New and poorly known ferns from the Santa Clara Formation, Late Triassic, Sonora, NW Mexico; III Marattiales. Tranquilia Herbst—a Panamerican dimorphic genus

The dimorphic marattialian fern Tranquilia whitneyi (Newberry) Herbst - formerly “Alethopteris whitneyi Newberry” and “Pecopteris falcatus Emmons”- from the Carnian (and perhaps Norian?) Santa Clara Formation of central Sonora, NW Mexico, is redescribed. Most of the older specimens of this species...

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Bibliographic Details
Main Author: Reinhard Weber
Format: Article
Language:English
Published: Universidad Nacional Autónoma de México 2018-11-01
Series:Revista Mexicana de Ciencias Geológicas
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Online Access:https://rmcg.unam.mx/index.php/rmcg/article/view/1068
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