part of diencephalon posterior tuberculum 2020-09-24T11:30:44Z BTO:0006432 BrendaTissueOBO Marion The posterior tuberculum and the preglomerular complex are two dominant structures in the basal diencephalon of zebrafish, which also have no apparent counterparts in amniote tetrapods like birds and mammals. Yet, a large posterior tuberculum is present in jawless vertebrates (lampreys), cartilaginous fishes (sharks and manta rays), lungfish, and amphibians.