ethiopia, Somalia and Yemen. The shaded part in (b) (within Ethiopia) is enlarged in (c). (c) Locality map of the measured section at Mugher and the reference section at Dejen for the Blue Nile Basin (mentioned in the text). (b) and (c) are redrawn and modified after Jain. Date: 20 July 2022. Source: Mariusz A. Salamon, Sreepat Jain, Tomasz Brachaniec, Piotr Duda, Bartosz J. Płachno and Przemysław Gorzelak (2022). Ausichicrinites zelenskyyi gen. et sp. nov., a first nearly complete feather star (Crinoidea) from the Upper Jurassic of Africa. Royal Society, Volume 9, Issue 7. doi:10.1098/rsos.220345. Author: Mariusz A. Salamon, Sreepat Jain, Tomasz Brachaniec, Piotr Duda, Bartosz J. Płachno and Przemysław Gorzelak.

Description: English: Figure 4. Ausichicrinites zelenskyyi gen. et sp. nov. from the upper part of the Antalo Limestone Formation (38°22'49.1″ E; 9°28'41.8″ N; 2114 m elevation), 21 m above the upper Tithonian calcareous nannofossil-yielding sample 2043b, Ethiopia (see also figure 2 for its stratigraphic position). Scale bar equals 10 mm (a,c,e,f,g) and 1 mm (b,d,h,i). (a,c). Specimen with centrodorsal, arms and cirri ((a) non-whitened, (c) whitened) with magnifications (b,d) of IBr2 articulation (note a ‘dotted’ suture line (red arrows) from the outer surface of the articulation (b) and a fine ridge (red arrows) on the partly exposed facet (d)). (e) Lateral view showing a centrodorsal (non-whitened). (f,g) Tomographic images of slices of the fossil comatulids showing cryptosyzygial articulation at IBr2 (red arrows). (h) Proximal pluricirral (lateral view) and isolated cirri (facet view, blue arrow). (i) Regenerating pinnules consisting of one to three pinnular plates (blue arrows). Date: 20 July 2022. Source: Mariusz A. Salamon, Sreepat Jain, Tomasz Brachaniec, Piotr Duda, Bartosz J. Płachno and Przemysław Gorzelak (2022). Ausichicrinites zelenskyyi gen. et sp. nov., a first nearly complete feather star (Crinoidea) from the Upper Jurassic of Africa. Royal Society, Volume 9, Issue 7. doi:10.1098/rsos.220345. Author: Mariusz A. Salamon, Sreepat Jain, Tomasz Brachaniec, Piotr Duda, Bartosz J. Płachno and Przemysław Gorzelak.