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Pyramidium
From Fensome et al., 2019:
"Pyramidium", Clarke and Verdier, 1967, p.39–40.
Name illegitimate -- nomenclatural senior synonym: Xiphophoridium, which has the same type.
Taxonomic senior synonym: Oodnadattia, according to Below (1981a, p.64) -- however, Lentin and Williams (1981, p.238,294) retained Xiphophoridium.
Type: Cookson and Eisenack, 1962b, pl.2, fig.1, as Hystrichodinium alatum.
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Original description: [Clarke and Verdier, 1967]:
Diagnosis:
Overall shape pyramidal. Tabulation present. Girdle present and displaced ventrally. Plates bordered by ledges bearing processes of which those at the junction of the septa are the longest. Wall smooth or ornamented with tubercles or verrucae.
Archaeopyle apical.
"Pyramidium", Clarke and Verdier, 1967, p.39–40.
Name illegitimate -- nomenclatural senior synonym: Xiphophoridium, which has the same type.
Taxonomic senior synonym: Oodnadattia, according to Below (1981a, p.64) -- however, Lentin and Williams (1981, p.238,294) retained Xiphophoridium.
Type: Cookson and Eisenack, 1962b, pl.2, fig.1, as Hystrichodinium alatum.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Clarke and Verdier, 1967]:
Diagnosis:
Overall shape pyramidal. Tabulation present. Girdle present and displaced ventrally. Plates bordered by ledges bearing processes of which those at the junction of the septa are the longest. Wall smooth or ornamented with tubercles or verrucae.
Archaeopyle apical.