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Cometodinium comatum
Cometodinium? comatum, Srivastava, 1984
Monteil, 1991, questionably included this species in Cometodinium.
Holotype: Srivastava 1984:Pl. 7, fig. 4; figured in Monteil 1991a: Pl. 1, fig. 3
Locus typicus: Sisteron Section, Basses-Alpes, Southeastern France
Stratum typicum: Upper Barremian
Age: Late Barremian
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Original description: [Srivastava 1984, p .29]:
Description:
Cyst spherical to oval, covered with long, thin, hair-like processes; sometimes an equatorial girdle indicated by two irregular, inconspicuous bands formed by distribution pattern of processes; some specimens have a split at one end; processes long, acuminate, hair-like, thin, flexuous
Dimensions:
holotype: Overall diameter 35 µm, shell diameter 18 µm, length of processes 8-10 µm.
Size measurements: Overall diameter 34-42 µm, shell diameter without processes 18-27 µm; length of processes 8-13 µm in 11 specimens of this study.
Affinities:
Cometodinium comatum is distinct from C. obscurum in being smaller, with finer, shorter hair-like processes.
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Supplemental description:
Monteil 1991a, p. 440-441:
Description:
Chorate (skolochorate) cysts with subspherical body.
Hair-like processes, very thin and very numerous, flexuous, apparently nontabular, nonfibrous, cylindrical, distally closed, similar in size and shape. Process base undivided. Tip evexate.
Archeopyle presumably apical, type (tA); single operculum attached.
Paratabulation rarely expressed; occasionally indicated by a split at one end and/or by the paracingulum. Paracingulum may be suggested by an alignment of two parallel, more or less equatorial, rows of processes Parasulcus not indicated
Dimensions:
Holotype Range (11 specimens)
Cyst diameter 35 µm 35-42 µm
Central body diameter 18 µm18-27 µm
Length of processes 8-10 µm 8-13 µm
Remarks:
the description given by SRIVASTAVA (1984, p. 29) is not emended but is rewritten to be consistent with the other diagnoses presented here. The archeopyle type being uncertain, the species comatum is provisionally accepted in the genus Cometodinium emend.
Affinities:
Cometodinium ? comatum differs from C. obscurum emend in being smaller and in having finer, shorter, hair-like processes (compare Pl. 3, fig. 6, 7).
Monteil, 1991, questionably included this species in Cometodinium.
Holotype: Srivastava 1984:Pl. 7, fig. 4; figured in Monteil 1991a: Pl. 1, fig. 3
Locus typicus: Sisteron Section, Basses-Alpes, Southeastern France
Stratum typicum: Upper Barremian
Age: Late Barremian
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Srivastava 1984, p .29]:
Description:
Cyst spherical to oval, covered with long, thin, hair-like processes; sometimes an equatorial girdle indicated by two irregular, inconspicuous bands formed by distribution pattern of processes; some specimens have a split at one end; processes long, acuminate, hair-like, thin, flexuous
Dimensions:
holotype: Overall diameter 35 µm, shell diameter 18 µm, length of processes 8-10 µm.
Size measurements: Overall diameter 34-42 µm, shell diameter without processes 18-27 µm; length of processes 8-13 µm in 11 specimens of this study.
Affinities:
Cometodinium comatum is distinct from C. obscurum in being smaller, with finer, shorter hair-like processes.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Supplemental description:
Monteil 1991a, p. 440-441:
Description:
Chorate (skolochorate) cysts with subspherical body.
Hair-like processes, very thin and very numerous, flexuous, apparently nontabular, nonfibrous, cylindrical, distally closed, similar in size and shape. Process base undivided. Tip evexate.
Archeopyle presumably apical, type (tA); single operculum attached.
Paratabulation rarely expressed; occasionally indicated by a split at one end and/or by the paracingulum. Paracingulum may be suggested by an alignment of two parallel, more or less equatorial, rows of processes Parasulcus not indicated
Dimensions:
Holotype Range (11 specimens)
Cyst diameter 35 µm 35-42 µm
Central body diameter 18 µm18-27 µm
Length of processes 8-10 µm 8-13 µm
Remarks:
the description given by SRIVASTAVA (1984, p. 29) is not emended but is rewritten to be consistent with the other diagnoses presented here. The archeopyle type being uncertain, the species comatum is provisionally accepted in the genus Cometodinium emend.
Affinities:
Cometodinium ? comatum differs from C. obscurum emend in being smaller and in having finer, shorter, hair-like processes (compare Pl. 3, fig. 6, 7).