Ellesmeris sphenopteroides, gen. ET SP. NOV., a new zygopterid fern from the Upper Devonian (Frasnian) of Ellesmere, N.W.T., Arctic Canada

• 1 January 1997
• journal article
• Published by Wiley in American Journal of Botany
• Vol. 84  (1) , 85-103
• https://doi.org/10.2307/2445886

Abstract

Funding Information

• Natural Sciences and Engineering Research Council of Canada (OGP 0001334)
• National Science Foundation (BSR 83‐15254)