Pazlia hilaris E.M.Friis, P.R.Crane et K.R.Pedersen
Plant Fossil Names Registry Number: PFN000091
Act LSID: urn:lsid:plantfossilnames.org:act:91
Authors: E. M. Friis, P. R. Crane & K. R. Pedersen
Rank: species
Genus: Pazlia E.M.Friis, P.R.Crane et K.R.Pedersen
Reference: Friis, E. M., Crane, P. R. & Pedersen, K. R. (2018): Extinct taxa of exotestal seeds close to Austrobaileyales and Nymphaeales from the Early Cretaceous of Portugal. – Fossil Imprint 74(1–2): 135–158.
Page of description: 140
Illustrations or figures: text-figs 3a–e, 4a, b
Name is type for
Types
Holotype S175096, Palaeobotanical Collections, Department of Palaeobiology, the Swedish Museum of Natural History, Stockholm, Sweden
Figures: text-figs 3a–d, 4a, b
Note: Paratypes: S174336, S174342, S175083, S175098, S175105, S175106 (deposited in Palaeobotanical Collections, Department of Palaeobiology, the Swedish Museum of Natural History, Stockholm, Sweden)
Original diagnosis/description
Isolated seeds occurring singly. Seeds small, anatropous, bitegmic and exotestal. Seeds bilaterally symmetrical with dorsiventral plane of symmetry. Seed surface smooth without longitudinal ridges. Raphe distinct, seen externally as a raised, rounded ridge that extends from hilum to the chalazal end opposite the micropyle. Hilum and micropyle separated by a broad zone of testal sclerenchyma. Hilar scar large, narrowly elongate with abundant sclerenchyma tissue beneath the scar and lacking a hilar rim. Micropyle formed by the inner integument (tegmen) and marked on the seed surface by a transverse slit through the outer integument (testa) adjacent to the hilar scar. Testa formed from an outer layer (exotesta) of palisade-shaped sclerenchyma cells and an inner thin layer of thin-walled parenchyma cells (mesotesta/endotesta). Palisade-shaped cells of exotesta with evenly thickened anticlinal walls and a straight lumen. Anticlinal walls of the exotesta cells strongly undulate toward the inside and toward the outside, resulting in stellate-undulate facets and a jigsaw puzzle-like pattern on the seed surface. Tegmen thin.
Etymology
From Latin: hilaris, relating to the hilum to emphasis the large hilar scar and strongly developed sclerenchyma tissue under hilum.
Stratigraphy
Cretaceous, Lower Cretaceous
Aptian – early Albian or older
Type horizon: below the Figueira da Foz Formation
Locality
Portugal
Famalicão (39°42′16″N; 8°46′12″W)
Plant fossil remain
macro- and meso-fossils-embryophytes except wood
Comments
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