Mollusks from late Mesozoic seep deposits, chiefly in California Kaim, Andrzej Jenkins, Robert G. Tanabe, Kazushige Kiel, Steffen Zootaxa 2014 3861 5 401 440 CHF8M Anderson, 1938 Anderson 1938 [151,686,1513,1539] Gastropoda Aporrhaidae Pseudanchura Animalia Littorinimorpha 20 421 Mollusca species biangulata   Description.The best preserved specimen (CAS 73132) is composed of six high-spired whorls. Two earliest are rounded with poorly visible ornamentation spiral riblets while the third whorl bears no ornamentation apart from strong median keel. The aperture and apertural extensions not preserved in the investigated specimens.   Material and occurrence.Two poorly preserved juvenile specimens ( CAS73132, 73133). Eagle Creek (Late Barremian, Early Cretaceous).   Remarks.  P. biangulatahas been reported from a couple of localities in the Ono area by Anderson (1938)and it remains uncertain whether they were seep locations or "normal" deep water sediments. Most likely the association of  P. biangulatawith seep carbonates is fortuitous as aporrhaids are gastropods typical for soft bottom marine environments during Mesozoic times and they have been found at various Jurassic to Paleocene seep deposits ( Kaim et al.2008b; Kiel et al.2010, 2013; Agirrezabala et al.2013).