Diospyros oblongicarpa Gürke Maba oblongicarpa (Gürke) Prain Isolona zenkeri is a species of plant in the Annonaceae family.

It is found in Cameroon, The Republic of the Congo and Gabon.

[2] Adolf Engler, the German botanist who first formally described the species, named it after Georg August Zenker who collected the sample Engler examined.

[3] Its natural habitat is subtropical or tropical moist lowland forests.

Its leaves are 20-25 by 7-9 centimeters and come to a point at their tip.