heaolus
Heaolus is a fictional taxon used in speculative biology to illustrate possible evolutionary trajectories between aquatic vertebrates and terrestrial tetrapods. It is not a genus or species described in scientific literature and has no official standing in taxonomy. The term appears in educational simulations, speculative essays, and some science fiction as a thought experiment about how transitional forms might appear under different ecological pressures.
The name heaolus is a constructed coinage; there is no established etymology in formal taxonomy. In hypothetical
Described habitats vary, but the consensus in speculative works places heaolus in coastal lagoons, estuaries, or
Uses of the concept include illustrating the difficulty of identifying transitional forms from incomplete fossil records,