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Kleithriasphaeridium tubulosum
Kleithriasphaeridium tubulosum (Cookson and Eisenack, 1969) Stover and Evitt, 1978
Originally Conosphaeridium, subsequently (and now) Kleithrzasphaeridium.
Holotype: Cookson and Eisenack 1969: Figure 2E
Locus typicus: Balcatta Bore No. 1, Western Australia
Stratum typicum: Osborne Formation (Albian-Cenomanian)
Age: Albian-Cenomanian
Original Description: Cookson and Eisenack 1969, p. 5,7: Conosphaeridium tubulosum
Shell apparently circular in outline with relatively long, cylindrical to somewhat conical appendages with straight or slightly oblique openings, the edges of which are somewhat crenulate or serrate. The walls of the appendages are longitudinally striated, the thickenings frequently extending along the whole length of the wall. The wall of the shell is moderately thin, unpatterned and readily crushable.
Dimensions. Holotype: diameter of shell about 70µ overall diameter about 130µ appendages about 28-30µ long, 8-10µ wide. Range of appendages about 25-30µ long.
Comment. C. tubulosum differs from C. striatoconus in both the shape and size of the appendages. In C. striatoconus they are relatively short and conical whereas in C. tubulosum they are relatively long, cylindrical or only slightly conical.
Originally Conosphaeridium, subsequently (and now) Kleithrzasphaeridium.
Holotype: Cookson and Eisenack 1969: Figure 2E
Locus typicus: Balcatta Bore No. 1, Western Australia
Stratum typicum: Osborne Formation (Albian-Cenomanian)
Age: Albian-Cenomanian
Original Description: Cookson and Eisenack 1969, p. 5,7: Conosphaeridium tubulosum
Shell apparently circular in outline with relatively long, cylindrical to somewhat conical appendages with straight or slightly oblique openings, the edges of which are somewhat crenulate or serrate. The walls of the appendages are longitudinally striated, the thickenings frequently extending along the whole length of the wall. The wall of the shell is moderately thin, unpatterned and readily crushable.
Dimensions. Holotype: diameter of shell about 70µ overall diameter about 130µ appendages about 28-30µ long, 8-10µ wide. Range of appendages about 25-30µ long.
Comment. C. tubulosum differs from C. striatoconus in both the shape and size of the appendages. In C. striatoconus they are relatively short and conical whereas in C. tubulosum they are relatively long, cylindrical or only slightly conical.