A seed-bearing lobatopterid frond segment from the Westphalian D (Upper Pennsylvanian) of south-central Germany

Autor:	Stephan Schultka, Michael Krings
Rok vydání:	2010
Předmět:	Frond Paleozoic Stratigraphy Geology Biostratigraphy Westphalian sovereignty Paleontology Fuel Technology Carboniferous Pennsylvanian Botany Economic Geology Gross morphology Integument
Zdroj:	International Journal of Coal Geology. 83:125-131
ISSN:	0166-5162
DOI:	10.1016/j.coal.2009.09.003
Popis:	The Pennsylvanian foliage morphogenus Lobatopteris is commonly referred to the marattialean ferns based on the presence of synangia in fertile specimens. This paper reports on a seed-bearing frond segment from the Westphalian D (Upper Pennsylvanian) of the Zwickau–Oelsnitz Basin, Germany, that corresponds to Lobatopteris with regard to gross morphology and venation. Seeds are ovoid and occur in place of basiscopic pinnules positioned proximally on the ultimate pinnae. Lateral extensions of the seed integument appear to form two wings in a primary plane. Discovery of a seed-bearing lobatopterid reveals that this type of foliage was not exclusively produced by ferns, but also by seed plants.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::08da888c827121de927c6f1dd46523e2 https://doi.org/10.1016/j.coal.2009.09.003 Zobrazit plný text záznamu Full Text from ScienceDirect