A new microphyllous plant from the Lower Devonian of Yunnan Province, China

Li, Cheng-Sen and Edwards, Dianne ORCID: https://orcid.org/0000-0002-9786-4395 1997. A new microphyllous plant from the Lower Devonian of Yunnan Province, China. American Journal of Botany 84 (10) , pp. 1441-1448. 10.2307/2446142

Full text not available from this repository.

Abstract

Sterile and fertile shoots of a microphyllous vascular plant are described from the Lower Devonian Posongchong Formation (? upper Siegenian), Yunnan Province, southern China and placed in the new taxon Halleophyton zhichangense gen. et sp. nov. The sterile axes are characterized by conspicuous, contiguous swollen rhomboidal to hexagonal leaf bases and relatively broad spatulate laminae. The relief of the leaf bases is not so pronounced in the fertile areas, which bear numerous cauline sporangia with two equal valves. In vegetative characters the new fossils, although smaller and more fragmentary, resemble Drepanophycus gaspianus but in the absence of information on the fertile parts of the latter and because of the controversy surrounding the concept of the genus Drepanophycus, we decided to erect a new genus. Its relationship to the lycophytes sensu stricto is equivocal as exact details of the relationship of sporangium with leaf and sporangium vascularization remain unknown.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Earth and Environmental Sciences
Subjects:	Q Science > QE Geology Q Science > QK Botany
Publisher:	Botanical Society of America
ISSN:	0002-9122
Last Modified:	18 Oct 2022 12:31
URI:	https://orca.cardiff.ac.uk/id/eprint/10156

Citation Data

Cited 19 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item