Paisia pantoporata E.M.Friis, M.M.Mendes et K.R.Pedersen
Plant Fossil Names Registry Number: PFN000705
Act LSID: urn:lsid:plantfossilnames.org:act:705
Authors: E. M. Friis, M. M. Mendes & K. R. Pedersen
Rank: species
Genus: Paisia E.M.Friis, M.M.Mendes et K.R.Pedersen
Reference: Friis, E. M., Mendes, M. M. & Pedersen, K. R. (2018): Paisia, an Early Cretaceous eudicot angiosperm flower with pantoporate pollen from Portugal. – Grana 57(1–2): 1–15.
Page of description: 4
Illustrations or figures: figs 1–6, 8
Name is type for
Types
Holotype S101214, Palaeobotanical Collections, Department of Palaeobiology, the Swedish Museum of Natural History, Stockholm, Sweden
Figures: figs 1A, B, 2A–G
Note: Holotype from Catefica sample 49.
Paratypes: S118679, S118680, S118682, S171526, S174746, S174747 (Catefica 49); S174739, S174740, S174742 (Catefica 50); S171530 (Catefica 151); S174302 (Catefica 242); S170429, S171519 (Catefica 342); S171514, S171515 (Catefica 343); S174743, S174344 (Catefica 361). Totally, about 60 specimens; several specimens may be stored in box slides under the same number.
Original diagnosis/description
Flower small, pedicellate, actinomorphic, pentamerous and isomerous and functional bisexual with one whorl of five tepals, one whorl of five stamens and one whorl of five free carpels, all opposite on the same radii. Receptacle distinctly five-angled. Perianth of a single whorl of five tepals; aestivation involute-valvate. Tepal base extended downwards and margins incurved, clasping the stamens. Stamens with a single massive bundle extending from base to apex. Stamens differentiated into a short, stout filament and an elongated, basifixed anther. Anthers dithecate and tetrasporangiate; sporangia minute, separated by a massive connective. Anther dehiscence latrorse by longitudinal slits. Pollen pantoporate, tectate-punctate, spiny. Gynoecium superior; carpels free, sessile, elongate, and plicate. Ovules many, borne in two longitudinal rows on either side of the ventral suture. Stigma sessile, decurrent, indistinct.
Etymology
From the pantoporate pollen observed in situ in the stamens.
Stratigraphy
Cretaceous, Lower Cretaceous
Almargem Formation, Early Cretaceous (late Barremian–early Albian).
Locality
Portugal
Catefica (39° 03ʹ 30ʺ N; 09°14ʹ 30ʺW), between the villages of Catefica and Mugideira, about 4 km south of Torres Vedras, Portugal.
Plant fossil remain
macro- and meso-fossils-embryophytes except wood
Comments
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