Conodont zonal species from the delta and pesavis Zones (Lower Devonian) in central Nevada

Amydrotaxis is a new multielement genus that includes A. johnsoni and one species in open nomenclature. A. johnsoni alpha morphotype (= Ozarkodina n. sp. C of former usage) ranges from the base of the delta Zone up into the pesavis Zone, and A. johnsoni beta morphotype ranges from just below the top of the delta Zone well up into the pesavis Zone in central Nevada. Ozarkodina delta n. sp. (= O. n. sp. D of previous usage) is restricted to the delta Zone in Cordilleran North America.