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Microdinium consaeptum
From Fensome et al., 2019:
Microdinium consaeptum (Below, 1987b, p.43–44, pl.14, figs.1–5,7–12) Lentin and Williams, 1989, p.243. Holotype: Below, 1987b, pl.14, figs.2–5; Fensome et al., 1993a, figs.1–2 — p.1075; figs.2–5 — p.1079. Originally Phanerodinium, subsequently (and now) Microdinium. Age: middle Albian.
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Locus typicus: Old "Morgenstern" iron ore open pit mine, Hahndorf, Germany
Stratum typicum: Middle Albian
Translation Below, 1987: Fensome et al., 1993
Original description: Below, 1987, p.43: Phanerodinium consaeptum
Arrangement of vesicles/plates on the dinoflagellate amphiesma cop, pop, cap, 4', 4a, 7", 7c, 6''', 2'''', as, FM subdivided into several periflagellar areae, ls, rs, ps; pentagonal 1'''' and hexagonal 2'''' partiform; omegaform ps very large; adelopore on suture 1"/4". Cyst form proximochorate, acavate, spheroidal, hypocyst twice as long as epicyst, equatorial section circular, maximum diameter at the posterior cingular margin; size small; wall composed of thin pedium and luxuriate ornament, surface scabrate to shagreenate with a few intraareate granules or baculi which are distally evexate or bear annuli reflecting trichocyst pores, finate ornaments like a fence of tall, thick baculi standing close together and connected just below their distal end; areation formula NR PR/X PR, NR'/X', NRa/Xa, 7", 6''', 2'''', rs, ls, ps; areation absent or rudimentary on apical and anterior intercalary regions; 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' characteristically dorsal, anteriorly geniculate V-nE 5' (R), anteriorly geniculate V-nE 6' (VR), small anteriorly geniculate V-nE 7' (VVR); cingulum very slightly helicoid laevorotatory, level, heptapartite, lati 1c to 6c, isofastigiate 7c; 6 postcingulars, posteriorly linear V-nE 1''' (VVL), posteriorly linear V-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'''' descending towards VL, VI 2'''' towards R; sulcus level, partite, small VI as, small oval FM not, or rudimentarily, subdivided into very small areae, small V ls, small V rs, 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 44 µm, breadth 40 µm, thickness 35 µm.
Microdinium consaeptum (Below, 1987b, p.43–44, pl.14, figs.1–5,7–12) Lentin and Williams, 1989, p.243. Holotype: Below, 1987b, pl.14, figs.2–5; Fensome et al., 1993a, figs.1–2 — p.1075; figs.2–5 — p.1079. Originally Phanerodinium, subsequently (and now) Microdinium. Age: middle Albian.
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Locus typicus: Old "Morgenstern" iron ore open pit mine, Hahndorf, Germany
Stratum typicum: Middle Albian
Translation Below, 1987: Fensome et al., 1993
Original description: Below, 1987, p.43: Phanerodinium consaeptum
Arrangement of vesicles/plates on the dinoflagellate amphiesma cop, pop, cap, 4', 4a, 7", 7c, 6''', 2'''', as, FM subdivided into several periflagellar areae, ls, rs, ps; pentagonal 1'''' and hexagonal 2'''' partiform; omegaform ps very large; adelopore on suture 1"/4". Cyst form proximochorate, acavate, spheroidal, hypocyst twice as long as epicyst, equatorial section circular, maximum diameter at the posterior cingular margin; size small; wall composed of thin pedium and luxuriate ornament, surface scabrate to shagreenate with a few intraareate granules or baculi which are distally evexate or bear annuli reflecting trichocyst pores, finate ornaments like a fence of tall, thick baculi standing close together and connected just below their distal end; areation formula NR PR/X PR, NR'/X', NRa/Xa, 7", 6''', 2'''', rs, ls, ps; areation absent or rudimentary on apical and anterior intercalary regions; 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' characteristically dorsal, anteriorly geniculate V-nE 5' (R), anteriorly geniculate V-nE 6' (VR), small anteriorly geniculate V-nE 7' (VVR); cingulum very slightly helicoid laevorotatory, level, heptapartite, lati 1c to 6c, isofastigiate 7c; 6 postcingulars, posteriorly linear V-nE 1''' (VVL), posteriorly linear V-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'''' descending towards VL, VI 2'''' towards R; sulcus level, partite, small VI as, small oval FM not, or rudimentarily, subdivided into very small areae, small V ls, small V rs, 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 44 µm, breadth 40 µm, thickness 35 µm.