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Langella smaller foraminifera fauna from south china and its stratigraphic significance



Langella smaller foraminifera fauna from south china and its stratigraphic significance



Acta Micropalaeontologica Sinica 5(3): 275-281



The genus Langella was renamed by S. de Civrieus and T. F. J. Dessauvagie in 1965. Padangia is a senior synonym of Langella and was first reported by Lange (1925) from the Middle Permian in the Padanger region of Indonesia. The Langella fauna is widely distributed in the Tethys province in the Permian period. The genus Langella is most abundant both in individuals and in species in the Early Permian. The species of Langella described and figured in the present paper were found in the basal part of the Chihsia Stage of the Lower Permian from Jiangsu, Anhui, Jiangxi, Hunan, Guizhou, Guangxi, Shaanxi and Sichuan. The Langella zone is established by the author in this paper. The new foraminiferal zone may be regarded as the lowermost fossil zone of the Chinsia Stage of the Lower Permian. The Langella fauna contains 10 species described in the present paper. Among them, 6 species are new and 1 species remains indeterminable. They are: Langella perforata (Lange), L. lepidia sp. nov., L. elongata sp. nov., L. planocamerata sp. nov., L. minima sp. nov., L. fragilis (S. de C. et Dess.), L. cf. cukurkoyi S. de C. et Dess., L. kongshanensis sp. nov., L. delicata sp. nov. and Langella sp. The genus Langella made its first appearance in the Kungurian Stage from the western Ural of the USSR. Therefore, from the foraminiferal point of view, the Kungurian Stage of the western Ural corresponds probably to the Chihsia Stage of South China.

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