A new amphipod from the depths of the Morca Sinkhole (Anamur, Türkiye): Gammarus morcae n. sp. (Amphipoda: Gammaridae), with notes on cavernicolous amphipods of Türkiye

A new Gammarus species is identified based on the specimens collected from Morca Sinkhole, which was discovered in 2019 Anamur District, South of Türkiye. Eleven individuals belonging to newly were siphon located at end sinkhole (-1260 m). The can be distinguished by following character combinations and morphological features: blind, colorless (unpigmented) completely setae-covered body. Setae are not only surfaces meta- mesosome segments, they also present head, coxal + epimeral plates, basal segments pereopods V VII. Some tiny formations (aesthetascs?) flagellar antenna I noted. mouthparts holotype male photographed, remaining extremities drawn detail. morphology compared with its relatives a list covernicolous amphipod Türkiye presented.