Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

The First Report of Four Gymnosperms Plant Macrofossil Species (Cycadophyta and Ginkgophyta) in Iran

Document Type : Original Research Paper

Author
Javad Saadat Nejad
Oil Exploration Operation Company, Tehran, Iran
Abstract
     To study and introduce plant macrofossils of Late Triassic – Middle Jurassic (Shemshak Formation), Ramsar – Javaher deh (Northern Alborz) and Eshkevarat-e-olia (Central Alborz) areas were studied. The performed investigation led us to the presentation of four species of Gymnosperms group for the first time in Iran. The two, Ctenis kaneharai and Pseudoctenis herriesi species belong to division Cycadophyta (order Cycadales) and the two, Ginkgoytes longifolius and Baiera furcata species are the members of division Ginkgophyta (order Ginkgoales). With respect to Schweitzer et al (1995, 1998, 2000), the species: Ctenis sp. A and Ctenis sp. B, introduced by Fakhr (1975) from Gajereh and Ferizi and Ctenis afghanensis, introduced by Jacob & Shukla (1955) from Afghanistan, are not synonymous with Ctenis kaneharai. Likewise, Pseudoctenis herriesi is not synonymous with Nilssonia herriesi species.                                                                                                                            
Keywords
Plant macrofossils
Shemshak Formation
Ramsar – Javaher deh
Eshkevarat-e-olia
Alborz
Iran
Gymnosperms
Cycadophyta
Ginkgophyta

Subjects

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Scientific Quarterly Journal of Geosciences
Volume 15, Issue 57
Autumn 2006, Vol. 15, No. 57
Autumn 2006
Pages 128-133