Geperapteris rotunda Naugolnykh

Plant Fossil Names Registry Number: PFN001925

Act LSID: urn:lsid:plantfossilnames.org:act:1925

Rank: species

Genus:

Reference: Naugolnykh, S. V. (2013): Permian Ferns of Western Angaraland. – Paleontological Journal 47(12): 1379–1462., link

Page of description: 1435

Illustrations or figures: pl. 23, figs 1–5

Types

Holotype 4851/175, Geological Institute, Russian Academy of Sciences, Moscow, Russia
Figures: fig. 24, pl. 23, figs 1–5

Original diagnosis/description

Fronds bipinnate or tripinnate. Frond rachis undulating. Pinna rachis straight. Pinnules pecopteroid, with lobate margins. Sori capitate, round, hemispherical, consisting of 14–18 sporangia attached to receptacle. Spores round to subtriangular, 30–40 μm in diameter, with trilete scar. Rays of trilete scar reaching onethird of spore radius. Proximal surface of spore smooth, distal surface ornamented by fine scabrae.

Etymology

From the Latin rotunda (round), based on the round shape of sori.

Stratigraphy

Permian
Middle Permian, Kazanian Stage

Locality

Russian Federation
Pechora Coal Basin, borehole VK-12, 807.5 m of depth

Plant fossil remain

macro- and meso-fossils-embryophytes except wood

Comments

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