6533b820fe1ef96bd1279a3d

RESEARCH PRODUCT

The extrabasinal elements in Lower Pennsylvanian floras of the Maritime Provinces, Canada: Description of Adiantites, Pseudadiantites and Rhacopteridium

Robert Herman Wagner

subject

Nova scotiaFrondPaleozoicbiologyPaleontologybiology.organism_classificationQE701-760PaleontologyGeographyHabitatPennsylvanianFernflora pennsylvanian namurian westphalian nova scotia extrabasinal.Palaeogeography

description

Adiantites adiantoide s (Lindley and Hutton) Kidston, Pseudadiantites sessilis (Roehl) Gothan and Pseudadiantites rhomboideus (Ettingshausen) comb. nov. are figured and described as well as Rhacopteridium speciosum (Ettingshausen) Hirmer, as part of a revision of lower Pennsylvanian floras of Nova Scotia. These species show a foliar branching structure which is described as "pseudopinnate" as against the fully planated pinnate structure of the Palaeozoic fern and pteridosperm fronds. Their systematic affinity is unknown. A discussion is presented of the genera A diantites, Pseudadiantites, Aneimites , Palaeopteridium , and Triphyllopteris , and the problematic nature of the history of Adiantites is emphasised. The four species described are rare though rather more widespread than previous records suggested. Their occurrence is apparently linked to habitat and local palaeogeography rather than to considerations of general palaeogeographic distribution.

yearjournalcountryeditionlanguage
2021-09-21Spanish Journal of Palaeontology
https://doi.org/10.7203/sjp.16.2.21599