Which type of wood-destroying organism primarily feeds on cellulose?

Termites are known as cellulose feeders because they primarily consume cellulose, which is a major component of plant cell walls found in wood and other plant materials. This ability is largely due to their symbiotic relationship with microorganisms in their guts that help break down the tough cellulose fibers. As a result, termites play a significant role in recycling nutrients in ecosystems, but they can also cause extensive damage to wooden structures when they invade homes or buildings.

In this context, fungi, while they do decompose wood, primarily break down lignin and other components of plant materials, rather than directly feeding on cellulose like termites do. Cockroaches and beetles also have different feeding habits; for example, many cockroaches are omnivores and tend to eat organic matter rather than specializing in cellulose. Certain beetles may feed on wood, but they do not exclusively target cellulose in the way termites do, making them less aligned with the focus of this question.