Hystrichosphaeridium striatoconus Deflandre and Cookson, 1955

Now Conosphaeridium. Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly Litosphaeridium?, fourthly (and now) Conosphaeridium.
Hystrichosphaeridium striatoconus was a nomen nudum in Deflandre and Cookson, 1954.

Holotype: Deflandre and Cookson, 1955, text-fig.36
Locus typicus: Gingin, W Australia
Stratum typicum: Middle Senonian

Original description: Deflandre and Cookson, 1955, p.275
Shell rather robust and thick-walled, globular to sphaeroidal, ornamented with about 20 bluntly pointed conical processes, the apex of which is normally closed but is frequently broken off, leaving a direct poening in the process. Each cone is provided with a number of strong ribs that are thicker at the base and tapper towards but do not reach the apex; some of the ribs extend to about half the hight of the cone, others stop 3-4 Ám from the summit. The shell generally has a polygonal or rounded opening. Surface of shell smooth.
Dimensions: Shell alone 52-57 Ám, cones 12-18 Ám.