Back
Fibradinium diatretiforme
From Fensome et al., 2019:
Fibradinium? diatretiforme (Below, 1987b, p.46–47, pl.12, figs.2,7) Lentin and Williams, 1989, p.135. Holotype: Below, 1987b, pl.12, figs.2,7; Fensome et al., 1993a, figs.1–2 — p.1123. Originally Phanerodinium, subsequently (and now) Fibradinium?. Questionable assignment: Lentin and Williams (1989, p.135). Age: Oligocene.
---------------------------------------------------------------------------------------------------
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 µm, breadth 36 µm, thickness 36 µm.
Fibradinium? diatretiforme (Below, 1987b, p.46–47, pl.12, figs.2,7) Lentin and Williams, 1989, p.135. Holotype: Below, 1987b, pl.12, figs.2,7; Fensome et al., 1993a, figs.1–2 — p.1123. Originally Phanerodinium, subsequently (and now) Fibradinium?. Questionable assignment: Lentin and Williams (1989, p.135). Age: Oligocene.
---------------------------------------------------------------------------------------------------
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 µm, breadth 36 µm, thickness 36 µm.