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Tabulodinium
From Williams et al., 2017:
[Tabulodinium, Dodekova, 1990, p. 23-24; Emendation: Riding and Helby, 2001d, p. 89.
Type species: Tabulodinium senarium, Dodekova, 1990 ( pl.4, figs.4–5)]
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Original description: [Dodekova, 1990]:
Diagnosis:
At the present stage of knowledge the generic diagnosis coincides with that of the type species. It can be elaborated and made more precise after new data or new species having similar morphology are found. The cyst is proximate, pareodinioid, ovoidal with intermediately long apical horn, with or without embrio of antapical projection.
The tabulation is indicated by pandasutural bands and the plates are occupied by sculptural elements of low relief. Tabulation formula: ?pr, ?4`, 3-?a, 6", 6c, 6```, 1p, 1````, 0-6s.
Archeopyle: intercalary, type I or 3I. Cyst`s size-intermediate. "Kalyptra" is commonly present, but may be lacking some times. It is put in quotes here for it resembles ectophragm. Apicular structure on the apical horn i s rarely observed, usually lacking.
Affinities:
The genus Tabulodinium may be compared in its general shape, ornamentation, dimensions, presence of "kalyptra" and apicular structure on the apical horn only with the genus Paredodinia, but it differs from that genus in its distinctly formed pandasutural bands. The genus Pareodinia, though rarely, may be having sutural ribs, but is lacking zones devoid of ornamentation.
The tabulation formula of the genus Tabulodinium is not completely clarified yet. The pandasutural bands around the apex are not well marked. That makes the specification of the apical tabulation difficult.
[Tabulodinium, Dodekova, 1990, p. 23-24; Emendation: Riding and Helby, 2001d, p. 89.
Type species: Tabulodinium senarium, Dodekova, 1990 ( pl.4, figs.4–5)]
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Dodekova, 1990]:
Diagnosis:
At the present stage of knowledge the generic diagnosis coincides with that of the type species. It can be elaborated and made more precise after new data or new species having similar morphology are found. The cyst is proximate, pareodinioid, ovoidal with intermediately long apical horn, with or without embrio of antapical projection.
The tabulation is indicated by pandasutural bands and the plates are occupied by sculptural elements of low relief. Tabulation formula: ?pr, ?4`, 3-?a, 6", 6c, 6```, 1p, 1````, 0-6s.
Archeopyle: intercalary, type I or 3I. Cyst`s size-intermediate. "Kalyptra" is commonly present, but may be lacking some times. It is put in quotes here for it resembles ectophragm. Apicular structure on the apical horn i s rarely observed, usually lacking.
Affinities:
The genus Tabulodinium may be compared in its general shape, ornamentation, dimensions, presence of "kalyptra" and apicular structure on the apical horn only with the genus Paredodinia, but it differs from that genus in its distinctly formed pandasutural bands. The genus Pareodinia, though rarely, may be having sutural ribs, but is lacking zones devoid of ornamentation.
The tabulation formula of the genus Tabulodinium is not completely clarified yet. The pandasutural bands around the apex are not well marked. That makes the specification of the apical tabulation difficult.