Callixylon sp
- Citations total:
- 2
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| details | Early Mississippian | Ohio | Winslow,M.R. Plant spores and other microfossils from Upper Devonian and Lower Mississippian rocks of Ohio | 1962 | |
| details | Late Devonian | Ohio | Chitaley,S.D. et al. A preliminary report on the microflora of the Cleveland Shale, Ohio. | 1986 |