Toretzia
| Toretzia | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temporal occurrence | ||||||||||||
| Upper Triassic to Lower Cretaceous | ||||||||||||
| 200 to 100 million years | ||||||||||||
| Locations | ||||||||||||
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Ukraine, China |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Toretzia | ||||||||||||
| Stanislavsky | ||||||||||||
Toretzia is an extinct seed plant of the Umaltolepidiaceae familyand a relative of the ginkgo .
features
The seminal organs have one to two ovules per axis. In Toretzia bracts are missing , as possessed by the related Umaltolepis . A cupula is also missing from Toretzia . Their ovules are anatropic .
Together with the seed organs, linear to ribbon-like leaves of the genus Pseudotorellia are found. These have two or more indistinct parallel cores.
distribution
The genus Toretzia is known from the Rhaetian of Ukraine. Also deposits from the Lower Cretaceous (possibly Aptian ) from Heilongjiang are likely .
Systematics
From Toretzia several species have been able to be reconstructed. Zhou (2009) names the following:
- Toretzia angustifolia : seed organs that sit on short shoots together with ribbon-like leaves; from the Upper Triassic of the Donets Basin , Ukraine
- Toretzia longiufolia : ribbon-like leaves on short sprouts from the Upper Triassic of the Donets Basin
- Toretzia shunfaensis : seed organs, probably belonging to Pityophyllum leaves, from the Lower Cretaceous of Heilongjiang Province (China)
Type species is Toretzia angustifolia .
supporting documents
- Zhi-Yan Zhou: An overview of fossil Ginkgoales. In: Palaeoworld. Volume 18, No. 1, 2009, pp. 1–22, doi: 10.1016 / j.palwor.2009.01.001 .
- Thomas N. Taylor, Edith L. Taylor, Michael Krings: Paleobotany. The Biology and Evolution of Fossil Plants. 2nd Edition. Academic Press, Amsterdam et al. 2009, ISBN 978-0-12-373972-8 , p. 752.