Fig 1
Fig 2
Fig 3
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Family : MICROHYLIDAE
Species : Microhyla (Nanohyla) petrigena
Size (snout to vent) : Female 1.8 cm, Male 1.6 cm This stunning, but tiny,
frog occurs in moist lowland rainforests of Borneo. It congregates at swampy
pools or flooded areas and may be found either resting on the substrate or
clinging to nearby vegetation.
Its patterning is most attractive, comprising complex arrangements of dark
brown patches on its back and legs, edged with pale yellow or orange and set
against a brown or purplish-brown background. There are black patches near
the ankles and sides of the thigh, and a distinctive oblique pale stripe
below each eye.
The hindlimbs are robust and strong, while the forelimbs are quite slender.
The forefeet have only three toes.
Reaching a maximum size of just 18 mm, this species is one of the smaller
species of Chorus Frog (or Narrow-mouthed Frog).
Microhyla petrigena only occurs in Borneo.
Fig 1 : Resting on
silty sediments in a swampy area.
Fig 2 : Dorsal view showing typical patterning.
Fig 3 : Side view - note there are just 3 toes on the forefeet.
All images taken in Danum Valley, Sabah, Borneo.
References :
Manthey U., Grossmann W., 1997. Amphibien und Reptilien Sudostasiens. Natur
und Tier - Verlag.
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