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Diconodinium pelliferum
From Fensome et al., 2019:
Diconodinium pelliferum (Cookson and Eisenack, 1958, p.38, pl.10, fig.11) Eisenack and Cookson, 1960, p.3. Emendation:
Morgan, 1977, p.128, as Diconodinium pelliferum. Holotype: Cookson and Eisenack, 1958, pl.10, fig.11; Morgan,
1977, pl.1, figs.7a–b. Originally Palaeohystrichophora, subsequently (and now) Diconodinium. Age: Albian.
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Original description: Cookson and Eisenack, 1958, p. 39: Palaeohystrichophora pellifera
The theca is broadly fusiform and divided unequally by the transverse girdle; the "epitheca" is terminated by a shortly bifid process, the "hypotheca" by a short pointed process. The surface is densely covered with spines c.1-2.5 µm long.
Dimensions: Type 85x59 µm; the "Tertiary" specimen 122x56 µm.
Emended description: Morgan, 1977, p.128
Ambitus rhomboidal to fusiform, prolonged into a truncate apical horn and a single sharply pointed antapical horn close to the midline. Epicyst larger than hypocyst. Apparent autophragm mostly thin, but may thicken to form a partly solid apical horn and a wholly or partly solid antapical horn. Surface covered with dense, weakly capitate spines 1.0-2.5 µm long, nontabular. Spines of uniform length over most of cyst, slightly shorter near apical horn. Only indication of paratabulation at the paracingulum, delineated by two slightly raised ridges bearing aligned spines, individual paraplates not visible. Archeopyle not observed, presumed la or IPa as for other species of the genus.
Dimensions: 85-122 µm long and 56-59 µm broad.
Affinities:
Morgan, 1977, p. 128: Dense surface ornamentation of 1.0-2.5 µm long, weakly capitate spines is characteristic of D. pelliferum.
Diconodinium pelliferum (Cookson and Eisenack, 1958, p.38, pl.10, fig.11) Eisenack and Cookson, 1960, p.3. Emendation:
Morgan, 1977, p.128, as Diconodinium pelliferum. Holotype: Cookson and Eisenack, 1958, pl.10, fig.11; Morgan,
1977, pl.1, figs.7a–b. Originally Palaeohystrichophora, subsequently (and now) Diconodinium. Age: Albian.
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Original description: Cookson and Eisenack, 1958, p. 39: Palaeohystrichophora pellifera
The theca is broadly fusiform and divided unequally by the transverse girdle; the "epitheca" is terminated by a shortly bifid process, the "hypotheca" by a short pointed process. The surface is densely covered with spines c.1-2.5 µm long.
Dimensions: Type 85x59 µm; the "Tertiary" specimen 122x56 µm.
Emended description: Morgan, 1977, p.128
Ambitus rhomboidal to fusiform, prolonged into a truncate apical horn and a single sharply pointed antapical horn close to the midline. Epicyst larger than hypocyst. Apparent autophragm mostly thin, but may thicken to form a partly solid apical horn and a wholly or partly solid antapical horn. Surface covered with dense, weakly capitate spines 1.0-2.5 µm long, nontabular. Spines of uniform length over most of cyst, slightly shorter near apical horn. Only indication of paratabulation at the paracingulum, delineated by two slightly raised ridges bearing aligned spines, individual paraplates not visible. Archeopyle not observed, presumed la or IPa as for other species of the genus.
Dimensions: 85-122 µm long and 56-59 µm broad.
Affinities:
Morgan, 1977, p. 128: Dense surface ornamentation of 1.0-2.5 µm long, weakly capitate spines is characteristic of D. pelliferum.