''Pteruchus barrealensis'' is an unusually large species of ''

Pteruchus ''Pteruchus'' is a form genus for pollen organs of the seed fern (Pteridospermatophyta family Umkomasiaceae. It was first described by Hamshaw Thomas from the Umkomaas locality of South Africa. It is associated with the seed bearing organs '' Um ...

'' with very elongate polleniferous heads from Early Triassic of Australia and Argentina.

Description

''Pteruchus barrealensis'' is one of the geologically earliest species of ''

'', and has very elongate polleniferous heads.

Whole plant reconstruction

''Pteruchus barrealensis'' from the Early

Triassic The Triassic ( ) is a geologic period and system (stratigraphy), system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago (Year#Abbreviations yr and ya, Mya), to the beginning of the Jurassic Period 201.36 ...

of Australia may have been produced by the same plant as '' Umkomasia feistmantelii'' (ovulate organs) and ''

Dicroidium zuberi ''Dicroidium zuberi'' is a large bipinnate species of the seed fern ''Dicroidium'' with a forked rachis In biology, a rachis (from the grc, ῥάχις [], "backbone, spine") is a main axis or "shaft". In zoology and microbiology In verteb ...

'' (leaves)

References

Triassic plants Pteridospermatophyta {{triassic-plant-stub