Gastonispermum antiquum E.M.Friis, P.R.Crane et K.R.Pedersen
Plant Fossil Names Registry Number: PFN000453
Act LSID: urn:lsid:plantfossilnames.org:act:453
Genus: Gastonispermum E.M.Friis, P.R.Crane et K.R.Pedersen
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: 175
Illustrations or figures: Text-fig. 14a–e
Holotype S136736, Palaeobotanical Collections, Department of Palaeobiology, the Swedish Museum of Natural History, Stockholm, Sweden
Figures: Text-fig. 14b
Note: Holotype from Torres Vedras sample 43.
Paratypes: S136737, S136738, S170085 (Torres Vedras sample 43); S136680, S136681, S174629 (Torres Vedras sample 298) housed in the Palaeobotanical Collections, Department of Palaeobiology, the Swedish Museum of Natural History, Stockholm, Sweden.
Isolated seeds occurring singly. Seeds small, anatropous, bitegmic and exotestal. Seed surface smooth without longitudinal ridges. Course of raphe seen as a slightly raised rounded ridge. Hilum and micropyle separated by a narrow zone of sclerenchyma. Hilar scar small, slightly raised without a hilar rim. Micropyle formed by the inner integument (tegmen) and marked on the seed surface by a Y-shaped slit through the outer integument (testa) adjacent to the hilar scar. Exotesta of palisade-shaped sclerenchyma cells; mesotesta/endotesta of thin-walled parenchyma cells. Palisade-shaped cells of exotesta with evenly thickened anticlinal walls and a straight lumen. Anticlinal walls of palisade-shaped sclerenchyma strongly undulate toward the inside and toward the outside, resulting in stellate-undulate facets and a jigsaw puzzle-like bpattern on the seed surface. Tegmen thin.
From Latin: antiquus referring to the great age of these seeds.
Cretaceous, Lower Cretaceous
Lower member of the Almargem Formation; Early Cretaceous (late Barremian-early Aptian)
Torres Vedras (NE of Forte de Forca; 39°06′13″ N, 9°14′47″ W)
Plant fossil remain
macro- and meso-fossils-embryophytes except wood