description Bennettitales (Williamsonia sewardiana) Overview
Williamsonia sewardiana is an extinct bennettitalean seed plant known from permineralized Jurassic fossils of the Rajmahal Hills in India. Reconstructions depict a small, branched plant with a persistent stem, a crown of pinnate leaves resembling those of cycads, and stalked reproductive organs that were flower-like in overall appearance but were not true angiosperm flowers. The species is studied in paleobotany because its anatomy helps document the diversity of Mesozoic seed plants.
help Bennettitales (Williamsonia sewardiana) FAQ
What is Williamsonia sewardiana?
Williamsonia sewardiana is an extinct bennettitalean seed plant. It is known from permineralized Jurassic fossils found in India's Rajmahal Hills.
What did Williamsonia sewardiana look like?
Reconstructions show a small, branched plant with a persistent stem and a crown of pinnate leaves. The leaves resemble those of cycads, and the plant had stalked reproductive structures.
Where were fossils of Williamsonia sewardiana found?
The species is known from the Rajmahal Hills in India. Its fossils are permineralized, meaning mineral replacement preserved detailed plant tissues.
Was Williamsonia sewardiana a dinosaur?
No. It was a seed plant, not an animal or dinosaur. It belonged to the extinct bennettitalean group and lived during the Jurassic.
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