Mollusks from late Mesozoic seep deposits, chiefly in California Author Kaim, Andrzej Author Jenkins, Robert G. Author Tanabe, Kazushige Author Kiel, Steffen text Zootaxa 2014 3861 5 401 440 journal article 42509 10.11646/zootaxa.3861.5.1 0b368704-d9cc-4a82-8248-bc4c06dcf781 1175-5326 252462 E62DB6C3-0C5F-4898-99C4-1BEC70DD1734 Atresius liratus Gabb, 1869 ( Fig. 8 D, I) Material and occurrence. Many specimens from Rocky Creek (probably Valanginian, Early Cretaceous) including single moderately well preserved juvenile shell (GZG.INV.84993). Remarks. Atresius liratus has been of uncertain taxonomic position so far (see Kiel et al. 2008b for a review). The extraordinarily similar shell morphology of this species to the Recent bone eating abyssochrysoid Rubyspira osteovora Johnson et al. 2010 led to a suggestion that they may be related ( Johnson et al. 2010 ). Indeed, even the juvenile shells are somewhat similar, although the juvenile shell of A. liratus is most reminiscent of the coeval Paskentana humerosa (compare Fig. 8 D, I and 8E, J herein). Therefore, we consider Atresius to be a member of the newly established family Paskentanidae fam. nov. Clarifying the relation between Atresius (and Paskentanidae) and Rubyspira requires further research and collection effort.