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Pareodinia ceratophora var. ceratophora
Pareodinia ceratophora "var. ceratophora". Autonym. Emendation: Below, 1990, p.66–67, as Pareodinia ceratophora var. ceratophora. Holotype: Deflandre, 1947d, text-fig.1. Now redundant. Taxonomic junior synonyms: Pareodinia ceratophora subsp. pachycera (as Pareodinia ceratophora var. pachycera) and Netrelytron parum, both according to Below (1990, p.65) — however, Netrelytron parum is now considered a taxonomic junior synonym of Netrelytron (as and now) Kalyptea stegastum.
Original description: Deflandre, 1947, p. 4
Diagnosis of the genus valid for the species: Microfossil with an apparently cellulosic membrane, deprived of any trace of furrows and tabulation, general form ellipsoidal or oval, drawn out at one of the poles into a strong horn; transverse section circular.
Membrane brownish, apparently smooth in the well-preserved specimens, sometimes more or less granular.
Dimensions: Total length 65-78 µm, width about 35-38 µm.
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Emended diagnosis: Gocht, 1970, p. 154-156
Body elongate, apically streched into a single horn. Membrane smooth or weakly granulate. Girdle located beyond the middle, shallow, often entirely absent. Sometimes remainders of the precingular and postcingular plates. Antapex convex or flattened, exceptionally with antapical tip.
Archaeopyle large, intercalary, two-plated. Outer mantle ("kalyptra") consisting of fluffy organic substance.
Dimensions (without kalyptra): Lenght 61-87 µm, width 31-42 µm (ca. 40 specimens).
Emended description: Below, 1990, p. 66-67: Pareodinia ceratophora emend. var. ceratophora
Vesicle-/plate arrangement of the dinoflagellate amphiesma cop, pop, cap, 3", 2a, 6"", 7c, 6""", 2"""", as, FM, ls, rs, ps; 1" exsert, quadragonal 1a and hexagonal 2a. Growth of thecal plates ?gonyaulacoidal.
Zygote cyst proximate, acavate, cornucavate, elongate tear-shaped to ellipsoidal, streched into the long, slender, only slightly offset apical horn, antapex lobate, or with a central indentation between unequally large, flat antapical bulges, or rounded; wall consisting of thin pedium and granular luxuria, surface evenly chagrinate, with or without surrounding kalyptra, nontabulate; tabulation scheme NR PR/XPR, NR", 1a(arch), 2a(arch), NR"", NRc, NR""", NR"""", NRs; IV 1a (DDL) and VI 2a (DR); anteriorly geniculate 2"" (L), anteriorly geniculate 3"" (DDL), anteriorly linear 4"" (DDR), anteriorly geniculate 5"" (R); suture 3""/4"" dorsal; archaeopyle anterior intercalary, 1a +2a; operculum solvate, opercular plates sectae, general opercular formula 1a(s) + 2a(s).
Original description: Deflandre, 1947, p. 4
Diagnosis of the genus valid for the species: Microfossil with an apparently cellulosic membrane, deprived of any trace of furrows and tabulation, general form ellipsoidal or oval, drawn out at one of the poles into a strong horn; transverse section circular.
Membrane brownish, apparently smooth in the well-preserved specimens, sometimes more or less granular.
Dimensions: Total length 65-78 µm, width about 35-38 µm.
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Emended diagnosis: Gocht, 1970, p. 154-156
Body elongate, apically streched into a single horn. Membrane smooth or weakly granulate. Girdle located beyond the middle, shallow, often entirely absent. Sometimes remainders of the precingular and postcingular plates. Antapex convex or flattened, exceptionally with antapical tip.
Archaeopyle large, intercalary, two-plated. Outer mantle ("kalyptra") consisting of fluffy organic substance.
Dimensions (without kalyptra): Lenght 61-87 µm, width 31-42 µm (ca. 40 specimens).
Emended description: Below, 1990, p. 66-67: Pareodinia ceratophora emend. var. ceratophora
Vesicle-/plate arrangement of the dinoflagellate amphiesma cop, pop, cap, 3", 2a, 6"", 7c, 6""", 2"""", as, FM, ls, rs, ps; 1" exsert, quadragonal 1a and hexagonal 2a. Growth of thecal plates ?gonyaulacoidal.
Zygote cyst proximate, acavate, cornucavate, elongate tear-shaped to ellipsoidal, streched into the long, slender, only slightly offset apical horn, antapex lobate, or with a central indentation between unequally large, flat antapical bulges, or rounded; wall consisting of thin pedium and granular luxuria, surface evenly chagrinate, with or without surrounding kalyptra, nontabulate; tabulation scheme NR PR/XPR, NR", 1a(arch), 2a(arch), NR"", NRc, NR""", NR"""", NRs; IV 1a (DDL) and VI 2a (DR); anteriorly geniculate 2"" (L), anteriorly geniculate 3"" (DDL), anteriorly linear 4"" (DDR), anteriorly geniculate 5"" (R); suture 3""/4"" dorsal; archaeopyle anterior intercalary, 1a +2a; operculum solvate, opercular plates sectae, general opercular formula 1a(s) + 2a(s).