Omphalophloios wagneri Opluštil, Pšenička et Bek

Plant Fossil Names Registry Number: PFN000852


Authors: S. Opluštil, J. Pšenička & J. Bek

Rank: species

Reference: Opluštil, S., Pšenička, J. & Bek, J. (2019): Omphalophloios wagneri sp. nov., a new sub-arborescent lycopsid from the middle Moscovian (Middle Pennsylvansian) of the Illinois Basin, USA. – Review of Palaeobotany and Palynology 271: 104105 (25 pp.).

Page of description: 21

Illustrations or figures: pls I–XIV


Holotype USNM 536592, National Museum of Natural History, Smithsonian Institution, Washington, D.C., United States
Figures: pl. II, pl. III, figs 1–3

Note: Repository as "Department of Paleobiology, National Museum of Natural History, Washington DC, USA" in Opluštil et al. (2019: Rev. Palaeobot. Palynol., 271: 104105, p. 21).

Original diagnosis/description

Fertile axes bifurcating several times. Sporangia smooth, circular to oval, helically arranged, densely spaced on dichotomously branched fertile axes/apices. Sporangia with differentiated cells, equatorial cells elongated. Megasporangia and microsporangia of the same size, 2.5–3.1mmin diameter, alternating in irregular patches. Sporophyll base extended,with ciliatemargin. Laminae grass-like, with two sclerenchymatous belts and prominent midrib, generally long but becoming short at apices. Pedicels narrow, straight, winged. Trilete circular, oval to subtriangular cingulate microspores. Sculpture of proximal and distal surface irregularly microspinate, microverrucate, microgranulate, spinate, granulate, verrucate, baculate, and foveolate. Trilete circular to subtriangular coronatemegaspores. Subequatorial corona consisting of several layers of appendages. Laesurae very high, narrow, sinuous, extending to the innermargin of corona. Contact faces laevigate, irregularly tuberculate, granulate and spinate. Distal surface laevigate with irregularly cylindric to clavate appendages of corona.


In honor of Robert H.Wagner from Córdoba, Spain, who was the first to combine the vegetative and fertile remains of Omphalophloios, and suggested the first whole-plant reconstruction.


Carboniferous, Pennsylvanian, Moscovian
Mudstone in roof of the Lower Block Coal, Brazil Formation (Atokan, ~ Bolsovian)


United States
The USNM locality 38335: Nerco Coal Company, Indian Pit, about 1.7–2.0 km NW of Alfordsville, Daviess County, Indiana

Plant fossil remain

macro- and meso-fossils-embryophytes except wood


Use comments to notify PFNR administrators of mistakes or incomplete information relevant to this record.