Lobospermum E.M.Friis, K.R.Pedersen et P.R.Crane
Plant Fossil Names Registry Number: PFN002850
Act LSID: urn:lsid:plantfossilnames.org:act:2850
Reference: Friis, E. M., Pedersen, K. R. & Crane, P. R. (2009): Early Cretaceous mesofossils from Portugal and eastern North America related to the Bennettitales-Erdtmanithecales-Gnetales group. – American Journal of Botany 96(1): 252–283.
Page of description: 258
Lobospermum stampanonii E.M.Friis, K.R.Pedersen et P.R.Crane
Seeds small, radially symmetrical, ellipsoidal, micropylar region pointed; four-lobed in cross section. Integument thin, micropylar tube long, narrow. Integument enclosed by a seed envelope, except for the micropylar opening, and attached to the envelope only at the base. Micropyle open at the apex. Below, it is closed by a distinct, multicellular closure that fi lls the lower half of the micropyle. Micropylar closure formed mainly from a layer of larger cells that are expanded radially toward the center of the micropylar tube. Seed lobes separated by deep grooves; each with a narrow longitudinal median ridge. Inner surface of seed envelope smooth, nonpapillate; outer surface smooth or rugulate. Seed envelope with an inner and outer sclerenchyma layer. Cells of inner sclerenchyma layer long, fi brous arching upwards in a chevron pattern. Arches formed by the fi bers are high and broad. Cells of outer sclerenchyma layer narrow, longitudinally aligned. Inner and outer sclerenchyma layers clearly delimited.
From the four-lobed shaped of the seeds.
Plant fossil remain
macro- and meso-fossils-embryophytes except wood
Names associated with genus
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