Debrunia occitanica nov. sp. (Monopleuridae) from the Early Aptian of SE France

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Turkish Journal of Earth Sciences
Volume:19 Issue:5
Debrunia occitanica nov. sp. (Monopleuridae) from the Early Aptian of SE France

Debrunia occitanica nov. sp. (Monopleuridae) from the Early Aptian of SE France

Authors : Géosystèmes CARBONATÉS, Université De PROVENCE, Marseille CEDEX

Pages : 573-581

Doi:10.3906/sag-1202-53

View : 22 | Download : 11

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Debrunia occitanica nov. sp., described from the early Aptian platform limestones of SE France, is characterized by: a moderately convex left valve, inconspicuous radial bands and a ligament groove in a depression flanked by two longitudinal rounded edges. Debrunia occitanica nov. sp. is considered as a chronospecies belonging to a single lineage rooted in the Barremian, and including Debrunia bruni and Debrunia mutabilis. Evolutionary trends in the three species include flattening of the left valve, development of the corresponding myophores, and reduction of the radial bands. This new species has the potential to be a stratigraphic marker for the early Aptian.
Keywords : Turkish J Earth Sci, 19, 2010, 573 581 Turkish J Earth Sci, vol 19, iss 5

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