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Phanerodinium carinatum
Phanerodinium carinatum Below, 1987
Now Microdinium. Originally Phanerodinium, subsequently (and now) Microdinium. In this index, we do not follow Marheinecke, 1992 who retained this species in Phanerodinium.
Holotype: Below, 1987, pl.10, figs.1-5
Locus typicus: Pit IV, Misburg, Germany
Stratum typicum: Late Campanian
Translation Below, 1987: Fensome et al., 1993
Original Description: Below, 1987, p.41
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-finicavate, spheroidal, slightly ovaloidal, hypocyst twice as long as epicyst, equatorial section circular, maximum diameter at the posterior cingular margin; size small; wall composed of thin pedium and rigid luxuria fused distally to form a tegillum, surface glabrous to shagreenate; numerous pits or perforations diffusely intraareate or aligned congruently to the area margin reflect trichocyst pores; tegillum rising from a broad, finate base to form hollow distal carinae, tapering to smooth, sharp edges; the carinae, symmetrical or leaning in one direction, directly imitate the overlapping of thecal plates; areation formula XPR/COP, pop, cap, X"/4", Xa/4a, 7", 7c, 6""", 2"""", as, FM, ls, rs, ps; PR, apicals, and anterior intercalaries reflected only rudimentarily, or cop very small, circular, surrounded by an annular pop, small planate cap (V); 4 small apicals, steno VII 1" (V), VIII 2" (L),VIII 3" (R), steno V 4" (VVR), porichnion on finis 4"/1"; 4 small anterior intercalaries, small caroidal 1a (DL), fastigiate 2a (D), deltaform inverse-camerate 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" characteristically somewhat dorsal, anteriorly geniculate V-nE 5" (R), anteriorly geniculate V-nE 6" (VR), small anteriorly geniculate V-nE 7" (VVR); cingulum planispiral or very weakly helicoid laevorotatory, level or only slightly indented, heptapartite, lati 1c 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"""" descending towards VL, VI 2"""" towards R; sulcus slightly indented on the hypocyst, partite, small VI as, small oval FM subdivided into several 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 36 µm, breadth 33 µm, thickness 33 µm.
Now Microdinium. Originally Phanerodinium, subsequently (and now) Microdinium. In this index, we do not follow Marheinecke, 1992 who retained this species in Phanerodinium.
Holotype: Below, 1987, pl.10, figs.1-5
Locus typicus: Pit IV, Misburg, Germany
Stratum typicum: Late Campanian
Translation Below, 1987: Fensome et al., 1993
Original Description: Below, 1987, p.41
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-finicavate, spheroidal, slightly ovaloidal, hypocyst twice as long as epicyst, equatorial section circular, maximum diameter at the posterior cingular margin; size small; wall composed of thin pedium and rigid luxuria fused distally to form a tegillum, surface glabrous to shagreenate; numerous pits or perforations diffusely intraareate or aligned congruently to the area margin reflect trichocyst pores; tegillum rising from a broad, finate base to form hollow distal carinae, tapering to smooth, sharp edges; the carinae, symmetrical or leaning in one direction, directly imitate the overlapping of thecal plates; areation formula XPR/COP, pop, cap, X"/4", Xa/4a, 7", 7c, 6""", 2"""", as, FM, ls, rs, ps; PR, apicals, and anterior intercalaries reflected only rudimentarily, or cop very small, circular, surrounded by an annular pop, small planate cap (V); 4 small apicals, steno VII 1" (V), VIII 2" (L),VIII 3" (R), steno V 4" (VVR), porichnion on finis 4"/1"; 4 small anterior intercalaries, small caroidal 1a (DL), fastigiate 2a (D), deltaform inverse-camerate 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" characteristically somewhat dorsal, anteriorly geniculate V-nE 5" (R), anteriorly geniculate V-nE 6" (VR), small anteriorly geniculate V-nE 7" (VVR); cingulum planispiral or very weakly helicoid laevorotatory, level or only slightly indented, heptapartite, lati 1c 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"""" descending towards VL, VI 2"""" towards R; sulcus slightly indented on the hypocyst, partite, small VI as, small oval FM subdivided into several 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 36 µm, breadth 33 µm, thickness 33 µm.