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Fibradinium
From Williams et al., 2017:
[Fibradinium, Morgenroth, 1968, p.537–538
Tax. sr. syn.: Phanerodinium, according to Below (1987b, p.36) — however, Lentin and Williams (1993, p.221) retained Fibradinium.
Below, 1987, included Fibradinium, Microdinium, Rhyptocorys and Subtilidinium in synonymy with Phanerodium. Lentin and Williams, 1989, retained these as separate genera.
Type species: Fibradinium annetorpense, Morgenroth, 1968 (pl.42, fig.4)]
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Original description: [Morgenroth, 1968]: (Translation: Stover and Evitt, 1978, p.47):
Description:
Theca without processes, weakly ellipsoidal. Thecal wall composed of two layers of which the inner one is a smooth membrane, the outer one fibrous. Tabulation formula: ?7`, 6", 6, 6```, 1p, 1````. Cingulum equatorial, circular to weakly spiral to the left. Sulcus undifferentiated.
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Modified description:
Stover and Evitt, 1978, p. 47:
Synopsis:
Cysts proximate, subspherical; autophragm fibrous; gonyaulacacean, paratabulation indicated by parasutural ridges, formula: ?7`, 6", 6c, 6```, 1p, 1````, 1-3s; archeopyle at apex, type uncertain.
Description:
Shape: Subspherical.
Wall relationships: Autophragm only.
Wall features: Parasutural ridges low, with granular appearance. Autophragm fibrous.
Paratabulation: Indicated by parasutural ridges; gonyaulacacean, formula: ?7`, 6", 6c, 6```,1p, 1````, 1-3s; number of paraplates at apex not known with certainty, may include intercalaries.
Archaeopyle: At apex, type uncertain; exact outline of archaeopyle and operculum unknown.
Paracingulum: Indicated by six transversely elongate, rectangular paraplates.
Parasulcus: Outlined by parasutural ridges; longitudinally elongate, wide antapically, narrow and subdivided apically.
Size: Small.
Affinities:
Fibradinium differs from Microdinium in having a fibrous rather than a smooth or weakly ornamented autophragm.
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Notes:
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Fibradinium Morgenroth, 1968. Theca without processes, weakly ellipsoidal. Thecal wall composed of two layers of which the inner one is a smooth membrane, the outer one fibrous. Tabulation formula: ?7`, 6", 6c. 6"', 1p, 1"''. Cingulum equatorial, circular to weakly spiral to the left. Sulcus undifferentiated.
[Fibradinium, Morgenroth, 1968, p.537–538
Tax. sr. syn.: Phanerodinium, according to Below (1987b, p.36) — however, Lentin and Williams (1993, p.221) retained Fibradinium.
Below, 1987, included Fibradinium, Microdinium, Rhyptocorys and Subtilidinium in synonymy with Phanerodium. Lentin and Williams, 1989, retained these as separate genera.
Type species: Fibradinium annetorpense, Morgenroth, 1968 (pl.42, fig.4)]
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Morgenroth, 1968]: (Translation: Stover and Evitt, 1978, p.47):
Description:
Theca without processes, weakly ellipsoidal. Thecal wall composed of two layers of which the inner one is a smooth membrane, the outer one fibrous. Tabulation formula: ?7`, 6", 6, 6```, 1p, 1````. Cingulum equatorial, circular to weakly spiral to the left. Sulcus undifferentiated.
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Modified description:
Stover and Evitt, 1978, p. 47:
Synopsis:
Cysts proximate, subspherical; autophragm fibrous; gonyaulacacean, paratabulation indicated by parasutural ridges, formula: ?7`, 6", 6c, 6```, 1p, 1````, 1-3s; archeopyle at apex, type uncertain.
Description:
Shape: Subspherical.
Wall relationships: Autophragm only.
Wall features: Parasutural ridges low, with granular appearance. Autophragm fibrous.
Paratabulation: Indicated by parasutural ridges; gonyaulacacean, formula: ?7`, 6", 6c, 6```,1p, 1````, 1-3s; number of paraplates at apex not known with certainty, may include intercalaries.
Archaeopyle: At apex, type uncertain; exact outline of archaeopyle and operculum unknown.
Paracingulum: Indicated by six transversely elongate, rectangular paraplates.
Parasulcus: Outlined by parasutural ridges; longitudinally elongate, wide antapically, narrow and subdivided apically.
Size: Small.
Affinities:
Fibradinium differs from Microdinium in having a fibrous rather than a smooth or weakly ornamented autophragm.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Notes:
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Fibradinium Morgenroth, 1968. Theca without processes, weakly ellipsoidal. Thecal wall composed of two layers of which the inner one is a smooth membrane, the outer one fibrous. Tabulation formula: ?7`, 6", 6c. 6"', 1p, 1"''. Cingulum equatorial, circular to weakly spiral to the left. Sulcus undifferentiated.