Ameerega rubriventris is a small species of poison dart frog that lives in Peru in secondary wet forests described in 1997.[1] [2] It can be found at an elevation of 350–1000 m.
Ameerega rubriventris exhibits a dark black-brown coloration on its upper body, which may be adorned with marbled patterns in certain specimens, featuring cream or copper-colored stripes along the sides of its back. Additionally, it possesses a complete or fragmented cream or rosé-colored stripe on its lips. The dorsal region of the frog appears granular, as does the surface of its hind limbs, while the anterior limbs display slight granulation. Yellow spots can be observed above the armpits, groin, and calves, with the belly exhibiting a reticulated pattern in shades of red-black or orange-black. The limbs range in color from gray to brown, with some individuals displaying black reticulation. When the frog's fingers are pressed together, the first finger appears longer than the second. The palms and soles of Ameerega rubriventris are black-brown in color, and webbing is either absent or only rudimentary. Notably, this species lacks teeth.
The only sign of sexual dimorphism is that males are slightly smaller than females. Adult Ameerega rubriventris measures around 21.1–24.5 mm.