Nucleus Type III (Brown 2055) ready to ship formicarium the Atrium is larger (in

the Atrium is larger (in terms of available nest space) than the Casita and would be in between the Casita and Nucleus III in terms of nest space

highly scratch resistant and greater clarity

4x4" lid opening

XL Nest Size - 4 5/8" x 1 13/16 x 1 3/4"

Medium/Large Species size tunnels and chambers

Nucleus Type III (Brown 2055) ready to ship formicarium the Atrium is larger (in***Please visit our Main Nucleus Type III Page here*** Includes Nucleus III formicarium and all accssories. The Nucleus III is made out of our proprietary Type III material Option Museum Glass Option Removable Vent (Lid on a lid, exposes a 1" opening) 3 Water Towers for long term hydration 2 Nestmates for drinking water inside the nest area (Included at no additional charge for this formicarium)($10 Value) one 3 8" connection port ***Copyright 2025