Bivalves from the latest Jurassic-earliest Cretaceous hydrocarbon seep carbonates from central Spitsbergen, Svalbard Author Hryniewicz, Krzysztof krzysztof.hryniewicz@nhm.uio.no Author Little, Crispin T. S. earctsl@leeds.ac.uk Author Nakrem, Hans Arne krzysztof.hryniewicz@nhm.uio.no text Zootaxa 2014 2014-09-02 3859 1 1 66 journal article 4900 10.11646/zootaxa.3859.1.1 d866af6f-cbcd-47f4-a4f3-1499c1789ae3 1175-5326 4930112 24FCAAE1-AB7C-4FAD-8698-D0C9F12400EC Genus Buchia Rouillier, 1845 Type species . Avicula mosquensis von Buch, 1844 Buchia spp. 2011 Buchia sp. —Hammer et al. , fig. 7i, tab. 2. Material examined. 156 specimens . See Appendix 1 for the list of specimens. Remarks. Species of the genus Buchia are considered valuable index fossils in Oxfordian to Hauterivian strata and are used for biostratigraphic subdivisions (e.g. Jeletzky 1966 ; Kauffman 1973 ; Zakharov 1981 ; Surlyk & Zakharov 1982 ). The Svalbard seep buchiids probably represent Buchia okensis (Pavlow, 1907) , Buchia volgensis ( Lahusen, 1888 ) and Buchia cf. inflata ( Lahusen, 1888 ) . A separate paper is planned to formally describe them, and their stratigraphic significance in relation to the ammonite stratigraphy of Wierzbowski et al. (2011) . Palaeoecology. Buchia species were epifaunal byssally attached suspension-feeders (e.g. Wignall & Pickering 1993 , fig. 7), often clustering around hard structures (e.g. shells, rocks) providing a substrate for byssal attachment ( Fürsich 1982 ). The species of the genus had a broad ecological tolerance and were present in a variety of shallow to deep marine facies (e.g. Sokolov & Bodylevsky 1931 ; Håkansson et al. 1981 ; Fürsich 1982 ; 1984 ; Oschmann 1988 ; Kelly 1984 ; Wignall & Pickering 1993 ) and are suggested to have been opportunists ( Fürsich 1984 ; Wignall 1990 ).