The specific epithet lakolosy is a Malagasy word meaning "bell", chosen to describe the species' advertisement call, which sounds like a ringing bell.[1]
Description
The species’ dorsal color pattern is dark brown with mottling in golden-olive and small whitish dots. The flanks are dark with irregular white spots and blend diffusely into the dorsal coloration without a sharp border. On the underside of the legs, there are alternating bands of light brown and dark brown. A thick frenal stripe is present. The species lacks dermal fringes or spines.[1]
The holotype has a snout-vent length of 21.8mm (0.86in). The body is slender, the head is longer than wide, and the snout is rounded in dorsal view and pointed in lateral view. The tympanum is distinct and rounded. Fingers and toes have enlarged disks, with fingers unwebbed and toes having rudimentary webbing. The skin on the dorsum is smooth.[1]
Distribution and habitat
The species is reliably known only from Miranony Forest (1,100m (3,600ft) elevation) within Ranomafana National Park in Fianarantsoa province, Madagascar. It inhabits undisturbed, primary high-altitude rainforest, where individuals are found perched on low vegetation or mossy rocks near fast-flowing streams.[1]
Ecology
The advertisement call consists of a series of regularly repeated, short, bell-like tonal notes. In a recorded series, calls consisted of 7–10 notes, had a duration of 562–1150 ms, and a dominant frequency of 2454–2497 Hz. Note duration was 67–105 ms.[1]
Conservation status
The species is proposed for categorization as Endangered under IUCN criteria due to its very restricted distribution (a single location), ongoing habitat fragmentation, and threats from slash-and-burn agriculture and forest product extraction within Ranomafana National Park.[1]
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