Species not occuring together in a geographical region .
Biomes are the largest geographical biotic community division.
They broadly correspond with climatic regions, and major plant formations, but are defined in terms of all living organisms and of their interaction with the environment. Some examples are desert biome, tropical rain-forest biome and tundra biome. Caudal - Referring to the tail. A split produces two distinct new taxa, each of which is represented as a branch in a phylogenetic diagram. The parent taxon always gives rise to two daughter taxa which must be given different names from each other and the parents, so the parent species ceases to exist.