The tadpole of Leptobrachium (Vibrissaphora) echinatum (Amphibia, Anura, Megophryidae)

The tadpole of Leptobrachium (Vibrissaphora) echinatum Dubois & Ohler, 1998 from northern Vietnam is described in detail with morphometric data. The internal oral features of this species are given. The comparison of this tadpole with three tadpoles of the closely related consubgeneric species, Leptobrachium (Vibrissaphora) ailaonicum, allowed to confirm the specific validity of Leptobrachium (Vibrissaphora) echinatum. A comparison with available bibliographic data for other tadpoles of the subgenus allowed us to place this species within the Leptobrachium (Vibrissaphora) boringii group together with Leptobrachium (Vibrissaphora) ailaonicum.