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Fibradinium follis
Fibradinium follis (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, 1987b, pl.9, figs.1-5; Fensome et al., p.1197, figs.1-5
Locus typicus: Hartmannshof, Franconia, Germany
Stratum typicum: Jason/Coronatum Zone, Callovian
Translation Below, 1987: Fensome et al., 1993
Original description: Below, 1987, p.47: Phanerodinium follis
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, epicyst somewhat smaller than hypocyst, without polar protuberances, maximum diameter on the anterior portion of the postcingulars; size small- wall composed of thin pedium, luxuria spongy or composed of short trabecula of uniform length at irregular intervals, fused distally into a glabrous to shagreenate tegillum, free from ornament, tegillum occasionally perforated reflecting trichocyst pores and recessed along fines; areation formula XPR/cop, pop, cap, 4’, 4a, 7’, 7c, 6’’’, 2’’’’, as, FM, ls, rs, ps; PR generally undifferentiated; 4 small apicals, steno VII 1’ (V), VIII 2’ (L), VIII 3’ (R), steno V 4’ (VVR); 4 small anterior intercalaries, caroidal 1a (DL), fastigiate 2a (D), deltaform inversecamerate 3a (DR), V 4a (RVR); 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 V-nE 6’’ (VR), small anteriorly geniculate V-nE 7’ (VVR); cingulum level, weakly helicoid laevorotatory, heptapartite, lati 1c to 6c, isofastigiate 7c; 6 postcingulars, posteriorly linear V-nE 1’’’ (VVL), posteriorly linear IV-nE 2’’’ (VL), posteriorly geniculate VnE 3’’’ (DL), posteriorly linear IV-nE 4’’’ (DDR), posteriorly linear IV-nE 5’’’ (R), posteriorly linear V-nE 6’’’ (VR); 2 antapicals, V 1’’’’ descending towards VL, VI 2’’’’ towards R; sulcus lightly indented on the hypocyst, partite, small VI as, small oval FM subdivided into several very small areae, small V ls, small V rs, large omegaforrn VI ps bulging slightly into 2’’’’; 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 29 Ám, breadth 29 Ám, thickness 29 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, 1987b, pl.9, figs.1-5; Fensome et al., p.1197, figs.1-5
Locus typicus: Hartmannshof, Franconia, Germany
Stratum typicum: Jason/Coronatum Zone, Callovian
Translation Below, 1987: Fensome et al., 1993
Original description: Below, 1987, p.47: Phanerodinium follis
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, epicyst somewhat smaller than hypocyst, without polar protuberances, maximum diameter on the anterior portion of the postcingulars; size small- wall composed of thin pedium, luxuria spongy or composed of short trabecula of uniform length at irregular intervals, fused distally into a glabrous to shagreenate tegillum, free from ornament, tegillum occasionally perforated reflecting trichocyst pores and recessed along fines; areation formula XPR/cop, pop, cap, 4’, 4a, 7’, 7c, 6’’’, 2’’’’, as, FM, ls, rs, ps; PR generally undifferentiated; 4 small apicals, steno VII 1’ (V), VIII 2’ (L), VIII 3’ (R), steno V 4’ (VVR); 4 small anterior intercalaries, caroidal 1a (DL), fastigiate 2a (D), deltaform inversecamerate 3a (DR), V 4a (RVR); 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 V-nE 6’’ (VR), small anteriorly geniculate V-nE 7’ (VVR); cingulum level, weakly helicoid laevorotatory, heptapartite, lati 1c to 6c, isofastigiate 7c; 6 postcingulars, posteriorly linear V-nE 1’’’ (VVL), posteriorly linear IV-nE 2’’’ (VL), posteriorly geniculate VnE 3’’’ (DL), posteriorly linear IV-nE 4’’’ (DDR), posteriorly linear IV-nE 5’’’ (R), posteriorly linear V-nE 6’’’ (VR); 2 antapicals, V 1’’’’ descending towards VL, VI 2’’’’ towards R; sulcus lightly indented on the hypocyst, partite, small VI as, small oval FM subdivided into several very small areae, small V ls, small V rs, large omegaforrn VI ps bulging slightly into 2’’’’; 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 29 Ám, breadth 29 Ám, thickness 29 Ám.