English: The genus Scapholeberis differs from other daphnids both in its exterior habitués and by its behaviour, however its anatomical details have the same peculiarities which are characteristic for this family. The head bends forward and is almost a continuum of the dorsal edge of the carapace. Quite often the anterior part of the head (forehead) is armoured with an upward turned horn. Sars described this variant as a true species, S. cornuta. Posteriorly the ventral edge of the carapace ends up in a strong spine. Its postabdomen has much in common with the postabomen found in Ceriodaphnia sp. S. mucronata has a dark colour, sometimes almost black. Female length is 0.6–1.4 mm and male length is 0.4–0.8 mm. This specimen was found in a city pond in the city of Rakvere in Estonia.