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Muratodinium fimbriatum
Muratodinium fimbriatum (Cookson and Eisenack, 1967) Drugg, 1970
Originally Kenleyia, subsequently (and now) Muratodinium.
Holotype: Cookson and Eisenack, 1967, pl.40, fig.3
Age: Paleocene
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Muratodinium fimbriatum (Cookson and Eisenack, 1967b) Drugg, 1970b. According to Drugg (1970, p.818), Muratodinium fimbriatum has a fibrous apical horn, but the antapical horn is a projection of the endocoel in the form of a small hollow nipple. Sometimes the apex can project in the same way when it is capped by the fibrous horn. Wall about 1.5 µm thick, fibrous, dorsally it is often reticulate with short acuminate spines at the reticulum wall junctions. The septa on the parasutures are lace-like, fibrous and variable in height but about 15 µm. Antapical plate inclined towards ventral surface. Size: overall length 100-120 µm, overall width 84-112 µm.
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Muratodinium fimbriatum (Cookson and Eisenack) Stover and Evitt, 1978
KenIeyia fimbriata Cookson and Eisenack, 1967
Original description: Cookson and Eisenack, 1967, p.252: Kenleyia fimbriata
Shell broadly oval, somewhat flattened, typically with a relatively short, solid, blunt or sharply- pointed apical and antapical horn and usually an indistinctly delimited girdle. The surface is more or less clearly marked out into a few large, approximately circular areas by vertical lace-like fringes of varying widths. Usually these areas, which frequently are most clearly outlined on the dorsal surface to the right and left of the mid- line, pass over the lateral margins to the ventral surface. The archeopyle is rather large, precingular and hoof- shaped. The surface of the shell is finely and closely granular.
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Supplemental description: Drugg, 1970, p. 818-819
Tract ovoidal to broadly elliptical in outline with small apical and antapical horns, the latter usually shorter than the former. The apical horn is of a porous fibrous nature. The antapical horn is a projection of the endocoel in the form of a small hollow nipple. Sometimes the endocoel projects apically as well in which case it is capped by the fibrous horn. The body wall is about 1.5 Ám thick, endophragm smooth and relatively thin, periphragm twice as thick as endophragm and of a porous fibrous construction. Dorsally the surface is often somewhat reticulate with short acuminate spines at the reticulum wall junctures (see Fig. 14 B). This feature is best seen by using a Scanning Electron Microscope. Ventrally the surface exhibits a porous corrugate granulate appearance (see Fig. 15 B). The periphragm gives rise to vertical lace-like fringes or walls which divide the tract surface into plates. These fringes are fibrous in nature and somewhat variable in height but are usually about 15 Ám high. A cingular fringe is prominent dorsally. The tabulation (see Fig. 13 E-H) is distinct dorsally but is less so ventrally, that is plates 1', 4', 6" and 1''' are sometimes relatively indistinct. The antapical plate is inclined toward the ventral surface. The hoof-shaped operculum exhibits a lacy fringe which encircles it just interior to the border. The tract ranges in height from 70 to 113 Ám, and the width ranges from 65 to 106 Ám. Apical horn about 10 Ám antapical horn about 7 Ám.
Originally Kenleyia, subsequently (and now) Muratodinium.
Holotype: Cookson and Eisenack, 1967, pl.40, fig.3
Age: Paleocene
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Muratodinium fimbriatum (Cookson and Eisenack, 1967b) Drugg, 1970b. According to Drugg (1970, p.818), Muratodinium fimbriatum has a fibrous apical horn, but the antapical horn is a projection of the endocoel in the form of a small hollow nipple. Sometimes the apex can project in the same way when it is capped by the fibrous horn. Wall about 1.5 µm thick, fibrous, dorsally it is often reticulate with short acuminate spines at the reticulum wall junctions. The septa on the parasutures are lace-like, fibrous and variable in height but about 15 µm. Antapical plate inclined towards ventral surface. Size: overall length 100-120 µm, overall width 84-112 µm.
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Muratodinium fimbriatum (Cookson and Eisenack) Stover and Evitt, 1978
KenIeyia fimbriata Cookson and Eisenack, 1967
Original description: Cookson and Eisenack, 1967, p.252: Kenleyia fimbriata
Shell broadly oval, somewhat flattened, typically with a relatively short, solid, blunt or sharply- pointed apical and antapical horn and usually an indistinctly delimited girdle. The surface is more or less clearly marked out into a few large, approximately circular areas by vertical lace-like fringes of varying widths. Usually these areas, which frequently are most clearly outlined on the dorsal surface to the right and left of the mid- line, pass over the lateral margins to the ventral surface. The archeopyle is rather large, precingular and hoof- shaped. The surface of the shell is finely and closely granular.
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Supplemental description: Drugg, 1970, p. 818-819
Tract ovoidal to broadly elliptical in outline with small apical and antapical horns, the latter usually shorter than the former. The apical horn is of a porous fibrous nature. The antapical horn is a projection of the endocoel in the form of a small hollow nipple. Sometimes the endocoel projects apically as well in which case it is capped by the fibrous horn. The body wall is about 1.5 Ám thick, endophragm smooth and relatively thin, periphragm twice as thick as endophragm and of a porous fibrous construction. Dorsally the surface is often somewhat reticulate with short acuminate spines at the reticulum wall junctures (see Fig. 14 B). This feature is best seen by using a Scanning Electron Microscope. Ventrally the surface exhibits a porous corrugate granulate appearance (see Fig. 15 B). The periphragm gives rise to vertical lace-like fringes or walls which divide the tract surface into plates. These fringes are fibrous in nature and somewhat variable in height but are usually about 15 Ám high. A cingular fringe is prominent dorsally. The tabulation (see Fig. 13 E-H) is distinct dorsally but is less so ventrally, that is plates 1', 4', 6" and 1''' are sometimes relatively indistinct. The antapical plate is inclined toward the ventral surface. The hoof-shaped operculum exhibits a lacy fringe which encircles it just interior to the border. The tract ranges in height from 70 to 113 Ám, and the width ranges from 65 to 106 Ám. Apical horn about 10 Ám antapical horn about 7 Ám.