Late silurian marine shelly fauna of Central and Northern Vietnam

The Late Silurian (late Ludlow-Pridoli) brachiopods and bivalves from North and Central Vietnam are described and illustrated from the Kien An (North Vietnam) and My Duc (Central Vietnam) localities. The biostratigraphic relations and age of the fauna, the so-called Retziella fauna, are discussed. T...

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Bibliographic Details
Published in:Geobios 2001, Vol.34 (3), p.315-338
Main Authors: Tong-Dzuy, T., Boucot, A.J., Rong, J.Y., Fang, Z.J.
Format: Article
Language:English
Subjects:
BIOGEOGRAPHY
BIOGÉOGRAPHIE
BIVALVES
BRACHIOPODES
BRACHIOPODS
Earth sciences
Earth, ocean, space
Exact sciences and technology
Invertebrate paleontology
LATE SILURIAN
NEW TAXA
NOUVEAUX TAXONS
Paleontology
SILURIEN SUPÉRIEUR
Stratigraphy
VIETNAM
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Summary:The Late Silurian (late Ludlow-Pridoli) brachiopods and bivalves from North and Central Vietnam are described and illustrated from the Kien An (North Vietnam) and My Duc (Central Vietnam) localities. The biostratigraphic relations and age of the fauna, the so-called Retziella fauna, are discussed. The My Duc fauna is the same as that at Kien An, indicating that during the Late Silurian both North Vietnam and Central Vietnam, situated on the South China and Indochina Plates respectively were probably fairly close geographically to each other. The Late Silurian is globally a time of moderately high, although not highest, provincialism as regards marine benthic invertebrates. A new brachiopod species, Nikiforovaena vietnamensis Boucot & Rong, and three new bivalve species Schizodus kienanensis Fang, S. ? myducensis Fang, and Modiomorpha paracrypta Fang are described. Les brachiopodes et les bivalves du Silurien supérieur (Ludlow terminal-Pridoli) des localités de Kien An (Nord Vietnam) et de My Duc (Centre Vietnam) sont décrits et figurés. L'âge de la faune à Retziella et les relations biostratigraphiques sont discutés. La faune de My Duc est la même que celle de Kien An, indiquent que pendant la fin du Silurien le Nord Vietnam et le Sud Vietnam, situés respectivement sur les plaques Sud-Chine et Indochine, étaient probablement assez proches l'une de l'autre. La fin du Silurien est globalement une période de provincialisme marqué, bien que n'étant pas le plus accentué, pour les invertébrés benthiques marins. Une nouvelle espèce de brachiopodes, Nikiforovaena vietnamensis Boucot & Rong, et trois nouvelles espèces de bivalves Schizodus kienanensis Fang, S. ? myducensis Fang, et Modiomorpha paracrypta Fang sont décrites.
ISSN:0016-6995
DOI:10.1016/S0016-6995(01)80079-6