Revision of Dugastella nitida n. comb. (Crustacea: Decapoda: Atyidae), a freshwater shrimp from the Oligocene of Aix-en-Provence
Articles à la une 12 déc 2024
Revision of Dugastella nitida n. comb. (Crustacea: Decapoda: Atyidae), a freshwater shrimp from the Oligocene of Aix-en-Provence
de Mazancourt, V., & Audo, D. (2024). Revision of Dugastella nitida n. comb. (Crustacea: Decapoda: Atyidae), a freshwater shrimp from the Oligocene of Aix-en-Provence. Geodiversitas, 46(19), 967–977. https://doi.org/10.5252/GEODIVERSITAS2024V46A19
L’espèce de crevette fossile Caridina nitida A. Milne-Edwards, 1879 provenant des sédiments lacustres d’Aix-en-Provence et datant de l’Oligocène était considérée comme nomen dubium. À partir de nouveaux spécimens découverts dans la localité type, nous proposons une re-description illustrée de cette espèce. L’étude morphologique nous conduit à la placer au sein du genre actuel Dugastella Bouvier, 1912. Ces nouvelles données renforcent l’hypothèse d’un paléoenvironnement dulcicole à légèrement saumâtre. L’holotype de A. Milne-Edwards a été retrouvé dans les collections du Muséum national d’Histoire naturelle mais la crevette fossile n’étant pas visible (détruite), un néotype est désigné parmi les nouveaux spécimens décrits.
The fossil shrimp species Caridina nitida A. Milne-Edwards, 1879 described from the Oligocene la- custrine deposits of Aix-en-Provence was considered to be a nomen dubium. Based on newly discovered specimens at the type locality, we provide an illustrated re-description of this species. The detailed morphological study leads us to place C. nitida within the extant genus Dugastella Bouvier, 1912. These new data support the hypothesis of a fresh to slightly brackish palaeoenvironment. A specimen possibly corresponding to A. Milne-Edward’s holotype was found in the collections of the Muséum national d’Histoire naturelle but since the fossil shrimp is not visible anymore (destroyed), a neotype is designated among the new specimens.
Contact : Valentin de Mazancourt, valentin.demazancourt_ext@mnhn.fr
The fossil shrimp species Caridina nitida A. Milne-Edwards, 1879 described from the Oligocene la- custrine deposits of Aix-en-Provence was considered to be a nomen dubium. Based on newly discovered specimens at the type locality, we provide an illustrated re-description of this species. The detailed morphological study leads us to place C. nitida within the extant genus Dugastella Bouvier, 1912. These new data support the hypothesis of a fresh to slightly brackish palaeoenvironment. A specimen possibly corresponding to A. Milne-Edward’s holotype was found in the collections of the Muséum national d’Histoire naturelle but since the fossil shrimp is not visible anymore (destroyed), a neotype is designated among the new specimens.
Contact : Valentin de Mazancourt, valentin.demazancourt_ext@mnhn.fr