New dispersed seed-megaspores from the mid-Givetian of European Russia

Autor:	Elżbieta Turnau, A.D. Arkhangelskaya
Rok vydání:	2003
Předmět:	biology fungi Heterospory Paleontology biology.organism_classification Devonian Spore Taxon stomatognathic system Progymnosperm Genus Botany Megaspore Ecology Evolution Behavior and Systematics
Zdroj:	Review of Palaeobotany and Palynology. 127:45-58
ISSN:	0034-6667
DOI:	10.1016/s0034-6667(03)00093-9
Popis:	New genus and species of dispersed megaspore tetrads, consisting of one large (presumably fertile) and three small (presumably aborted) spores, are described from mid-Givetian deposits of European Russia. These are probably the oldest seed-megaspores recorded so far. The new taxon is Granditetraspora zharkovae gen. et sp. nov. A progymnosperm affinity for the fossil is suggested. It is also implied that the parent plants of the described seed-megaspores arose from ancestors that displayed only a low grade of heterospory.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1ca7868a02affc3c66e8016b6e13b34b https://doi.org/10.1016/s0034-6667(03)00093-9 Zobrazit plný text záznamu Full Text from ScienceDirect