54 research outputs found
New data on the Silurian-Devonian paleontology and biostratigraphy of Bolivia
P. 269-314In order to precisely establish the bio- and chronostratigraphic position of several levels of the Silurian–Devonian succession
of Bolivia, with respect to the International Time Scale, additional Silurian and Devonian localities belonging to
the Eastern Cordillera and the Interandean Zone areas have been recently revised and sampled, both for macrofossils and
palynomorphs. Specifically, the localities are Ñuñumayani, and Muruhuta from the late Silurian–early Devonian time
interval. Correlations with other fossiliferous localities are discussed, namely Huacallani and Rumicorral.S
Early carboniferous brachiopod faunas from the Baoshan block, west Yunnan, southwest China
38 brachiopod species in 27 genera and subgenera are described from the Yudong Formation in the Shidian-Baoshan area, west Yunnan, southwest China. New taxa include two new subgenera: Unispirifer (Septimispirifer) and Brachythyrina (Longathyrina), and seven new species: Eomarginifera yunnanensis, Marginatia cylindrica, Unispirifer (Unispirifer) xiangshanensis, Unispirifer (Septimispirifer) wafangjieensis, Brachythyrina (Brachythyrina) transversa, Brachythyrina (Longathyrina) baoshanensis, and Girtyella wafangjieensis. Based on the described material and constraints from associated coral and conodont faunas, the age of the brachiopod fauna from the Yudon Formation is considered late Tournaisian (Early Carboniferous), with a possibility extending into earlyViseacutean.<br /
Carboniferous and Permian Rugosochonetidae (Brachiopoda) from West Spitsbergen
The rugosochonetid brachiopod species Lissochonetes geinitzianus from the Kazimovian of the Nordenskioldbreen Formation, and Dyoros (Dyoros) mucronata sp. nov., Dyoros (Dyoros) spitzbergianus and Lissochonetes superba from the Artinskian to latest Permian Kapp Starostin Formation in West Spitsbergen are described and figured. Dyoros is generally restricted to the Boreal Realm, whereas Lissochonetes is mostly distributed in the Boreal Realm, but occasionally present in the Palaeoequatorial and Gondwanan Realms<br /
Meristella renaudae n. sp., nouveau Meristelliné (Athyridina, Brachiopoda) du gédinnien inférieur du massif armoricain
National audienc
Meristella renaudae n. sp., nouveau Meristelliné (Athyridina, Brachiopoda) du gédinnien inférieur du massif armoricain
National audienc
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