Polypodiopsida - Marsileaceae

Emended generic diagnosis. Rhizomes bearing compound

leaves and roots, or detached compound leaves.

Leaves with four leaflets. Leaflets sessile, obovate to obdeltoid,

base shape cuneate to convex, apex obtuse and

rounded. Margin entire or apical portion crenate. Leaflet

venation dichotomizing with few anastomoses to reticulate.

Marginal vein present.

References consulted for diagnosis. Rich et al. (2001),

Skog and Dilcher (1992), Nagalingum (2007), Herman and

Kvacek (2010).

Parent taxon: Marsileaceae according to E. J. Hermsen et al. 2013

See also Vallati et al. 2017

Sister taxa: Collarisporites, Crybelosporites, Cystorrhiza, Gabonisporis, Lugiomarsiglia, Marsilea, Mirasolita, Molaspora, Pillularia, Regnellidium, Rhizocarpites, Rodeites

Subtaxa: Marsileaceaephyllum johnhallii

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Distribution: found only at Cerro de los Fragmentos (CF2) (Cretaceous of Argentina)

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Specimen images are retrieved through the ePANDDA API.