Triculines form a wholly aquatic group exhibiting today an amazing adaptive radiation of three tribes, over 20 genera and more than 120 species.
Many of the common genera of mature forests in the area occurred in the stands 10 y and older.
All habitats pooled, these two families included together 24% of all species and 28% of genera.
Quite detailed correlations are not possible yet, but one can clearly see a westward diachronism in the first occurrence of some ammonoid genera.
The high biodiversity of tropical forests is due in large part to species-rich genera with coexisting closely related species.
Within genera, however, flight heights were not strongly differentiated among species.
Contrastingly, when dealing with monospecific genera with identifiable pollen types, the palynological record provided a closer match t o t he actual vegetation changes.
In the 15 plots of 0.1 ha established in the well-drained uplands, 81 families, 310 genera and 1124 species were found.
