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Dapcodinium coalitum
Dapcodinium coalitum Davies, 1983
Now Mancodinium. Originally Dapcodinium, subsequently (and now) Mancodinium.
Holotype: Davies, 1983, pl.1, figs.7-8
Locus typicus: Prince Patrick Island, District of Franklin, Northwest Territories, Canada
Stratum typicum: Toarcian-Early Bajocian
Original diagnosis: Davies, 1983, p. 14
A species of Dapcodinium with a short fibrous apical horn, rounded antapex, indistinct cingulum and a slightly invaginated sulcus. Ornament densely granulate, granules small and coalescent with rare short spines. Sutures are expressed by narrow pandasutural zones.
Tabulation: 4", 5a, 7", ?8c, 7""", 5p, 2"""", ?s.
Archeopyle: (4A51) + 7P, disintegration type.
Size: length - 45(49)57 µm; breadth - 33(45)54 µm.
Original description: Davies, 1983, p. 14
The shape is oblate with a proximate wall structure. The fibrous apical horn arises from all four apical plates and terminates raggedly (4-5 µm long). The granulate ornament is dense, so that the granules coalesce resulting in a spongy appearance. The sutures are apparent through a reduction in ornament. Up to five small processes (2µm high) may form on the epicyst. The disintegration archeopyle may be found at various stages of development from being intact to the complete loss of all apical, intercalary and precingular plates.
Affinities:
Davies, 1983, p. 14: D . priscum and D . wapellense differ from D . coalitum
in lacking ornament and in possessing only one antapical plate. D. ornatum differs in possessing only four intercalary plates and having smaller ornament.
Now Mancodinium. Originally Dapcodinium, subsequently (and now) Mancodinium.
Holotype: Davies, 1983, pl.1, figs.7-8
Locus typicus: Prince Patrick Island, District of Franklin, Northwest Territories, Canada
Stratum typicum: Toarcian-Early Bajocian
Original diagnosis: Davies, 1983, p. 14
A species of Dapcodinium with a short fibrous apical horn, rounded antapex, indistinct cingulum and a slightly invaginated sulcus. Ornament densely granulate, granules small and coalescent with rare short spines. Sutures are expressed by narrow pandasutural zones.
Tabulation: 4", 5a, 7", ?8c, 7""", 5p, 2"""", ?s.
Archeopyle: (4A51) + 7P, disintegration type.
Size: length - 45(49)57 µm; breadth - 33(45)54 µm.
Original description: Davies, 1983, p. 14
The shape is oblate with a proximate wall structure. The fibrous apical horn arises from all four apical plates and terminates raggedly (4-5 µm long). The granulate ornament is dense, so that the granules coalesce resulting in a spongy appearance. The sutures are apparent through a reduction in ornament. Up to five small processes (2µm high) may form on the epicyst. The disintegration archeopyle may be found at various stages of development from being intact to the complete loss of all apical, intercalary and precingular plates.
Affinities:
Davies, 1983, p. 14: D . priscum and D . wapellense differ from D . coalitum
in lacking ornament and in possessing only one antapical plate. D. ornatum differs in possessing only four intercalary plates and having smaller ornament.