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Xenicodinium rugulatum
Xenicodinium rugulatum Hansen, 1977, p.12
Now Tectatodinium. Originally Xenicodinium, subsequently (and now) Tectatodinium.
Taxonomic senior synonym: Tectatodinium pellitum, questionably according to Head (1994a, p.308), and according to Head and Nøhr-Hansen (1999, p.577).
Holotype: Hansen, 1977, figs. 20H,J
Locus typicus: Tuba 13 well, Copenhagen, Denmark
Stratum typicum: Danian
Age: Danian.
Original description: Hansen, 1977:
Diagnosis:
Xenicodinium Klement, 1960 with a thick wall and possessing a strongly rugulate surface.
Description:
Egg-shaped, thick-walled cysts (4-5 µm). Wall composed of two layers, endophragm and periphragm. Endophragm smooth c. 0.5 µm thick, periphragm 4-5 µm thick seemingly built up by numerous less than 0.5 µm granules giving rise to a spongious structure. Archaeopyle angular with (3-) 5 sides, probably precingular, situated below the less rounded pole of the cysts.
Now Tectatodinium. Originally Xenicodinium, subsequently (and now) Tectatodinium.
Taxonomic senior synonym: Tectatodinium pellitum, questionably according to Head (1994a, p.308), and according to Head and Nøhr-Hansen (1999, p.577).
Holotype: Hansen, 1977, figs. 20H,J
Locus typicus: Tuba 13 well, Copenhagen, Denmark
Stratum typicum: Danian
Age: Danian.
Original description: Hansen, 1977:
Diagnosis:
Xenicodinium Klement, 1960 with a thick wall and possessing a strongly rugulate surface.
Description:
Egg-shaped, thick-walled cysts (4-5 µm). Wall composed of two layers, endophragm and periphragm. Endophragm smooth c. 0.5 µm thick, periphragm 4-5 µm thick seemingly built up by numerous less than 0.5 µm granules giving rise to a spongious structure. Archaeopyle angular with (3-) 5 sides, probably precingular, situated below the less rounded pole of the cysts.