Samylinaea punctatus, E. M. FRIIS, K. R. PEDERSEN et MARONE, 2014

Friis, Else Marie, Crane, Peter R. & Pedersen, Kaj Raunsgaard, 2019, The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community, Fossil Imprint 75 (2), pp. 153-257 : 165-167

publication ID

https://doi.org/ 10.2478/if-2019-0013

persistent identifier

https://treatment.plazi.org/id/0396DC10-BF03-C20D-CED5-B15EE6AE1E31

treatment provided by

Diego

scientific name

Samylinaea punctatus
status

 

Arcellites punctatus E.M.FRIIS, K.R.PEDERSEN et MARONE, 2014

Text-fig. 6c, d View Text-fig

D e s c r i p t i o n a n d r e m a r k s. The species is common in the Torres Vedras mesofossil flora from which more than 100 specimens of megaspores, often with associated microspores ( Friis et al. 2014b) have been recovered. The megaspores are spherical, lack appendages on the spore wall and have a long, twisted acrolamella often with smooth microspores attached to its surface ( Text-fig. 6c, d View Text-fig ).

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. Arcellites punctatus is the only species of Arcellites currently recognized in the mesofossil floras from the Early Cretaceous of Portugal. In addition to the specimens from Torres Vedras, other (rare) specimens are known only from Buarcos and Catefica. The presence of an acrolamella, and the associated microspores, clearly indicate a relationship to extant Marsileaceae , with the fossil genus most likely on the stem group of the extant family.

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