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In this group, created by Valentin Krassilov (1975), which has ovule-bearing organs, termed gynoclads, is interpreted as organized in raceme-like clusters. Each pair of capsules (?megasporophylls) of Dirhopalostachys rostrata contains a single ovule. The affinities are suggested as being with the cycad Beania (Krassilov, 1975).
Geological Age
Geological Age
Fossils found in Siberia
Classification
Classification
└Dirhopalostachyaceae †
Dirhopalostachys
Dirhopalostachys
Krassilov, 1973
D. rostrata
Krassilov, 1973
D. dubia
Krassilov, 1973
Above: Single capsule of Dirhopalostachys rostrata
with conspicuous keel (Cretaceous). Bar 1.25 mm.
Right: Dirhopalostachys rostrata axis with capsules
(Cretaceous). Bar 2.5 mm
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