Cyathotrachus bulbaceus Graham
Plant Fossil Names Registry Number: PFN000280
Act LSID: urn:lsid:plantfossilnames.org:act:280
Authors: R. Graham
Reference: Graham, R. (1934): Pennsylvanian flora of Illinois as revealed in coal balls. I. – Botanical Gazette 95(3): 453–476., link
Page of description: 459
Illustrations or figures: figs 13–15, pl. 8, figs 28. 29
Name is type taxon for
Sporangia four to six, attached basi-laterally to a short central column, their bases completely united to form a saucer-shaped receptacle. The sporangia are united laterally for the greater part of their length by a common wall, a deep cup being left at the summit of the synangium. Synangia pedicellate and bulblike in shape, measuring about 0.65 mm. in diameter. Spores are 18 μ in diameter.
The geologic horizon from which these petrifactions were obtained is about Middle Conemaugh in age, and is near the top of the Pennsylvanian strata found in Illinois.
Upper Pennsylvanien according to Millay (1977: Amer. J. Bot., 64(2): 223).
Calhoun coal mine, Richland County, Illinois
Plant fossil remain
macro- and meso-fossils-embryophytes except wood