Pristimantis altae, also known as mountain robber frog, is a species of rain frog in the family Strabomantidae with a bright coral-coloured groin. It is found in Costa Rica and Panama. Taxonomy The species and its defining holotype were first collected on the Atlantic slope of Costa Rica below the highest reach of a mountain pass between Barva and Irazú at approximately 4000 feet (2860m), on a mountain slope in El Guarco, Cartago Province. It was formerly known as Eleutherodactylus altae and was classified in the subgenus Eleutherodactylus by John D. Lynch in 1996. Hedges, Duellman and Heinicke classified it under subgenus Hypodictyon in 2008. Savage (1980) classified it in the Eleutherodactylus cruentus group (which was considered a subset of the E. unistrigatus group). Lynch and Duellman (1997) considered it to be in the E. unistrigatus group of the Eleutherodactylus (Eleutherodactylus) martinicensis series. Savage (2002) placed it in the E. cruentatus group of his newly redefined E. martinicensis series. Hedges, Duellman, and Heinicke (2008) then placed it in the Pristimantis (Hypodictyon) ridens series. Padial, Grant, and Frost (2014) finally recommended not to attempt placing it in a species grouping. Description This is a small frog; the males measure to 23.5mm, while the females 27mm. The back is covered in tiny bumps and the colour of it can vary from dark grey to black, sometimes but not always with tiny white speckles. The stomach and lower surface is dark brown. The eye has a copper-coloured iris. This species is distinguished by its bright coral-coloured groin. This colour extends up the front of the thigh in the form of dots, and also on the rear thigh as dots in a slightly more reddish-orange colour. This frog is thought likely to not make a mating call. It has a karyotype of 2n = 26. Distribution It occurs throughout the northern section of the Cordillera Central of Costa Rica at mid-altitudes, and throughout the eastern Caribbean seaboard of this country, on the slopes of the Cordillera de Talamanca down to almost sea level, from near the Nicaraguan border southward to north-westernmost Panama in La Amistad International Park. It was initially believed it to be endemic to Costa Rica. Ecology The habitats favoured by Pristimantis altae are tropical, humid, lowland and premontane forests and rainforests. It has been found at elevations of 60 to 1245m. According to Savage (2002), himself citing earlier studies, this species