Description
The Hula painted frog has a dark belly with small white spots. It is colored ochre above with a rusty colour grading into dark olive-grey to greyish-black on the sides. Differences from the common painted frog (Discoglossus pictus) include its greater interocular distance, longer forelimbs, and a less projecting snout. The type specimen was an adult female with a body length of 40 mm.
Little is known about its history, because few specimens have been found by scientists. Two adults and two tadpoles were collected in 1940 and a single specimen was found in 1955. This would prove to be the last record of this species until 2011.
The four 1940 specimens were to be used as types, but the smaller, half-grown frog was eaten by the larger one in captivity. The latter eventually became the holotype (HUJZ Amphib. Discogl. 1) for the species' description and this or the individual collected in 1955 apparently is the only material remains of the species known today; the two tadpole paratypes (HUJZ Amphib. Discogl. 2 and 2a) appeared to have been lost.
According to an ecologist of the Israel Nature and Parks Authority, the frog's Hebrew name, agulashon shehor-gahon (Black-bellied round-tongued), derives from its black belly and round tongue. The scientific name of the species reflects these details as well. Unlike the tongues of other frogs, it is not used to catch prey.
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