Trilobites at the base of the Middle Ordovician, western United States

R. A. Fortey, and M.L. Droser

1996

Article

Journal of Paleontology 70(1):73-991

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Taxa discussed in this work:

• Ectenonotus progenitor
• Goniotelina ensifer
• Kanoshia reticulata
• Madaraspis
• Madaraspis magnifica
• Petigurus inexpectatus
• Psephosthenaspis glabrior
• Psephosthenaspis microspinosa
• Pseudomera arachnopyge
• Pseudoolenoides aspinosus

Taxonomy:

• Goniotelina ensifer belongs to Goniotelina - Fortey and Droser (1996)
• Petigurus inexpectatus belongs to Petigurus - Fortey and Droser (1996)
• Ludvigsenella belongs to Psephosthenaspis - Fortey and Droser (1996)
• Psephosthenaspis pseudobathyurus belongs to Psephosthenaspis - Fortey and Droser (1996)
• Psephosthenaspis microspinosa belongs to Psephosthenaspis - Fortey and Droser (1996)
• Psephosthenaspis glabrior belongs to Psephosthenaspis - Fortey and Droser (1996)
• Pseudoolenoides aspinosus belongs to Pseudoolenoides - Fortey and Droser (1996)
• Madaraspis magnifica belongs to Madaraspis - Fortey and Droser (1996)
• Ectenonotus progenitor belongs to Ectenonotus - Fortey and Droser (1996)
• Kanoshia reticulata belongs to Kanoshia - Fortey and Droser (1996)
• Pseudomera arachnopyge belongs to Pseudomera - Fortey and Droser (1996)
• Psephosthenaspis ellipsepyga belongs to Psephosthenaspis - Fortey and Droser (1996)