The Bennettitalean leaf "Zamites" Powellii from the Middle Triassic Moenkopi Formation, east-central New Mexico
— Spencer G. Lucas
Two localities in Middle Triassic (lower Anisian) strata of the Moenkopi Formation (Anton Chico Member) in east-central New Mexico yield numerous fossils of the bennettitalean "Zamites" powellii Fontaine. This record extends the temporal distribution of "Z" powellii from the late Carnian to the early Anisian, eliminating its use as a late Carnian index taxon. It also indicates that at least one Triassic benneltitalean taxon has a longer temporal range than previously known, and that the diversity of Middle Triassic bennettitaleans is not well documented.
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- Lucas, Spencer G., 2001, The Bennettitalean leaf "Zamites" Powellii from the Middle Triassic Moenkopi Formation, east-central New Mexico, in: Geology of the Llano Estacado, Lucas, Spencer G.; Ulmer-Scholle, Dana S., New Mexico Geological Society, Guidebook, 52nd Field Conference, pp. 111-114.