A review of the Japanese Cryptochironomus Kieffer, 1918 (Diptera, Chironomidae) Author Yan, Chuncai Author Liu, Ting Author Cao, Wei Author Zhao, Guangjun Author Liu, Wenbin text ZooKeys 2018 771 139 155 http://dx.doi.org/10.3897/zookeys.771.24220 journal article http://dx.doi.org/10.3897/zookeys.771.24220 1313-2970-771-139 E0070C6D62DE4AE1B87D86AC63BEC27B Cryptochironomus jokaprimus Sasa & Ogata, 1999 Cryptochironomus jokaprimus Sasa & Ogata, 1999: 86; Sasa and Suzuki 2001: 2. Material examined. Japan. Holotype, ♂ (No. 321: 37), at the side of a stream discharging water (the Kurobe Municipal Sewage Treatment Plant (Kurobe Joka Center)), in urban areas of Japan, 27.viii.1996, light trap. Diagnostic characters. Frontal tubercles prominent, roughly conical. Tergite IX rounded at the posterior margin. Anal point concave in its median portion, and parallel-sided to the apex, apically rounded. Superior volsella narrow at base and strongly expanded distally, bearing five strong setae, inferior volsella semicircular, gonostylus with small protrusion at apex. Distribution. Japan.