Abstract
Heterangium kentuckeyensis sp. nov. is described from Lower/Middle Pennsylvanian sediments of eastern Kentucky, based on permineralized stems, petioles, frond members, laminar foliage, and roots, including several organs in attachment. The characters used to distinguish the subgenera of Heterangium are evaluated and found to be unreliable. Moreover, suggested phylogenetic schemes both within Heterangium and between this taxon and other lyginopterid pteridosperms based on these features are inconsistent with stratigraphic data. Until reproductive features are known, the classification of Heterangium species is best based on characters of the vegetative sporophyte, including stelar organization, cortical histology, and frond morphology. - from AuthorsKentucky new taxon
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1184-1204 |
| Number of pages | 21 |
| Journal | American Journal of Botany |
| Volume | 74 |
| Issue number | 8 |
| State | Published - 1987 |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Plant Science
Cite this
Paleozoic seed ferns : Heterangium kentuckyensis sp. nov., from the Upper Carboniferous of North America. / Pigg, Kathleen; Taylor, T. N.; Stockey, R. A.
In: American Journal of Botany, Vol. 74, No. 8, 1987, p. 1184-1204.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Paleozoic seed ferns
T2 - Heterangium kentuckyensis sp. nov., from the Upper Carboniferous of North America.
AU - Pigg, Kathleen
AU - Taylor, T. N.
AU - Stockey, R. A.
PY - 1987
Y1 - 1987
N2 - Heterangium kentuckeyensis sp. nov. is described from Lower/Middle Pennsylvanian sediments of eastern Kentucky, based on permineralized stems, petioles, frond members, laminar foliage, and roots, including several organs in attachment. The characters used to distinguish the subgenera of Heterangium are evaluated and found to be unreliable. Moreover, suggested phylogenetic schemes both within Heterangium and between this taxon and other lyginopterid pteridosperms based on these features are inconsistent with stratigraphic data. Until reproductive features are known, the classification of Heterangium species is best based on characters of the vegetative sporophyte, including stelar organization, cortical histology, and frond morphology. - from AuthorsKentucky new taxon
AB - Heterangium kentuckeyensis sp. nov. is described from Lower/Middle Pennsylvanian sediments of eastern Kentucky, based on permineralized stems, petioles, frond members, laminar foliage, and roots, including several organs in attachment. The characters used to distinguish the subgenera of Heterangium are evaluated and found to be unreliable. Moreover, suggested phylogenetic schemes both within Heterangium and between this taxon and other lyginopterid pteridosperms based on these features are inconsistent with stratigraphic data. Until reproductive features are known, the classification of Heterangium species is best based on characters of the vegetative sporophyte, including stelar organization, cortical histology, and frond morphology. - from AuthorsKentucky new taxon
UR - http://www.scopus.com/inward/record.url?scp=0023497061&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0023497061&partnerID=8YFLogxK
M3 - Article
VL - 74
SP - 1184
EP - 1204
JO - American Journal of Botany
JF - American Journal of Botany
SN - 0002-9122
IS - 8
ER -