Thalassionema bifurcum sp. nov., a new stratigraphically important diatom from Pliocene subantarctic sediments
2018
Kato, Yuji | Suto, Itsuki
A new diatom species Thalassionema bifurcum Kato et Suto is described from Pliocene subantarctic deep-sea sediments (DSDP Site 513 and IODP Site U1371). The stratigraphic occurrence of T. bifurcum is likely to be confined to the early Pliocene and shows remarkably high abundance (often comprising 50% of the total diatom assemblage). It can be easily distinguished from other Thalassionema species by its bifurcated apices. Considering the short stratigraphic range and its unique morphological character, this taxon seems to be a useful stratigraphic marker to identify the early Pliocene in Southern Ocean sediments.
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