A new, sibling, tree frog from Jerusalem (Amphibia: Anura: Hylidae)∗

A new, sibling, species of tree frog of the Hyla arborea group is described from Jerusalem and the adjacent Judean hills. Hyla heinzsteinitzi sp. n. differs from the sympatric common H. savignyi of the Middle East in head shape, as the head is relatively wider and the snout more truncate; in call structure, as in each segment of its advertisement call the energy peaks abruptly near the segment's onset; and in colouration, as its dark lateral band is highly disrupted. In at least one of the H. heinzsteinitzi populations the frogs' green‐phase colour is turquoise rather than green. The distinction of the two species is demonstrable by Principal Coordinate Analysis. Hyla heinzsteinitzi seems to be endemic to a small area within the range of distribution of H. savignyi; here the two are sympatric and at least sometimes apparently syntopic. The ecological relations of the two are unknown. The new species is probably endangered.