Talk:Entoma Vasilissa Zeta/@comment-200.59.28.26-20181113003847/@comment-2A02:908:1871:2E00:E4D8:56D1:493C:FA0F-20181125090607

I think the main reason that Overlord is throwing insects and arachnids together is that the novel is loosely based on dungeons and dragons, which is doing the same. To be more specific: DnD has a vermin type for monsters.

From the DnD handbook:

Vermin Type: This type includes insects, arachnids, other arthropods, worms, and similar invertebrates.

Note how Evileyes spell is called Vermin Bane.

I guess for simplicities sake they otherwise just stuck with insect as a type to not confuse non DnD-players.