Early M iocene M ollusca from M c M urdo S ound, A ntarctica ( ANDRILL 2 A drill core), with a review of A ntarctic O ligocene and N eogene P ectinidae ( B ivalvia)

R etrotapes andrillorum sp. nov., H iatella cf. arctica ( L innaeus, 1767), ? Y oldia sp. (internal mould) and six taxa of P ectinidae are reported from the B urdigalian section of the ANDRILL 2 A core, drilled in M c M urdo S ound, R oss S ea. The pectinids are A damussium cf. jonkersi Q uaglio et al ., 2010, A ntarctipecten gen. nov. alanbeui ( J onkers, 2003), A ustrochlamys forticosta sp. nov., A ustrochlamys cf. marisrossensis J onkers, 2003, R uthipecten gen. nov., sp. nov. (not named) and a fragmentary specimen representing an unnamed genus and species. In a revision of A ntarctic P ectinidae, A ustrochlamys J onkers, 2003, R uthipecten gen. nov. (proposed for C hlamys ( Z ygochlamys ) tuftsensis T urner, 1967, reported only from W right V alley and the V estfold H ills, not present in ANDRILL 2 A ), L eoclunipecten gen. nov. (proposed for A ustrochlamys gazdzickii J onkers, 2003, reported only from O ligocene rocks of K ing G eorge I sland, not present in ANDRILL 2 A ) and the unnamed genus in ANDRILL 2 A are assigned to subfamily C hlamydinae, tribe C hlamydini, whereas A damussium T hiele, 1934 and A ntarctipecten gen. nov. are assigned to subfamily P alliolinae, tribe A damussiini. The diverse P ectinidae in ANDRILL 2 A suggest sea temperatures roughly 5°C warmer than at present in the R oss S ea during E arly M iocene time.