Bombina microdeladigitora — Overview

Hubei Fire Bellied Toad Or Yunnan Fire Bellied Toad learn more about names for this taxon

IUCN threat status:

Not evaluated

Comprehensive Description

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Description

Diagnosis: Bombina microdeladigitora is similar to B. maxima, but differentiated from the latter species by slight amount of webbing in the toes, black spines on the throat and chest being scattered in small groups, and black being the dominant color on the ventral side. Conversely, B. maxima has fully webbed toes and its ventral side is equally variegated in black and red.

Description: Body length of an adult male B. microdeladigitora holotype was recorded at 77 mm. The head is broader than long, tympana are hidden, and the arms are relatively long and fingers short with distinct fringes at their base, forming web-like structures. The dorsal skin of the head, body, and limbs is very rough and covered in warts. The snout and lateral sides of the head, body and limbs are much smoother. Four elongated warts form an X mark on the shoulder region (Liu et al. 1960).

Coloration: When alive, the dorsal side is greenish with dark black to brown marks along scattered warts, which can be both small and large. Black vertical bars mark the jaws and one wide black bar marks each thigh. A black color dominates the ventrum with fewer orange-red marks (Liu et al. 1950).

Coloration in Preservative: After preservation, the greenish color changes to dark grey and the brown and orange-red turns to white (Liu et al. 1960).

Bombina microdeladigitora was found to secrete two different serine protease inhibitors from its skin, and sequence analysis revealed that all serine protease inhibitors from five species of Bombina share highly conserved genes (Lu et al. 2007)

Phylogenetic Relationships: The genus Bombina is currently divided into three major clades: the European and Korean groups, which form a sister relationship, and the Indo-Malay clade to which B. microdeladigitora belongs (Zheng et al. 2009). Due to the low levels of genetic, morphological and karyological differences, it has been suggested that B. microdeladigitora and B. fortinuptialis be reassigned as subspecies of B. maxima (Yu et al. 2007).

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