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A New Carcinosomatid Eurypterid From The Upper Silurian Of Northern Vietnam
Author(s) -
Braddy Simon J.,
Selden Paul A.,
Truong Doan Nhat
Publication year - 2002
Publication title -
palaeontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.69
H-Index - 63
eISSN - 1475-4983
pISSN - 0031-0239
DOI - 10.1111/1475-4983.00267
Subject(s) - paleontology , devonian , geology , peninsula , margin (machine learning) , paleozoic , biology , ecology , machine learning , computer science
A new carcinosomatid eurypterid, Rhinocarcinosoma dosonensis sp. nov., and Hughmilleria sp., are described from the Dô Son Formation of the Dô Son Peninsula, northern Vietnam. R. dosonensis is characterized by podomere 7 of prosomal appendage VI produced into an anterodistal spine, a metastoma with a cordate posterior margin, and an indented opisthosomal differentiation (i.e. preabdomen–postabdomen margin is concave). The Dô Son Formation was originally interpreted as Late Devonian (Givetian/Frasnian) in age but the unit containing the eurypterid assemblage is now considered much older (Late Silurian). A deltaic palaeoenvironmental setting is interpreted from biotic associations and sedimentological evidence.