Phanerodinium follis Below, 1987

Now Fibradinium?. Originally Phanerodinium, subsequently (and now) Fibradinium?.
Questionable assignment: Lentin and Williams (1989, p.135).

Holotype: Below, 1987, pl.9, figs.1-5; Fensome et al., p.1197, figs.1-5
Locus typicus: Hartmannshof, Franconia, Germany
Stratum typicum: Callovian
Translation Below, 1987: Fensome et al., 1993

Original description: Below, 1987, p.47
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 µm, breadth 29 µm, thickness 29 µm.