Cymbosporites opacus
- Citations total:
- 2
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| original | Middle Givetian | Canada(Arctic) | McGregor,D.C. et al. Middle Devonian miospores from the Cape de Bray, Weatherall, and Hecla Bay Formations of northeastern Melville Islad, Canadian Arctic. | 1982 | |
| details | Late Emsian | Early Eifelian | Canada(Arctic) | Uyeno,T.T. Biostratigraphy and conodont faunas of Upper Ordovician through Middle Devonian Rocks, eastern Arctic Archipelago | 1990 |