Ephedrispermum lusitanicum Rydin, K.R.Pedersen, P.R.Crane et E.M.Friis
Plant Fossil Names Registry Number: PFN000590
Act LSID: urn:lsid:plantfossilnames.org:act:590
Genus: Ephedrispermum Rydin, K.R.Pedersen, P.R.Crane et E.M.Friis
Reference: Rydin, C., Pedersen, K. R., Crane, P. R. & Friis, E. M. (2006): Former Diversity of Ephedra (Gnetales): Evidence from Early Cretaceous Seeds from Portugal and North America. – Annals of Botany 98(1): 123–140.
Page of description: 129
Illustrations or figures: fig. 5A–N
Name is type taxon for
Holotype S148062, Palaeobotanical Collections, Department of Palaeobiology, the Swedish Museum of Natural History, Stockholm, Sweden
Figures: fig. 5A, L
Note: holotype: Buarcos sample 244
paratypes: S148062–S148064 (Buarcos sample 244); S148079–S148083 (Buarcos sample 157); S148097, S148099 (Buarcos sample 209); S148076 (Buarcos sample 211); S148074, S148085–S148086, S148091 (Buarcos sample 243); and S148106–S148109, S148111–S148112, S148114–S148120, S148125, S149286–S149289 (Torres Vedras sample 43)
Fossil seeds with their general organization and structure similar to modern Ephedra. Seeds ovoid to almost spherical with a short pointed apex. Nucellus and integument surrounded by an outer sclerenchymatous seed envelope, seed envelope distinctly four-angled towards apex. Sclerenchyma cells rectangular and in two layers, outer layer cells transversely arranged, inner layer longitudinally arranged. Papillae on seed envelope not observed. Pollen grains narrowly ribbed. Seeds minute, 0.6–0.9 mm long, 0.6–0.8 mm wide, ovoid to spherical with short pointed apex. Attachment scar prominent, rounded, approx. 0.1 mm in diameter. Outer layer of sclerenchyma cells rectangular, up to 30 μm long, transversely arranged. Inner layer cells up to 30 μm long, longitudinally arranged. Pollen grains approx. 23 μm long, 10 μm wide, approx. six ridges on the exposed side (inferred total of up to 12 ridges).
From Lusitania, name of Roman province covering central Portugal where the fossils were collected.
Cretaceous, Lower Cretaceous
Calvaria Member, Figueira da Foz Formation. Early Cretaceous (late Aptian or early Albian).
Buarcos, North of Figueira da Foz (40°09′54″N; 8°52′11″W)
Plant fossil remain
macro- and meso-fossils-embryophytes except wood