Are you interested in literature suggestions for help with identification or someone more familiar with Niger Delta geology? For help with identification, I could suggest some AASP publications that focus on fungal remains.
Here is a list of AASP publications on their website: http://www.palynology.org/content/publist.html . I do not have them digitally, but you should be able to obtain them at your university library. It is unclear from your note what you need exactly, but one I recommend on this list: Synopsis of Fossil Fungal Spores, Mycelia, and Fructifications. AASP Foundation Contributions Series No. 39 R. M. KALGUTKAR & JAN JANSONIUS. 2000. 428 pages, 36 pages of line drawings.