Telmatobius culeus is found exclusively in the Lake Titicaca basin, on the border of Peru and Bolivia, altitude 3812 m. Found on the eastern coast of Lake Titicaca and into the connected Lago Pequeño (Benavides et al. 2002; Benavides 2005; Vellard 1992; de la Riva et al. 2010). The species is absent from shallow portions of the southern portion of the lake and from Laguna Arapa and Bahía de Puno in the northern basin (Benavides et al. 2002).
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