Potoniea krisiae Pšenička, Zodrow et Bek

Plant Fossil Names Registry Number: PFN000854

Act LSID: urn:lsid:plantfossilnames.org:act:854

Authors: J. Pšenička, E. L. Zodrow & J. Bek

Rank: species

Reference: Pšenička, J., Zodrow, E. L. & Bek, J. (2019): The compound synangial organ Potoniea krisiae sp. nov. and its plausible relationship with linopterids based on cuticles from the Late Pennsylvanian Sydney Coalfield, Canada. – International Journal of Coal Geology 210: 103200 (10 pp.).

Page of description: 2

Illustrations or figures: figs 2–4


Holotype 003GF-325, Palaeobotanical Collections, University College of Cape Breton, Sydney, Nova Scotia, Canada
Figures: figs 3, 4

Note: Repository as "Carboniferous Palaeobiological Laboratory, Cape Breton University" in Pšenička et al. (2019: Int. J. Coal Geol., 210: 103200, p. 2).

Paratypes: 003GF-254, 003GF-252, 004GF-Z42, and 003GF-253 (deposited in the same repository as holotype).

Original diagnosis/description

Compound synangial organ, circular or irregular-square-ellipsoid, 15–20 mm wide. Organ attached by an excentrally positioned, narrow (0.3 mm) stalk consists of a conical part and a thick proximal cap, both with small swollen structures and a synangial proximal part. Proximal cap and outer cover vascularized, veins dichotomizing several times. Synangia, consisting of five to six cylindrical sporangia, are arranged in concentric rows. Sporangia ca. 2 mm long and 0.5 mm wide. Free sporangial tips extending from the distal surface of the organ. Sporangial dehiscence zone located along a line that presumably runs down the inner face. Trilete circular to oval microspores, exine granulate, verrucate to irregularly rugulate.


Carboniferous, Pennsylvanian, Moscovian
Lloyd Cove Seam, late Moscovian (Cantabrian)


Brogan's open-pit coal mine, Sydney Coalfield, Cape Breton Island, Nova Scotia

Plant fossil remain

macro- and meso-fossils-embryophytes except wood


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