[2][4] The holotype, of unknown sex, measures 50 mm (2.0 in) in snout–vent length (the specimen is somewhat dehydrated was not dissected to avoid damage).

[2] This species is only known from the holotype that was collected in 1971 from the top of Cerro Autana at 1,250 m (4,100 ft) above sea level, during the first expedition to this tepui.

[2][5] The summit is dominated by an open swampy landscape with submesothermic herbaceous vegetation.

The specimen was found within the tubular rolled leaves of a Brocchinia bromeliad.

[5] Although the International Union for Conservation of Nature (IUCN) has assessed S. breweri as vulnerable,[1] Barrio-Amorós and colleagues (2019) suggest that it should rather be classified as "critically endangered" because only single specimen is known (despite later expeditions involving herpetologists) and because the available habitat is very restricted (the summit is 1.9 km²).