Classostrobus amealensis Tekleva, M.M.Mendes, J.Kvaček, van Konijnenb. et Heřmanová

Plant Fossil Names Registry Number: PFN003503

Act LSID: urn:lsid:plantfossilnames.org:act:3503

Authors: M. V. Tekleva, M. M. Mendes, J. Kvaček, J. H. A. van Konijnenburg-van Cittert & Z. Heřmanová

Rank: species

Genus:

Reference for this name: Tekleva, M. V., Mendes, M. M., Kvaček, J., van Konijnenburg-van Cittert, J. H. A. & Heřmanová, Z. (2026): The microsporangiate cone Classostrobus amealensis sp. nov. with in situ pollen from the Lower Cretaceous (lower Hauterivian) of Portugal: pollen ultrastructure and implications for frenelopsid species diversity. – Cretaceous Research 181: 106315 (1–17)., link

Page of description: 5

Illustrations or figures: Figures 3–9

Types

Original diagnosis/description

Pollen cone ovoid, formed by ca. 20 peltate deltoid imbricate microsporophylls, helically arranged; each sporophyll consisting of a stalk and a microsporophyll head bearing four pollen sacs abaxially; microsporophyll heads smooth or finely papillate showing an acute apex fringed with short trichomes, abaxial cuticle bearing stomata in irregular short rows. In situ pollen grains assigned to the sporae dispersae genus Classopollis; pollen spheroidal with flattened polar areas, distinctive subequatorial circular furrow and equatorial band with clearly seen striations, distal cryptopore and distinct proximal tetrad mark; exine with microechinate sculpture.

Etymology

The specificepithet amealensis is derived from the small village of Ameal close to where the microsporangiate cone was collected.

Stratigraphy

Cretaceous, Lower Cretaceous, Hauterivian
Santa Susana Formation, Age. Early Cretaceous, early Hauterivian.

Locality

Portugal
Vale Cortiço opencast clay pit complex, situated near the small village of Ameal, Estremadura region, centralwestern mainland Portugal.