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Linshuichonetes gen. nov., a new rugosochonetid (Brachiopoda) genus from the Liangshan Formation (Early Permian) in Sichuan, China, and its ecology

Campi, Monica and Shi, Guang Rong 2002, Linshuichonetes gen. nov., a new rugosochonetid (Brachiopoda) genus from the Liangshan Formation (Early Permian) in Sichuan, China, and its ecology, Acta palaeontologica Sinica, vol. 41, no. 1, pp. 105-118.

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Title Linshuichonetes gen. nov., a new rugosochonetid (Brachiopoda) genus from the Liangshan Formation (Early Permian) in Sichuan, China, and its ecology
Author(s) Campi, Monica
Shi, Guang RongORCID iD for Shi, Guang Rong orcid.org/0000-0002-5126-4036
Journal name Acta palaeontologica Sinica
Volume number 41
Issue number 1
Start page 105
End page 118
Publisher Gu sheng wu xue bao bian ji wei yuan hui
Place of publication Beijing, China
Publication date 2002-01
ISSN 0001-6616
Keyword(s) Brachiopoda
Linshuichonetes gen. nov
ecology
Early Permian
Sichuan
Summary A new genus and species, Linshuichonetes elfinis, belonging to the Rugosochonetidae, is described from the Early Permian (Late Artinskian or early Kungurian) Liangshan Formation of the Yangtze block. The new genus is defined externally by the presence of fine, but delayed, capillation and a weak or absent median sulcus and fold and by the presence of a distinct posteromedian sinus on the ventral umbo; and internally by a lack of median, lateral and accessory septa in the dorsal interior; absence of vascular trunks in the ventral interior and the presence of distinct radiating rows of papillae in the interior of both valves, particularly an unusual clustered arrangement of papillae on the posteromedian portion of the dorsal interior. The local environment during the deposition of the Liangshan Formation appears to have been a restricted tidal flat or lagoon which experienced frequent sealevel fluctuations associated with the onset of the Yanghsingian transgression. The new species, L. elfinis, appears to have several morphological adaptations enabling successful exploitation of this environment. It was typically a very small and thin-valved species with a high surface area to volume ratio, an advantage in an oxygen restricted environment. The small size and numerous body spinules would have aided individuals to remain suspended at the top of the fine, soft substrate. It also dominated the brachiopod assemblage in the Liangshan Formation, comprising up to 94%of specimens within a bed. These factors indicate that the new species appears to be an opportunistic species.
Language eng
Field of Research 040311 Stratigraphy (incl Biostratigraphy and Sequence Stratigraphy)
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30001479

Document type: Journal Article
Collection: School of Ecology and Environment
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