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Taleisphaera hydra
Taleisphaera hydra Duxbury, 1979a, p.201, pl.2, figs.1,4,6–7. Emendation: Harding, 1986a, p.97–98,100, as Taleisphaera hydra.
Originally (and now) Taleisphaera, subsequently Kiokansium. Below, 1982 transferred this species to Kiokansium Stover and Evitt, 1978; however, Lentin and Williams, 1985 retained it in Taleisphaera.
Holotype: Duxbury, 1979, pl.2, figs.1,4; Fensome et al., 1993, p.1233, figs.1-2
Locus typicus: Speeton, England; Division MB, Speeton Clay
Stratum typicum: Middle Barremian
Original diagnosis: Duxbury, 1979, p.201
A species having a finely perforate body wall and a subpolygonal, ellipsoidal or ovoidal body shape. The main body length to breadth ratio is always greater than 1. Numerous processes are present and these may be 1/4 to 1/3 the body length. Processes are aligned along low, penitabular crests, so that each plate boundary is suggested by a double crest. Gonal processes predominate but crestal ones are not uncommon. Individual processes are proximally flared and distally flared and furcate, sometimes multifurcate, so that numerous hairlike terminal filaments may be present. Faint striations are commonly present running along each process. The archeopyle is formed by detachment of two precingular plates.
Emended diagnosis: Harding, 1986, p.97-98
Shape: ellipsoidal to sub-spherical and sub-polygonal. Phragma: autophragm, 0-3 µm thick. Sculpture of coarse granulae. Low "porous" penitabular septa formed by coalescing of granulae, may fuse and become prolonged into (mainly gonal) short processes. Distally, processes are solid and secate, larger ones occasionally furcate. Paratabulation: gonyaulacacean tabulation indicated by penitabular septa on dorsal and ventral surfaces of cyst. Septa reduced in parasulcal region and tabulation indicated by solitary processes. Formula: ?4", 6", 6c""" [sic], 1"""", as, ra, rs, ls, ps. Archaeopyle: precingular, type 2P, plates 3" and 4". Operculum free. Paracingulum: indicated by fused granulae in the form of single transverse equatorial septa (with processes at either end of the septa). The septa can take the form of simulate "process complexes" delineating rectangular fields within the paraplate area. Parasulcus: indicated by low penitabular septa and isolated processes.
Size: Holotype: 62 x 60 µm. Range of 25 specimens: 60(68)78 x 48(58)70 µm.
Originally (and now) Taleisphaera, subsequently Kiokansium. Below, 1982 transferred this species to Kiokansium Stover and Evitt, 1978; however, Lentin and Williams, 1985 retained it in Taleisphaera.
Holotype: Duxbury, 1979, pl.2, figs.1,4; Fensome et al., 1993, p.1233, figs.1-2
Locus typicus: Speeton, England; Division MB, Speeton Clay
Stratum typicum: Middle Barremian
Original diagnosis: Duxbury, 1979, p.201
A species having a finely perforate body wall and a subpolygonal, ellipsoidal or ovoidal body shape. The main body length to breadth ratio is always greater than 1. Numerous processes are present and these may be 1/4 to 1/3 the body length. Processes are aligned along low, penitabular crests, so that each plate boundary is suggested by a double crest. Gonal processes predominate but crestal ones are not uncommon. Individual processes are proximally flared and distally flared and furcate, sometimes multifurcate, so that numerous hairlike terminal filaments may be present. Faint striations are commonly present running along each process. The archeopyle is formed by detachment of two precingular plates.
Emended diagnosis: Harding, 1986, p.97-98
Shape: ellipsoidal to sub-spherical and sub-polygonal. Phragma: autophragm, 0-3 µm thick. Sculpture of coarse granulae. Low "porous" penitabular septa formed by coalescing of granulae, may fuse and become prolonged into (mainly gonal) short processes. Distally, processes are solid and secate, larger ones occasionally furcate. Paratabulation: gonyaulacacean tabulation indicated by penitabular septa on dorsal and ventral surfaces of cyst. Septa reduced in parasulcal region and tabulation indicated by solitary processes. Formula: ?4", 6", 6c""" [sic], 1"""", as, ra, rs, ls, ps. Archaeopyle: precingular, type 2P, plates 3" and 4". Operculum free. Paracingulum: indicated by fused granulae in the form of single transverse equatorial septa (with processes at either end of the septa). The septa can take the form of simulate "process complexes" delineating rectangular fields within the paraplate area. Parasulcus: indicated by low penitabular septa and isolated processes.
Size: Holotype: 62 x 60 µm. Range of 25 specimens: 60(68)78 x 48(58)70 µm.