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Phanerodinium consaeptum
Phanerodinium consaeptum Below, 1987
Now Microdinium. Originally Phanerodinium, subsequently (and now) Microdinium.
Holotype: Below, 1987, pl.14, figs.2-5; Fensome et al., 1993, p.1075, figs.1-2
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
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 of holotype: length 44 µm, breadth 40 µm, thickness 35 µm.
Now Microdinium. Originally Phanerodinium, subsequently (and now) Microdinium.
Holotype: Below, 1987, pl.14, figs.2-5; Fensome et al., 1993, p.1075, figs.1-2
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
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 of holotype: length 44 µm, breadth 40 µm, thickness 35 µm.