Okay, I'm thinking it might be easier to put the information about the Hive organisation and the various castes into an "Isopterite Hives" subentry, leaving the individual descriptions containing only the bare minimum background and information specific to the caste.
So, for our critter, we're talking something like:
Isopterites are a race of "termite men" that live in vast hives they build underground or in the trunks of giant trees (see Isopterite Hives for details). There are many castes of isopterite, one of which is the isopterite warrior described here. Isopterite warriors are the only caste that routinely engages in combat. They will resolutely fight to the death in defense of their hive.
An isopterite's every action is coordinated via telepathic signals that pass through the hive's queen. The queen does not command her subjects, but acts as a central relay for the isopterites' hive mentality. Should the queen be slain, the surviving isopterites wander purposelessly until a new queen establishes herself. Until this happens, the isopterites will only act out of self-preservation, fleeing or fighting if their life is threatened.
A warrior isopterite stands about 12 feet tall and weighs about 1,800 pounds.
Combat
An isopterite warrior attacks with its claws and acid spit. Isopterite warriors will fight to the death to defend their colony, flawlessly coordinating their tactics through the isopterite hive mind. Their preferred approach is overwhelming the enemy with flanking attacks.
ISOPTERITE HIVES
Additional information.
ISOPTERITES IN SPELLJAMMER
Additional information.