The mob spawning definitions backported from the latest release of Mineclonia are not correctly implemented. They combine new-style biome names with old-style ones, while the new biome system does not exist in this fork, and define numerous methods which are not invoked by the (rotten) reimplementation of the new spawning system in spawning.lua.
You are advised either to backport spawning.lua in its entirety or to write your own spawning system.
The mob spawning definitions backported from the latest release of Mineclonia are not correctly implemented. They combine new-style biome names with old-style ones, while the new biome system does not exist in this fork, and define numerous methods which are not invoked by the (rotten) reimplementation of the new spawning system in spawning.lua.
You are advised either to backport spawning.lua in its entirety or to write your own spawning system.