• Chhaya Biswas
  • B. M. Johri


This is a Mesozoic Pteridosperm which is often described as a distinct Order. In some classificatory systems, three families are included in this Order: Caytoniaceae, Corystospermaceae and Peltaspermaceae (see Stewart 1983).


Middle Jurassic Abscission Layer Pollen Drop Distinct Order Reticulate Venation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Chhaya Biswas
    • 1
  • B. M. Johri
    • 2
  1. 1.Gargi CollegeUniversity of Delhi South CampusNew DelhiIndia
  2. 2.Central Reference LibraryUniversity of DelhiDelhiIndia

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