Dichotomous

Dichotomous: Dividing into two equal branches.
Diffusion: A process where heat or chemicals are transported in response to differences in chemical concentration or temperature.

Dichotomous Dividing into two equal branches.
Dioecious Having male or female flowers on separate plants.
Division Division of the vegetative point of Rosette plants into two or more parts for propagation.

Irregular to dichotomous branching. Colour is pinkish purple. Branches composed of thick, flattened segments. Heavily calcified.
Caribbean
Neogoniolithon spectabile
(Setchell and Mason) ...

> What I need is a good well designed dichotomous key for the Apistogramma. Does > such a thing exist (at least for the described species (or even the common > ones)?

pistillata grows by dichotomous fission of the branches, that mature colonies are spherical in shape overall and that broken branches regrow faster than unbroken branches such that the spherical shape of the colony is mostly reformed (13).

See also: Fish, Character, Species, Dorsal, Aquarium