Claim · model-written summary
Leptolaena and Xyloolaena show similarities to the fossil taxon to a lesser degree.
- Taxon
- Leptolaena and Xyloolaena
LeptolaenaXyloolaenae0 - Outcome
- show similarities to a lesser degreee0
Verbatim
e0“Leptolaena and Xyloolaena show similarities to a lesser degree”
Title
On the Origin of the Sarcolaenaceae with Reference to Pollen Morphological Evidence
Siwert Nilsson; Joanna Coetzee; Elisabeth Grafström Grana 1996. doi:10.1080/00173139609429091
Other claims from this paper (9)
- Observation Fossil pollen assemblages indicate an early Miocene subtropical rainforest in South Africa in which Sarcolaenaceae were well represented.
- Observation Tetrads of Sarcolaena or Rhodolaena appear most similar to the fossil taxon, also ultrastructurally.
- Observation Eremolaena, Schizolaena, Pentachlaena and Perrierodendron are totally different from the fossil taxon.
- Observation The fossil Sarcolaenaceae tetrads could suggest an African origin for the family.
- Observation The profound vegetation change in the region was apparently complete by the early Pliocene.
- Mechanism Major climatic change in the Antarctic region towards the end of the Miocene may have caused the elimination of the subtropical forest in South Africa.
- Observation Many components that became extinct in Africa are still represented in relict forests of Madagascar.
- Observation The present Knysna forest in the southern Cape is an impoverished relict of the ancient forest where Sarcolaenaceae once flourished.
- Observation In the southwestern Cape the subtropical forest was replaced by sclerophyllous vegetation.