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Charlesdowniea crassoramosa
Charlesdowniea crassoramosa, (Williams and Downie, 1966), Lentin and Vozzhennikovia, 1989
Originally Wetzeliella tenuivirgula var. crassoramosa, subsequently Wetzeliella tenuivirgula subsp. crassoramosa, thirdly Kisselevia tenuivirgula subsp. crassoramosa, fourthly Kisselevia crassoramosa, fifthly Charlesdowniea crassoramosa, sixthly (and now) Sophismatia crassoramosa.
This taxon was raised to subspecies rank by Lentin and Williams, 1973, and to species rank by Damassa, 1979.
Holotype: Williams and Downie, 1966, pl.19, fig.7
Locus typicus: London Clay, Whitecliff, England
Stratum typicum: Early Eocene
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Original description as Wetzeliella (Wetzeliella) tenuivirgula var. crassoramosa: [Williams and Downie, 1966, p. 189]:
Description:
This differs from the typical W. tenuivirgula in the nature of the distal branching of the processes; the secae and trabeculae are much wider and taeniate, the reticulum being much stronger as a result. The processes forming the simulate complexes are often united by particularly wide taeniate secae (or bars) up to 3 µm in width. Frequently there are simple unconnected spines with blunt or bulbous terminations branching off from the bars and trabeculae. In outline, the outer shell lies between that of W. articulata and W. symmetrica, individuals with an outline approaching the latter species predominating.
Dimensions:
Holotype: outer shell length 125 µm; breadth 122 µm. Capsule-length 80 µm; breadth 71 µm.
Observed range: outer shell length 125-182 µm; breadth 122-160 µm; Capsule, length 80-144 µm; breadth 71-103 µm.
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Notes:
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999
Charlesdowniea crassiramosa (Williams and Downie, 1966b) Lentin and Vozzhennikova, 1989. The archeopyle is hyperepeliform.
Size: pericyst length 125-182 µm, width122-160 µm, endocyst length 80-144 µm, width 71-103 µm
Originally Wetzeliella tenuivirgula var. crassoramosa, subsequently Wetzeliella tenuivirgula subsp. crassoramosa, thirdly Kisselevia tenuivirgula subsp. crassoramosa, fourthly Kisselevia crassoramosa, fifthly Charlesdowniea crassoramosa, sixthly (and now) Sophismatia crassoramosa.
This taxon was raised to subspecies rank by Lentin and Williams, 1973, and to species rank by Damassa, 1979.
Holotype: Williams and Downie, 1966, pl.19, fig.7
Locus typicus: London Clay, Whitecliff, England
Stratum typicum: Early Eocene
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description as Wetzeliella (Wetzeliella) tenuivirgula var. crassoramosa: [Williams and Downie, 1966, p. 189]:
Description:
This differs from the typical W. tenuivirgula in the nature of the distal branching of the processes; the secae and trabeculae are much wider and taeniate, the reticulum being much stronger as a result. The processes forming the simulate complexes are often united by particularly wide taeniate secae (or bars) up to 3 µm in width. Frequently there are simple unconnected spines with blunt or bulbous terminations branching off from the bars and trabeculae. In outline, the outer shell lies between that of W. articulata and W. symmetrica, individuals with an outline approaching the latter species predominating.
Dimensions:
Holotype: outer shell length 125 µm; breadth 122 µm. Capsule-length 80 µm; breadth 71 µm.
Observed range: outer shell length 125-182 µm; breadth 122-160 µm; Capsule, length 80-144 µm; breadth 71-103 µm.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Notes:
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999
Charlesdowniea crassiramosa (Williams and Downie, 1966b) Lentin and Vozzhennikova, 1989. The archeopyle is hyperepeliform.
Size: pericyst length 125-182 µm, width122-160 µm, endocyst length 80-144 µm, width 71-103 µm