The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community
Friis, Else Marie
Crane, Peter R.
Pedersen, Kaj Raunsgaard
Fossil Imprint
2019
2019-11-25
75
2
153
257
RYDIN, K. R. PEDERSEN, P. R. CRANE et E. M. FRIIS, 2006
RYDIN, K. R. PEDERSEN, P. R. CRANE et E. M. FRIIS
2006
Gnetopsida
Ephedraceae
Ephedrispermum
GBIF
Plantae
Gnetales
17
170
Tracheophyta
species
lusitanicum
D e s c r i p t i o n a n d r e m a r k s.Chlamydospermous seeds that are four-angled to circular in transverse section, about 0.7 mmlong and 0.55–0.6.5 mm wide. The seed envelope is sclerenchymatic with about 40 slightly raised longitudinal ridges ( Text-fig. 11d). Ephedroid pollen grains have been observed in the micropyles of several specimens and also on the surface of the seed envelope ( Text-fig. 11e, f). A f f i n i t y a n d o t h e r o c c u r r e n c e s. Ephedrispermum lusitanicumis common in the Torres Vedras mesofossil flora and also in the mesofossil flora from Buarcos (the typelocality for the genus and species). Seeds of Ephedrispermumare also known from the Famalicão and Valede Água mesofossil floras, but these seeds differ in having fewer ridges on the seed envelope and in details of the associated pollen grains. The Famalicão and Valede Água specimens have been assigned to a separate species E. tenuicostatumE.M.FRIIS, P.R.CRANE et K.R.PEDERSEN ( Friis et al. 2019c). Genus QuadrispermumE.M.FRIIS, K.R.PEDERSEN et P.R.CRANE, 2013