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 Biarticulata tuberculata ( Hansen, 1913 ) Leptognathia tuberculata Hansen, 1913 : 82 –83, plate VIII figs 3a–f. Kudinova-Pasternak, 1966 : 532 [uncertain synonymy]. Kudinova-Pasternak, 1970 : 353 [uncertain synonymy]. Biarticulata tuberculata ( Hansen, 1913 ) : Larsen & Shimomura, 2007 : 19 . Remarks. This somewhat enigmatic species, originally described by Hansen ( op.cit. ) from material collected in the Davis Strait at depths of 2194–2625 metres has also been reported from the Kurile-Kamchatka Trench at 4895 metres by Kudinova-Pasternak (1970) and the central North Pacific, 6051 metres ( Kudinova-Pasternak 1966 ). It is very doubtfully placed in the Leptognathiidae as it is clearly either a species of Akanthophoreus or Chauliopleona , although it escaped the revision of both genera (the former as Paraleptognathia Kudinova-Pasternak, 1981 ) by Guerrero-Kommritz (2004 , 2005 ). It is a very slender species, one syntype from Ingolf Station 36 having a carapace 1.8 times as long as broad and with pereonites 2–5 all longer than broad. For additional comments on this species and Kudinova-Pasternak’s record see Bird, elsewhere in this publication.