Modern pollen types, Ghana.
Explanation of codes:
'Pollen types were assigned codes, for example the 3rd grain (G3), photographed in Slide 28 (S28), Kogyae 2014 (K14), Transition vegetation plot (T), Trap 55 (T55) would be S28K14TT55G3. Types were numbered sequentially from 1 upwards, and Holotypes (sets of images which acted as a standard for that pollen type) were designated. Holotypes were designated when the grain being photographed met the standards outlined below:
- images of only one grain
- includes both polar and equatorial views
- includes a scale bar
- grain not damaged
- images clear enough to see the diagnostic features of the grain such as pore shape and wall structure
When a new grain was found which did not meet the criteria to be designated as a holotype, it was photographed and given only a code, not a Type number, until a grain of the same morphotype was observed which could then be photographed as the holotype for that type. Pollen taxa were counted using their Type numbers, and taxonomic information was assigned to Types when this information became available.'
Where identifications are present, they are from:
William D. Gosling, Charlotte S. Miller, Daniel A. Livingstone, Atlas of the tropical West African pollen flora, Review of Palaeobotany and Palynology, Volume 199, 2013, Pages 1-135, ISSN 0034-6667, http://dx.doi.org/10.1016/j.revpalbo.2013.01.003.
Annie Vincens, Anne-Marie Lézine, Guillaume Buchet, Dorothée Lewden, Annick Le Thomas, African pollen database inventory of tree and shrub pollen types, Review of Palaeobotany and Palynology, Volume 145, Issue 1, 2007, Pages 135-141, ISSN 0034-6667, http://dx.doi.org/10.1016/j.revpalbo.2006.09.004.
Riollet G, Bonnefille R. 1980. Pollens des savanes d’Afrique orientale. Paris: Éd. du Centre national de la recherche scientifique. Paris.
van Campo M. 1974. Pollen et Spores d’Afrique tropicale. Talence: Association des Palynologues de Langue Francaise.
Ybert J-P. 1979. Atlas de pollens de Côte d’Ivoire [Internet]. Paris: ORSTOM; [cited 2017 Feb 21]. Available from: http://www.documentation.ird.fr/hor/fdi:09859