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Fibradinium diatretiforme
Fibradinium? diatretiforme (Below, 1987) Lentin and Williams, 1989
Originally Phanerodinium, subsequently (and now) Fibradinium?.
At the time of the transfer, Lentin and Williams, 1989, questionably included this species in Fibradinium.
Holotype: Below, 1987, pl.12, figs.2,7; Fensome et al., 1993, p.1123
Locus typicus: Uefte clay pit near Schermbeck, Munsterland, Germany; 6.95 m below break in slope
Stratum typicum: Oligocene (Rupelian)
Translation Below, 1987: Fensome et al., 1993
Original description: Below, 1987b, p.46-47: Phanerodinium diatretiforme
Arrangement of vesicles/plates on the dinoflagellate amphiesma cop, pop, cap, 4’, 4a, 7’, 7c, 6’’’, 2’’’’, as, FM subdivided into several periflagellar platelets, ls, rs, ps; pentagonal 1’’’’ and hexagonal 2’’’’ partiform; omegaform ps very large; adelopore on suture 1’/4’; growth of plates gonyaulacoid.
Cyst form proximate, acavate, spheroidal, hypocyst twice as long as epicyst, equatorial section circular, size small; wall composed of thin pedium and firm, spongy luxuria fused distally into a tegillum, surface a very finely meshed reticulum connecting densely arranged patches of tegillum at equal intervals, tegillum seldom recessed along the fines, generally nonareate; areation NR PR, NR’, NRa, NR’, NRc/Xc, NR’’’, NR’’’’, NRs/Xs; positions of apical, anterior intercalary, and 7 precingular areae recognizable only from the archeopyle sutures; cingulum level or shallowly indented and helicoid laevorotatory, sulcus level or slightly indented on the hypocyst, nonareate, only FM deepened; archeopyle apical/anterior intercalary, PR + 1’ + 2’ + 3’ + 4’ + 1a + 2a + 3a + 4a; operculum foederate, adnate, general opercular formula (PR + 1’ + 2’ + 3’ + 4’ + 1a + 2a + 3a + 4a)[a].
Size: Holotype: length 40 Ám, breadth 36 Ám, thickness 36 Ám.
Originally Phanerodinium, subsequently (and now) Fibradinium?.
At the time of the transfer, Lentin and Williams, 1989, questionably included this species in Fibradinium.
Holotype: Below, 1987, pl.12, figs.2,7; Fensome et al., 1993, p.1123
Locus typicus: Uefte clay pit near Schermbeck, Munsterland, Germany; 6.95 m below break in slope
Stratum typicum: Oligocene (Rupelian)
Translation Below, 1987: Fensome et al., 1993
Original description: Below, 1987b, p.46-47: Phanerodinium diatretiforme
Arrangement of vesicles/plates on the dinoflagellate amphiesma cop, pop, cap, 4’, 4a, 7’, 7c, 6’’’, 2’’’’, as, FM subdivided into several periflagellar platelets, ls, rs, ps; pentagonal 1’’’’ and hexagonal 2’’’’ partiform; omegaform ps very large; adelopore on suture 1’/4’; growth of plates gonyaulacoid.
Cyst form proximate, acavate, spheroidal, hypocyst twice as long as epicyst, equatorial section circular, size small; wall composed of thin pedium and firm, spongy luxuria fused distally into a tegillum, surface a very finely meshed reticulum connecting densely arranged patches of tegillum at equal intervals, tegillum seldom recessed along the fines, generally nonareate; areation NR PR, NR’, NRa, NR’, NRc/Xc, NR’’’, NR’’’’, NRs/Xs; positions of apical, anterior intercalary, and 7 precingular areae recognizable only from the archeopyle sutures; cingulum level or shallowly indented and helicoid laevorotatory, sulcus level or slightly indented on the hypocyst, nonareate, only FM deepened; archeopyle apical/anterior intercalary, PR + 1’ + 2’ + 3’ + 4’ + 1a + 2a + 3a + 4a; operculum foederate, adnate, general opercular formula (PR + 1’ + 2’ + 3’ + 4’ + 1a + 2a + 3a + 4a)[a].
Size: Holotype: length 40 Ám, breadth 36 Ám, thickness 36 Ám.