Notes on the topotype and deep-sea specimens of the planktonic foraminifer Cassigerinelloita amekiensis Stolk

Abstract

Abstract. Specimens of Cassigerinelloita amekiensis Stolk from the type collections and DSDP/ODP holes are found to possess a microperforate and pustulate wall and a triserial, pseudoplanispiral coiling mode. These characters prompt its affinity with the contemporaneous Guembelitria triseriata (Terquem). An amended description of Cassigerinelloita amekiensis is given, and the peculiar coiling mode discussed.