Note on different kinds of attachments in trigonocarpalean (Medullosales) ovules from the Pennsylvanian Sydney Coalfield, Canada
DOI :
https://doi.org/10.4138/1039Résumé
The global data base for detached trigonocarpalean (Medullosales) ovules is large, and they are found in the Euramerican and Cathaysian fl oral provinces, from the Pennsylvanian to early Permian Periods. Despite the abundance, little is still known on what parts of the parent plant the ovules were borne, or in what arrangement they were attached. New data are presented for organically paired, suggested triplet, and axially or cauline borne trigonocarpalean ovules from the Sydney Coalfi eld, Nova Scotia. RÉSUMÉ La base de données mondiale des ovules trigonocarpaléens (Medullosales) détachés est imposante; on les trouve dans les provinces fl oristiques euraméricaine et cathaysienne de la période du Pennsylvanien au Permien précoce. Malgré cette abondance, on sait encore peu de choses sur les parties de la plante-mère où sont nés les ovules, ou selon quelle disposition ils étaient fi xés. De nouvelles données sont présentées au sujet d'ovules trigonocarpaléens biologiquement jumelés, présumés triplets et axiaux ou caulinaires du terrain houiller de Sydney, en Nouvelle-Écosse. [Traduit par la rédaction.]Téléchargements
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