Just out | Ammonoids from the late Givetian Taouzites Bed of Ouidane Chebbi (eastern Tafilalt, SE Morocco) @ Neues Jahrbuch für Geologie und Paläontologie – Abhandlungen


Just out @ Neues Jahrbuch für Geologie und Paläontologie – Abhandlungen


Ammonoids from the late Givetian Taouzites Bed of Ouidane Chebbi (eastern Tafilalt, SE Morocco)


Author(s)

Bockwinkel, Jürgen; Becker, Ralph Thomas; Aboussalam, Zhor Sarah


Abstract:

A marly, nodular limestone bed at Ouidane Chebbi in the eastern Tafilalt (eastern ramp of the Tafilalt Platform, SE Morocco) yielded a rich and diverse ammonoid fauna of the late Givetian Taouzites taouzensis Zone (MD III-D), which falls in the higher part of the Polygnathus dengleri sagitta Subzone of the conodont succession. There are seventeen species of twelve ammonoid genera, which include several new taxa: Pharciceras elevatum n. sp., Ph. concurrens n. sp., Oxypharciceras chebbiense n. gen. n. sp., Extropharciceras worki n. sp., Allopharciceras maximum n. gen. n. sp., and A. kirchgasseri n. gen. n. sp. The most common forms are Pseudoprobeloceras pernai, Taouzites taouzensis, and Synpharciceras clavilobum. The comparison with contemporaneous faunas of the adjacent Tafilalt and Maider basins shows a different faunal composition, characterized by the new genera and species, as well as by the rarity/absence of Lunupharciceras and otherwise common species of Pharciceras and Extropharciceras. This difference probably reflects the different bottom water oxygenation and meso- versus eutrophic conditions, rather than just water depth. Apart from three species, our Ouidane Chebbi fauna is also very different from that of the underlying Syn. clavilobum Zone (MD III-C) of the central Tafilalt Platform. This significant extinction coincides with a marked regional regression.


Keywords: Ammonoids; Conodonts; Devonian; Givetian; Morocco; Palaeoecology; Systematics; Taxonomy


DOI: 10.1127/njgpa/2017/0664


READ IT HERE: http://www.ingentaconnect.com/content/schweiz/njbgeol/2017/00000284/00000003/art00005


Explore further

Morocco Placeholder
Morocco
Oceans and Antarctica Overlay_small _blank Placeholder
Oceans and Antarctica Overlay_small _blank
Read more about / Morocco
Read more about / Africa
Read more about / Devonian
Read more about / Paleozoic
Read more about / Invertebrate Paleontology
Read more about / Today in Publishing

Browse through Time


 Image Credit: fossilmuseum.net

Lurdes Fonseca

Assistant Professor and Researcher at University of Lisbon
Sociologist (PhD), Paleontologist (Researcher in Micropaleontology), Majors in Sociology and Biology, Minor in Geology. Main interests in Paleontology: Microfossils, Molecular fossils, Paleobiology and Paleoecology. (read more about me)