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Protaspides of Leiostegium and their implications for membership of the order Corynexochida
Author(s) -
Lee DongChan,
Chatterton Brian D. E.
Publication year - 2003
Publication title -
palaeontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.69
H-Index - 63
eISSN - 1475-4983
pISSN - 0031-0239
DOI - 10.1111/1475-4983.00306
Subject(s) - ordovician , paleontology , order (exchange) , inclusion (mineral) , geology , geography , biology , mineralogy , finance , economics
Protaspid morphologies of Leiostegium sp. aff. L. formosum from the Lower Ordovician Garden City Formation, western United States strongly support the inclusion of the Leiostegiina in the order Corynexochida. A similar metaprotaspid morphotype is present in the three suborders of the Corynexochida, the Corynexochina, Leiostegiina, and Illaenina, supporting their corynexochid membership.