Northwestern Montana (Powell Co.) - Resser 1935
The Gordon Shale is overlain conformably in northwestern Montana by the Damnation Limestone.
Trilobites:
Albertella helena
Walcott, 1908
Alokistocare charax (Walcott) (formerly
Ptychoparia? charax Walcott)
Amecephalus
gordonensis (Resser, 1935) (formerly Strotocephalus gordonensis)
Anoria baton Walcott, 1916b
Clavaspidella bela
Glossopleura belesis (Walcott, 1916)
Kochina americana (Walcott, 1912) (formerly Olenopsis americanus
Walcott, 1912)
Ptarmingia gordonensis Resser
Ptychoparella
candace (Walcott) (formerly Elrathina candace and Ptychoparia
candace)
Ptychoparella pylas (formerly Elrathina pylas and Ptychoparia
pylas)
Vanuxemella contracta Walcott,
1916a
Zacanthoides cnopus Walcott, 1917
REFERENCES:
Deiss,Charles (1939) Cambrian Stratigraphy and Trilobites of Northwestern Montana. The Geological Society of America, Special Papers, Number 18
Resser, C.E. (1935) Nomenclature of some Cambrian Trilobites, Smithsonian, Misc. Coll.., Vol. 93, No. 5, P. 1-46
*researched and compiled by George Ast and James Cook
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