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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| Format: | Article |
| Language: | English |
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Universidad Nacional Autónoma de México
2018-11-01
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| Series: | Revista Mexicana de Ciencias Geológicas |
| Subjects: | |
| Online Access: | https://rmcg.unam.mx/index.php/rmcg/article/view/1068 |
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| Summary: | 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 were either sterile or fertile… download the full paper in PDF.
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| ISSN: | 1026-8774 2007-2902 |