Back
Maduradinium turpe
Maduradinium turpe Norris, 1986
Holotype: Norris, 1986, pl.13, fig.7
Locus typicus: Imperial Nuktak C-22 well, Mackenzie District, Canada
Stratum typicum: Eocene
Original diagnosis: Norris, 1986, p. 44
Cysts proximate with a short apical and two antapical horns. Autophragm with dense nontabular foveae on the inner surface passing into fossulae in the cardinal positions and along the cingulum. Archeopyle 1. Logogram: Pa; ap 2aa; 1; non; per.
Original description: Norris, 1986, p. 44
Apical horn 2-3 µm long; antapical horns up to 6 µm long but the left horn strongly reduced. Autophragm 0.5 µm thick except on the apical horn where it is 1 µm thick. Inner surface of autophragm with randomly distributed foveae up to 0.25 µm in diameter and spaced 0.25-1 µm apart. Outer surface of autophragm with very sparsely distributed tiny granules. Internal foveae larger and coalescent into fosulae beneath the horns and along the cingulum. Cingulum 4-6 µm wide, slightly raised and flanked by 1 µm high ridges. Archeopyle intercalary, probably standard hexa 2a, but otherwise no indication of tabulation.
Dimensions. Total length 43-65 µm; width 41-58 µm. Holotype. 65 µm long; 58 µm.
Affinities:
Norris, 1986, p. 45: Maduradinium turpe is distinguished from Muradinium spatiosum (Morgenroth) Lentin and Williams by the internally foveolate autophragm and generally smaller dimensions.
Holotype: Norris, 1986, pl.13, fig.7
Locus typicus: Imperial Nuktak C-22 well, Mackenzie District, Canada
Stratum typicum: Eocene
Original diagnosis: Norris, 1986, p. 44
Cysts proximate with a short apical and two antapical horns. Autophragm with dense nontabular foveae on the inner surface passing into fossulae in the cardinal positions and along the cingulum. Archeopyle 1. Logogram: Pa; ap 2aa; 1; non; per.
Original description: Norris, 1986, p. 44
Apical horn 2-3 µm long; antapical horns up to 6 µm long but the left horn strongly reduced. Autophragm 0.5 µm thick except on the apical horn where it is 1 µm thick. Inner surface of autophragm with randomly distributed foveae up to 0.25 µm in diameter and spaced 0.25-1 µm apart. Outer surface of autophragm with very sparsely distributed tiny granules. Internal foveae larger and coalescent into fosulae beneath the horns and along the cingulum. Cingulum 4-6 µm wide, slightly raised and flanked by 1 µm high ridges. Archeopyle intercalary, probably standard hexa 2a, but otherwise no indication of tabulation.
Dimensions. Total length 43-65 µm; width 41-58 µm. Holotype. 65 µm long; 58 µm.
Affinities:
Norris, 1986, p. 45: Maduradinium turpe is distinguished from Muradinium spatiosum (Morgenroth) Lentin and Williams by the internally foveolate autophragm and generally smaller dimensions.