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Guazia, the earliest ovule without cupule but with unique integumentary lobes.
- Source :
- National Science Review; Apr2022, Vol. 9 Issue 4, p1-8, 8p
- Publication Year :
- 2022
-
Abstract
- The earliest ovules in the Late Devonian (Famennian) are surrounded by a cupule that is involved in both protection and pollination, and generally have free integumentary lobes. Here we report a new taxon from the Famennian of China, Guazia dongzhiensis gen. et sp. nov. The terminally borne ovule is apparently acupulate (without cupule) and has four radially arranged wing-like integumentary lobes that are extensively fused, and folded lengthwise and inwards. Guazia provides evidence that not all Devonian seeds possess a cupule and it increases their diversity in integumentary lobes. This genus also suggests that the integuments develop new functions, probably including wind dispersal at the expense of the cupules. [ABSTRACT FROM AUTHOR]
- Subjects :
- OVULES
POLLINATION
Subjects
Details
- Language :
- English
- ISSN :
- 20955138
- Volume :
- 9
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- National Science Review
- Publication Type :
- Academic Journal
- Accession number :
- 157332045
- Full Text :
- https://doi.org/10.1093/nsr/nwab196