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 Genus Biarticulata Larsen & Shimomura, 2007 (restricted synonymy and bibliography) Tanais Latreille, 1831 (partim): G.O. Sars, 1877 : 347 , 370. Strongylura G.O. Sars, 1882 (partim): Norman & Stebbing, 1886 : 110 , 116–117. Cryptocope G.O. Sars, 1882 (partim): G.O. Sars, 1882 : 50 –51. Hansen, 1913 : 106 . Leptognathia G.O. Sars, 1882 ( partim ): Hansen, 1913 : 82 –83. Kudinova-Pasternak, 1965 : 82 . Kudinova-Pasternak, 1976 : 119 . Kudinova-Pasternak, 1977 : 120 . Kudinova-Pasternak, 1981 : 102 . Species included (Japanese waters, Kurile-Kamchatka Trench and Japan Trench species in bold): B. arctophylax ( Norman & Stebbing, 1886 ) , NE Atlantic; B. distincta ( Kudinova-Pasternak, 1981 ) , Central Pacific, 1600–1900 metres; B. elegans ( Kudinova-Pasternak, 1965 ) , Bougainville Trench, 7974–8006 metres; B. greveae ( Kudinova-Pasternak, 1976 ) ; B. mironovi ( Kudinova-Pasternak, 1981 ) , Central Pacific, 1735–2430 metres; B. parabranchiata ( Kudinova-Pasternak, 1977 ) , Palau Trench, 7000–7170 metres; B. parelegans ( Kudinova-Pasternak, 1970 ) ; B. tuberculata ( Hansen, 1913 ) ; B. voeringi ( G.O. Sars, 1877 ) , Arctic Ocean. Diagnosis (after Larsen & Shimomura 2007 ). Female . Leptognathiid with cheliped fixed finger and dactylus simple. Uropodal exopod two-articled. Remarks. Although deriving from a revision and splitting of the genus Leptognathia (Larsen & Shimomura op.cit .), this new genus is a pragmatic (and probably temporary) formation and is clearly polyphyletic, the only common feature among the largely disparate species being the bi-articulated uropod exopod. A significant problem faces potential revisers of Biarticulata , if no existing genus can accommodate transferred species, as no type species was designated.