Paleoecology and paleobiogeography of Paleocene ostracods in Dineigil area, South Western Desert, Egypt

Paleobiogeographic affinities and paleoecological significance of paleogene ostracods from Eastern Benin Basin, Southwestern Nigeria

“…Ostracods were recovered from the residues under binocular reflected light microscope. Species were identified using published photomicrographs in Morsi and Speijer (2003) and Youssef et al (2017).…”

“…The distribution of ostracod assemblages are controlled by water mass conditions which include depth, temperature, turbulence and dissolved oxygen content (Youssef et al, 2017).…”

“…The ostracod assemblages of the RC-4 are characteristic of Paleogene warm water inner to middle shelf meiobenthic communities (Morsi et al, 2011;Youssef et al, 2017). Some taxa such as Bairdia ilaroensis, Leguminocythereis lokossaensis, Paracosta parakefensis, Oertliella posterotriangulata and Ordoniya bulaqensis are restricted to inner -outer shelf settings (Morsi et al, 2011).…”

“…Some of the ostracod species (e.g. Bairdia ilaroensis, Leguminocythereis lokossaensis and Paracosta kefensis) from the RC-4 Hole have wide paleogeographic distribution along the West African coast through Mali to Egypt and the Southern Tethys region suggesting faunal exchange between the two regions (Reyment and Reyment, 1980;Elewa, 2002, Morsi andSpeijer, 2003;Youssef et al, 2017). Foraminiferal data from Speijer et al, (1996) and Adebambo et al, (2022) also indicated foraminiferal faunal similarity between the two provinces thereby lending credence to the presence of a link between the provinces during the Paleocene -Eocene epoch.…”

“…Ostracod assemblag es are proxies to understanding certain ecological / paleoecological conditions such as depth, temperature, turbulence, dissolved oxygen content (Youssef et al, 2017) and are excellent indicators of ancient seaways (Elewa, 2002;Morsi et al, 2011;Youssef et al, 2017). The assemblages of West African basins have been compared to those of North Africa.…”