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Hystrichokolpoma ferox
Hystrichokolpoma ferox (Deflandre, 1937) Davey, 1969
Now Florentinia. Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly Hystrichokolpoma, fourthly Silicisphaera, fifthly (and now) Florentinia.
This combination was not validly published in Williams and Downie, 1966, since these authors did not fully reference the basionym.
Holotype: Deflandre, 1937, pl.14 [al.pl.11], figs.3-4
Locus typicus:
Stratum typicum: Senonian
Emended diagnosis: Davey, 1969, p.159
Shell subspherical, densely granular or reticulate. Processes thin walled, granular, often striated, of three kinds: (i) 6 large precingular and 4 large postcingular, possessing wide bases and tapering distally giving rise to 2 or more tubules, typically open; (ii) a single long tubular antapical process and (iii) cingular and sulcal processes, of moderate length, slender and tubular, only joining
proximally if at all. Archaeopyle apical.
Dimensions: Holotype: length of shell 46 Ám, width 36 Ám, overall length 78 Ám,
length of processes 15-17Ám. Range of Cenomanian specimens: diameter of central body 39 (46.1) 56 Ám, maximum lcngth of processes 27 (30.2) 36 Ám. Number of specimens mcasured, 13.
Description: Davey, 1969, p.159
H. ferox appcars to be a fairly variable species. In some specimens the tabulation is not clearly indicated by the processes which tend to be smaller and may even be closed distally. However, the processes usually are well developed, their bases covering an area of the shell surface which is often slightly raised and of the same shape as a thecal plate. The precingular and postcingular processes are largest and give rise distally to as many as 10 tubules. Each cingular process divides proximally into 2 or 3 long slender tubules aligned along the cingulum. The sulcal processes may proximally divide into two tubules or may consist of a single tubule which is sometimes reduced and closed distally. The antapical process is long, tubular, open distaly and terminates with a smooth or serrate margin.
Now Florentinia. Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly Hystrichokolpoma, fourthly Silicisphaera, fifthly (and now) Florentinia.
This combination was not validly published in Williams and Downie, 1966, since these authors did not fully reference the basionym.
Holotype: Deflandre, 1937, pl.14 [al.pl.11], figs.3-4
Locus typicus:
Stratum typicum: Senonian
Emended diagnosis: Davey, 1969, p.159
Shell subspherical, densely granular or reticulate. Processes thin walled, granular, often striated, of three kinds: (i) 6 large precingular and 4 large postcingular, possessing wide bases and tapering distally giving rise to 2 or more tubules, typically open; (ii) a single long tubular antapical process and (iii) cingular and sulcal processes, of moderate length, slender and tubular, only joining
proximally if at all. Archaeopyle apical.
Dimensions: Holotype: length of shell 46 Ám, width 36 Ám, overall length 78 Ám,
length of processes 15-17Ám. Range of Cenomanian specimens: diameter of central body 39 (46.1) 56 Ám, maximum lcngth of processes 27 (30.2) 36 Ám. Number of specimens mcasured, 13.
Description: Davey, 1969, p.159
H. ferox appcars to be a fairly variable species. In some specimens the tabulation is not clearly indicated by the processes which tend to be smaller and may even be closed distally. However, the processes usually are well developed, their bases covering an area of the shell surface which is often slightly raised and of the same shape as a thecal plate. The precingular and postcingular processes are largest and give rise distally to as many as 10 tubules. Each cingular process divides proximally into 2 or 3 long slender tubules aligned along the cingulum. The sulcal processes may proximally divide into two tubules or may consist of a single tubule which is sometimes reduced and closed distally. The antapical process is long, tubular, open distaly and terminates with a smooth or serrate margin.