Back
Pterodinium reticulatum
Pterodinium? reticulatum Singh, 1971
Originally Pterodinium, subsequently (and now) Pterodinium?. Stover and
Evitt, 1978 considered this to be a "provisionally accepted species" of Pterodinium.
Holotype: Singh, 1971, pl.60, fig.6-7; Jan du Chêne et al., 1986, pl.90, figs.4-5
Locus typicus: Peace River area, Canada
Stratum typicum: Middle Albian
Original description: Singh, 1971, p. 358
Test dorsoventrally oriented; body oval, tabulate, with wing-like, up to 16 µm high sutural crests; crests membraneous, coarsely serrate, with 3-to 4 µm high spines at the points of junction; tabulation not clear; a large antapical plate (1"""") clearly outlined; cingulum laevo-rotatory, bordered by low crests; sulcus present on ventral hypotract and epitract; archeopyle precingular, quadrangular in outline, and formed by the loss of plate 3""; body finely reticulate with thin muri and 0.5 to 1.5 µm wide lumina; body wall about 1 µm thick.
Size range: Total length of the test, including the crests (4 specimens) 92(100)105 µm. Holotype 105 µm. Total breadth of the test, including the crests (4 specimens) 70(78)88 µm. Holotype 88 µm. Length of the body (4 specimens) 70(73)76 µm. Holotype 76 µm. Breadth of the body (4 specimens) 63(67)70 µm. Holotype 70 µm.
Affinities:
Singh, 1971, p. 358-359: Pterodinium reticulatum can be easily distinguished from Pterodinium magnoserratum Cookson and Eisenack, 1962, which has a smooth body and bifurcate projections at the points of junction of the crests.
Originally Pterodinium, subsequently (and now) Pterodinium?. Stover and
Evitt, 1978 considered this to be a "provisionally accepted species" of Pterodinium.
Holotype: Singh, 1971, pl.60, fig.6-7; Jan du Chêne et al., 1986, pl.90, figs.4-5
Locus typicus: Peace River area, Canada
Stratum typicum: Middle Albian
Original description: Singh, 1971, p. 358
Test dorsoventrally oriented; body oval, tabulate, with wing-like, up to 16 µm high sutural crests; crests membraneous, coarsely serrate, with 3-to 4 µm high spines at the points of junction; tabulation not clear; a large antapical plate (1"""") clearly outlined; cingulum laevo-rotatory, bordered by low crests; sulcus present on ventral hypotract and epitract; archeopyle precingular, quadrangular in outline, and formed by the loss of plate 3""; body finely reticulate with thin muri and 0.5 to 1.5 µm wide lumina; body wall about 1 µm thick.
Size range: Total length of the test, including the crests (4 specimens) 92(100)105 µm. Holotype 105 µm. Total breadth of the test, including the crests (4 specimens) 70(78)88 µm. Holotype 88 µm. Length of the body (4 specimens) 70(73)76 µm. Holotype 76 µm. Breadth of the body (4 specimens) 63(67)70 µm. Holotype 70 µm.
Affinities:
Singh, 1971, p. 358-359: Pterodinium reticulatum can be easily distinguished from Pterodinium magnoserratum Cookson and Eisenack, 1962, which has a smooth body and bifurcate projections at the points of junction of the crests.