• Dentoglobigerina taci Pearson and Wade, 2015:18-19, figs. 18.1, 18.2, 18.4, 19.1-19.9 [lower Oligocene Zone O1, TDP Site 17, Tanzania], 18.3, 18.5 [upper Eocene Zone E15/16, TDP Site 12, Tanzania].

According to Pearson and Wade (2015), taci is morphologically and evolutionarily intermediate between D. galavisi and D. tapuriensis. [Wade et al. 2018]

Dentoglobigerina taci is similar in gross morphology to D. galavisi but has a more open umbilicus and lacks the irregular triangular lip projecting over the umbilicus that is part of the diagnosis of D. galavisi sensu stricto (Blow, 1979; Olsson and others, 2006). Unlike D. galavisi it generally has a lip of relatively constant thickness rather than a tooth, and a rectangular umbilical depression rather than triangular in D. galavisi. This species differs from D. prasaepis by its less compressed chambers and square (rather than rectangular) umbilicus and from D. pseudovenezuelana principally by having a more open umbilicus than is normally seen in that species and by lacking the densely pustulose umbilical ornamentation characteristic of that species. It differs from D. tapuriensis principally by lacking the broad final chamber and broad, low aperture that is characteristic of that species (modified from Pearson and Wade, 2015). Dentoglobigerina taci is distinguished from Subbotina eocaena by its less globular chambers and more open, higher arched aperture.

Dentoglobigerina taci is morphologically similar to Globoturborotalita cancellata (Pessagno), but differs by having broader chambers, giving the test a squarer and less lobate outline, and the final chamber overhangs the umbilicus, as is typical in the genus. Its also has a less cancellate wall texture (see Chapter 8, this volume, for discussion and SEM images of G. cancellata). [Wade et al. 2018]