Dirimion 7

Dirimon 7 was the home planet of the Nidilla, a race of giant spiders.

History
The Nidilla had evolved to their incredible size after wiping out most other creatures on their planet, never being challenged and never having seen such uncontrollable rage in such a rival until they met the Daleks. The Daleks landed on Dirimon 7 after clearing the five other planets in the Hanro system, sucking them dry of resources. Thousands of baby spiders scuttled all over their ships. Although the Daleks swiftly exterminated them, as they moved deep into the mountains that dominated the northern land mass, they came across the parent spiders and realised the true threat the Nidilla posed. After they had trapped several in their webs, the remaining Daleks opened fire. The battle was long and fierce, but the Nidilla were finally defeated. (DWBIT: #23)