Acrogenotheca ramificata Naugolnykh

Plant Fossil Names Registry Number: PFN001915

Act LSID: urn:lsid:plantfossilnames.org:act:1915

Rank: species

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

Page of description: 1388

Illustrations or figures: pl. 2, figs 1–6, pl. 3, figs 1–6, pl. 4, figs 1–6, pl. 5, figs 1–5, pl. 6, figs 1–5

Name is type for

Acrogenotheca Naugolnykh 2013

Types

Holotype 3773(11)/318(92), Geological Institute, Russian Academy of Sciences, Moscow, Russia
Figures: figs 5–7, pl. 2, figs 1–6, pl. 3, figs 1–6, pl. 4, figs 1–6, pl. 5, figs 1–5, pl. 6, figs 1–5

Original diagnosis/description

Homosporous eusporangiate fern with compound pinnate leaves with reduced leaf lamina or even without leaf lamina. Lateral veins with hydathods. Some lateral veins of last order segments (on average, two or three of nine–ten veins) having terminally positioned synangia, consisting of four marginally fused sporangia. Spores rounded or ovoid in outlines, monolete, with smooth sporoderm, about 25 μm in diameter.

Etymology

From the Latin ramificatus (branching), after branching lateral veins of fertile segments with a reduced leaf lamina.

Stratigraphy

Permian, Cisuralian, Kungurian

Locality

Russian Federation
Chekarda 1 locality, Bed 10

Plant fossil remain

macro- and meso-fossils-embryophytes except wood

Comments

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