Stopesia alveolata Tosh.Yamada et M.Kato
Plant Fossil Names Registry Number: PFN002354
Act LSID: urn:lsid:plantfossilnames.org:act:2354
Rank: species
Genus: Stopesia Tosh.Yamada et M.Kato
Reference: Yamada, T. & Kato, M. (2008): Stopesia alveolata, a fossil seed of Trimeniaceae from the Lower Cretaceous (Albian) of Hokkaido, northern Japan. – Acta phytotaxonomica et geobotanica 59(3): 228–230.
Page of description: 228
Illustrations or figures: fig. 1
Name is type for
Types
Holotype NSM-PP-9176, National Museum of Nature and Science, Tokyo, Japan
Figures: fig. 1
Original diagnosis/description
Seed ellipsoid, 3 mm long, 2.2 mm thick, anatropous, bitegmic. Endosperm well developed, occupying larger area than perisperm. Embryo minute, encased in the micropylar region of endosperm. Micropyle endo- and exostomic. Antiraphal vascular bundles absent. Inner integument operculate in endostomic region, but mostly crushed in other areas. Testa consisting of exotesta and mesotesta. Exotesta lignified, consisting of 1–5 layers of isodiametric cells, surface alveolate. Mesotesta parenchymatous, consisting of 4 or 5 layers of cells elongated longitudinally to seed axis.
Etymology
The epithet is from the alveolate surface of the seed.
Stratigraphy
Cretaceous, Lower Cretaceous, Albian
Albian Hikagenosawa Formation, Yezo Group
Locality
Japan
Ponbetsu area, Mikasa City, Hokkaido
Plant fossil remain
macro- and meso-fossils-embryophytes except wood
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