Anaspermum E.M.Friis, P.R.Crane et K.R.Pedersen
Plant Fossil Names Registry Number: PFN000454
Act LSID: urn:lsid:plantfossilnames.org:act:454
Reference: Friis, E. M., Crane, P. R. & Pedersen, K. R. (2019): The Early Cretaceous mesofossil flora of Torres Vedras (NE of Forte da Forca), Portugal: a palaeofloristic analysis of an early angiosperm community. – Fossil Imprint 75(2): 153–257.
Page of description: 176
Anaspermum operculatum E.M.Friis, P.R.Crane et K.R.Pedersen
Seeds small, anatropous, apparently bitegmic and exotestal, occurring isolated and singly. Seeds bilaterally symmetrical with a dorsiventral plane of
symmetry. Seed surface smooth without longitudinal ridges. Course of raphe seen on the surface of the seed as a slightly raised ridge. Micropyle and hilar scar closely spaced on a small cap-like structure. Exotesta of short sclerenchyma cells with undulate anticlinal walls, resulting in stellateundulate facets and a jigsaw puzzle-like pattern on the seed surface.
From the similarity to seeds of extant ANA grade angiosperms (Amborellaceae, Nymphaeales, Austrobaileyales).