Back
Phanerodinium senticetum
Phanerodinium senticetum Below, 1987
Now Eisenackia?. Originally Phanerodinium, subsequently (and now) Eisenackia?.
Holotype: Below, 1987, pl.9, figs.11-15; Fensome et al., 1993, p.1329, figs.1-4
Locus typicus: Old "Morgenstern" iron ore open pit mine, Hahndorf, Germany
Stratum typicum: Late Albian
Translation Below, 1987: Fensome et al., 1993
Original description: Below, 1987, p.52
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; growth of plates gonyaulacoid.
Cyst form proximate to proximochorate, acavate, ovaloidal, epicyst somewhat shorter than hypocyst, maximum diameter at the posterior cingular margin, equatorial section circular; size small; wall composed of thin pedium and low, peniareate and intraareate, luxuriate ornament in the form of tangled, anastomosing, reinforced fibres, fibres distally coarsely thickened or finely cloven, and in peniareate positions largely fused into irregularly lacerated septa, areate, fines without luxuria; areation formula XPR, X", Xa, 7", 7c, 6""", 2"""", Xs/as, FM, ls, rs, ps; preapical, apical and anterior intercalary plates reflected only schematically; 7 precingulars, anteriorly geniculate V-nE 1" (VVL), anteriorly geniculate V-nE 2" (L), anteriorly geniculate V-nE 3" (DDL), anteriorly geniculate V-nE 4" (DDR), finis 3"/4" dorsal, anteriorly geniculate V-nE 5" (R), anteriorly geniculate VnE 6"" (VR), small anteriorly geniculate V-nE 7" (WR); cingulum helicoid laevorotatory, level, heptapartite, lati lc to 6c, isofastigiate 7c; 6 postcingulars, posteriorly linear V-nE 1""" (VVL), posteriorly linear IV-nE 2""" (VL), posteriorly geniculate V-nE 3""" (DL), posteriorly linear IV-nE 4""" (DDR), posteriorly linear IV-nE 5""" (R), posteriorly linear V-nE 6""" (VR); 2 antapicals partiform, V 1"""" (VL), VI 2"""" (R); sulcus level, partite, small VI as, central sulcus nonareate, large omegaform VI ps; 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 36 µm, breadth 28 µm, thickness 28 µm.
Now Eisenackia?. Originally Phanerodinium, subsequently (and now) Eisenackia?.
Holotype: Below, 1987, pl.9, figs.11-15; Fensome et al., 1993, p.1329, figs.1-4
Locus typicus: Old "Morgenstern" iron ore open pit mine, Hahndorf, Germany
Stratum typicum: Late Albian
Translation Below, 1987: Fensome et al., 1993
Original description: Below, 1987, p.52
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; growth of plates gonyaulacoid.
Cyst form proximate to proximochorate, acavate, ovaloidal, epicyst somewhat shorter than hypocyst, maximum diameter at the posterior cingular margin, equatorial section circular; size small; wall composed of thin pedium and low, peniareate and intraareate, luxuriate ornament in the form of tangled, anastomosing, reinforced fibres, fibres distally coarsely thickened or finely cloven, and in peniareate positions largely fused into irregularly lacerated septa, areate, fines without luxuria; areation formula XPR, X", Xa, 7", 7c, 6""", 2"""", Xs/as, FM, ls, rs, ps; preapical, apical and anterior intercalary plates reflected only schematically; 7 precingulars, anteriorly geniculate V-nE 1" (VVL), anteriorly geniculate V-nE 2" (L), anteriorly geniculate V-nE 3" (DDL), anteriorly geniculate V-nE 4" (DDR), finis 3"/4" dorsal, anteriorly geniculate V-nE 5" (R), anteriorly geniculate VnE 6"" (VR), small anteriorly geniculate V-nE 7" (WR); cingulum helicoid laevorotatory, level, heptapartite, lati lc to 6c, isofastigiate 7c; 6 postcingulars, posteriorly linear V-nE 1""" (VVL), posteriorly linear IV-nE 2""" (VL), posteriorly geniculate V-nE 3""" (DL), posteriorly linear IV-nE 4""" (DDR), posteriorly linear IV-nE 5""" (R), posteriorly linear V-nE 6""" (VR); 2 antapicals partiform, V 1"""" (VL), VI 2"""" (R); sulcus level, partite, small VI as, central sulcus nonareate, large omegaform VI ps; 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 36 µm, breadth 28 µm, thickness 28 µm.