Article: Protaspides of Leiostegium and their implications for membership of the order Corynexochida
Publication: Palaeontology
Volume:
46
Part:
3
Publication Date:
May
2003
Page(s):
431
–
445
Author(s):
Dong-Chan Lee and Brian D. E. Chatterton
Abstract
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.