Back
Hystrichosphaeridium recurvatum ssp. polypes
Hystrichosphaeridium recurvatum ssp. polypes Cookson and Eisenack 1962
Originally Hystrichosphaeridium recurvatum ssp. polypes, subsequently Cleistosphaeridium polypes, thirdly Bacchidinium polypes, fourthly Impletosphaeridium polypes, fifthly Kiokansium polypes. See also Polysphaeridium? polypes (combination not validly published).
Tax. sr. synonym of Kiokansium unituberculatum (Tasch, 1964) Stover and Evitt, 1978, according to Duxbury, 1983, Lentin and Williams, 1985, and Lentin and Williams, 1989. However, Davey, 1969, raised Hystrichosphaeridium recurvatum ssp. polypes to the species rank, as Cleistosphaeridium polypes. Therefore, at the species rank, Kiokansium unituberculatum is the tax. sr. synonym.
Tax. sr. synonym of Cleistosphaeridium? solidum Yun, 1981, according to Below, 1982.
Holotype: Cookson and Eisenack, 1962, pl.4, figs.11-13
Locus typicus: Victoria, Australia
Stratum typicum: Albian-Cenomanian
Original diagnosis: Cookson and Eisenack 1962, p. 491
Shell circular to subcircular in outline with fourty or more slender appendages of approximately uniform width throughout except for a slight broadening at the base; the tips of the appendages are fringed with short and straight or recurved processes, which divide once or twice into short, hair-like branches that are visibly only with the aid of an oil-immersion objective. The surface of the shell is finely granular. Dimensions: Over-all diameter ca. 52-99 µm; shell 33-57 µm; appendages ca. 15-25 µm.
Originally Hystrichosphaeridium recurvatum ssp. polypes, subsequently Cleistosphaeridium polypes, thirdly Bacchidinium polypes, fourthly Impletosphaeridium polypes, fifthly Kiokansium polypes. See also Polysphaeridium? polypes (combination not validly published).
Tax. sr. synonym of Kiokansium unituberculatum (Tasch, 1964) Stover and Evitt, 1978, according to Duxbury, 1983, Lentin and Williams, 1985, and Lentin and Williams, 1989. However, Davey, 1969, raised Hystrichosphaeridium recurvatum ssp. polypes to the species rank, as Cleistosphaeridium polypes. Therefore, at the species rank, Kiokansium unituberculatum is the tax. sr. synonym.
Tax. sr. synonym of Cleistosphaeridium? solidum Yun, 1981, according to Below, 1982.
Holotype: Cookson and Eisenack, 1962, pl.4, figs.11-13
Locus typicus: Victoria, Australia
Stratum typicum: Albian-Cenomanian
Original diagnosis: Cookson and Eisenack 1962, p. 491
Shell circular to subcircular in outline with fourty or more slender appendages of approximately uniform width throughout except for a slight broadening at the base; the tips of the appendages are fringed with short and straight or recurved processes, which divide once or twice into short, hair-like branches that are visibly only with the aid of an oil-immersion objective. The surface of the shell is finely granular. Dimensions: Over-all diameter ca. 52-99 µm; shell 33-57 µm; appendages ca. 15-25 µm.