Leptognathiidae Sieg, 1976 * Author Bird, Graham J. text Zootaxa 2007 1599 61 85 journal article 10.5281/zenodo.178698 4752b142-888a-44bf-b0a3-210a24ff581a 1175-5326 178698 Anarthruropsis langi Kudinova-Pasternak, 1976 Anarthruropsis langi Kudinova-Pasternak, 1976 : 121 –123, fig 3. Remarks. Although not recorded in the recent Japanese surveys, this species has been recorded from the northern part of the Kurile-Kamchatka Trench, at hadal depths, 7795–8015 metres. The complex and varied spiniform setae on pereopods 3–6 distinguish it from A. longa , as well as its shorter pereonites 4–5.