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Dracodinium simile
Dracodinium simile (Eisenack, 1954) Costa and Downie, 1979
Originally Wetzeliella, subsequently (and now) Dracodinium.
Holotype: Eisenack, 1954, pl.8, fig.10
Locus typicus: Samland, E Prussia
Stratum typicum: Early Oligocene
Translation Eisenack, 1954: LPP
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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.
Dracodinium simile (Eisenack, 1954b) Costa and Downie, 1979, is similar to Wetzeliella articulata but considerably smaller. Endocyst almost filling pericyst and often with bulges in the vicinity of the horns. The horns merge into the margins especially the wide and low apical horn. There are well-developed lateral horns, so that the length breadth ratio can be 1:1.2. Processes numerous look furcate. This species differs from D. samlandicum in the lateral horns merging with the lateral margins and in the low and wide apical horn. Dracodinium samlandicum does not have a soleiform archeopyle. Size: length 89-124 µm, width 100-114 µm.
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Original descripton: Eisenack, 1954, p. 58: Wetzeliella similis
Diagnosis: Overall similar to to W. articulata, but essentially smaller. Capsule with firm (dark redbrown) wall, filling the outer shell filling the outer shell almost to the rim, so that marginally, between them, there is hardly any space left, often with small bulges (ears) entering the lateral horns. The horns uniting with the sides, especially the broad and low apical horn; the lateral horns extending strongly, up to a L:B of 1:1.2. Bristles thin, almost hair-like and quite numerous, distally with scarcely indicated furcation.
Discussion and description: the difference with W. samlandica is in the horns, uniting with the sides, especially in the broad and low apical horn. The pylome is, as usually, located below he apex on the ffront side; it may, however, also be located entirely apically, with the apex detached.
Dimensions: Holotype 97:100 Ám, capsule 67 Ám. The length varies from 89 to 124 Ám, the width between 100 and 114 Ám, on an average ( 4 specimens) 104 and 106 Ám; in addition, there is a specimen with extremely well developed lateral horns, with the 76 and 130 Ám, although it is not with certainty belonging to this genus.
Heilmann-Clausen in Heilmann-Clausen and Costa, 1989, p. 465, pl. 3, fig.1,2: Dracodinium cf. simile
De Coninck, 1976: Wetzeliella aff. simile
The processes in this form are stronger than the hairlike processes typical for D. simile, and the periphragm is more distinctly concave between the process bases.
Originally Wetzeliella, subsequently (and now) Dracodinium.
Holotype: Eisenack, 1954, pl.8, fig.10
Locus typicus: Samland, E Prussia
Stratum typicum: Early Oligocene
Translation Eisenack, 1954: LPP
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Dracodinium simile (Eisenack, 1954b) Costa and Downie, 1979, is similar to Wetzeliella articulata but considerably smaller. Endocyst almost filling pericyst and often with bulges in the vicinity of the horns. The horns merge into the margins especially the wide and low apical horn. There are well-developed lateral horns, so that the length breadth ratio can be 1:1.2. Processes numerous look furcate. This species differs from D. samlandicum in the lateral horns merging with the lateral margins and in the low and wide apical horn. Dracodinium samlandicum does not have a soleiform archeopyle. Size: length 89-124 µm, width 100-114 µm.
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Original descripton: Eisenack, 1954, p. 58: Wetzeliella similis
Diagnosis: Overall similar to to W. articulata, but essentially smaller. Capsule with firm (dark redbrown) wall, filling the outer shell filling the outer shell almost to the rim, so that marginally, between them, there is hardly any space left, often with small bulges (ears) entering the lateral horns. The horns uniting with the sides, especially the broad and low apical horn; the lateral horns extending strongly, up to a L:B of 1:1.2. Bristles thin, almost hair-like and quite numerous, distally with scarcely indicated furcation.
Discussion and description: the difference with W. samlandica is in the horns, uniting with the sides, especially in the broad and low apical horn. The pylome is, as usually, located below he apex on the ffront side; it may, however, also be located entirely apically, with the apex detached.
Dimensions: Holotype 97:100 Ám, capsule 67 Ám. The length varies from 89 to 124 Ám, the width between 100 and 114 Ám, on an average ( 4 specimens) 104 and 106 Ám; in addition, there is a specimen with extremely well developed lateral horns, with the 76 and 130 Ám, although it is not with certainty belonging to this genus.
Heilmann-Clausen in Heilmann-Clausen and Costa, 1989, p. 465, pl. 3, fig.1,2: Dracodinium cf. simile
De Coninck, 1976: Wetzeliella aff. simile
The processes in this form are stronger than the hairlike processes typical for D. simile, and the periphragm is more distinctly concave between the process bases.