An unusual new species of Dicranophyllum grand'eury from the Virgilian (Upper Pennsylvanian) of New Mexico, U.S.A.

Sergius H. Mamay

doi:10.54991/jop.1981.1404

Authors

Sergius H. Mamay U.S. Geological Survey, E-501, U.S. National Museum, Washington, D.C. 20244, U.S.A.

DOI:

https://doi.org/10.54991/jop.1981.1404

Keywords:

Dicranophyllum, Fossil leaves, Upper Pennsylvanian, Late Palaeozoic, New Mexico

Abstract

Upper Pennsylvanian (Virgilian) rocks of a lagoonal deposit in the Manzanita Mountains, north-central New Mexico, contain a rich biota of both plants and animals. The plants are mostly typical Pennsylvanian genera, but the assemblage is dominated by a new species of Dicranophyllum (D. readii), characterized by its unusually long leaves. The leaves are slender, consistently twice-bifurcate, and judging from the largest fragments, reached lengths of 75 cm or slightly more. Inasmuch as Dicranophyllum is very rare in North America, this large-leaved new species lends considerable interest to the New Mexico flora and indicates that palaeobotanical exploration in the south-western United States should prove continuingly productive.

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