|Limnonectes cintalubang, new species (KUHE 47859)|
The new species, Limnonectes cintalubang is subterranean and all specimens were found at night near burrows on the forest floor. When disturbed they immediately disappeared down the burrow. However, they do not seem to dig the hole by themselves, instead they use burrows constructed by other animals. What species dig the burrows used by this frog is unknown. The skin of the species is exceptionally fragile and tears easily when captured. The eggs of L. cintalubang are creamy white unlike other congeners. Among Bornean frogs creamy white eggs without dark animal hemisphere are known in several genera and all of them breed in deep shaded microhabitats such as small underground streams, in mud, and under leaf litter on the bottom of deep pools. The authors hypothesize that, L. cintalubang lays its eggs shaded localities, possible in water in the burrows.
Limnonectes cintalubang was found in loose slopes of secondary forests with mixed bamboo and broad-leaf trees, always on the ground. The surface of the ground is flat and sparsely covered by dead leaves, but with plant roots and stones densely packing the shallow layers under the soil surface. Frogs were active after 1930 h and each stayed near a burrow up to ca. 5–10 cm in diameter with a long tunnel at a depth of 50–60 cm, it was impossible to dig out the frog. Although only one of about 20 burrows observed had underground water, there was no pool at the immediate vicinity of the holes. The nearest water body was a stream ca. 8–12 m apart from the area. Males did not call in March, July, or December at the type locality. However, females collected in early July possessed large ovarian eggs, the breeding season is thought to include summer seasons. Other species found in association with the present new species in the forest were: Leptolalax gracilis (Günther, 1872), Leptolalax sp., Meristogenys jerboa (Günther, 1872), Nyctixalus pictus (Peters, 1871), and Polypedates leucomystax (Gravenhorst, 1829).
Matsui, M., Nishikawa, K., & Eto, K. (2014). A new burrow-utilising fanged frog from Sarawak, East Malaysia (Anura: Dicroglossidae). RAFFLES BULLETIN OF ZOOLOGY, 62, 679-687.