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Leptodinium reticulatum
From Fensome et al., 2019:
Leptodinium? reticulatum (Nagy, 1969, p.293, pl.1, figs.7,10; text-figs.4a–b) Lentin and Williams, 1973, p.88. Holotype: Nagy, 1969, pl.1, figs.7,10; Jan du Chêne et al., 1986a, pl.74, figs.5–6. Originally Gonyaulax (Appendix B), subsequently Leptodinium, thirdly (and now) Leptodinium?. Questionable assignment: Stover and Evitt (1978, p.171) as a problematic species. Jan du Chêne et al. (1986a, p.211–212) recommended that this name be restricted to the holotype. Age: Late Miocene.
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Original description: [Nagy, 1969]:
Gonyaulax reticulatus n. sp.
Plate I, Fig. 7, 10
Holotype: Borehole H. 53, sample No 5, slide No 2, 42x104.3.
Locus typicus: Hidas.
Stratum typicum: Upper Pannonian, silty clay-marl, borehole H. 53, depth 134,8 to 135,5 m.
Diagnosis: Biconical form of 63 by 52 μ size, epitheca rounded; tabulation approximately 3', 1a, 6” , 6g, 6’” , 1”” . The base of the hypotheca is nearly straight. Surface coarsely reticulate. Zone subequatorial (See Fig. 4).
Differential diagnosis: The new form differs from G. pannonicus with longer shape and reticulate surface. Our specimen is fairly similar to the ventral part of Jurassic Gonyaulax amabilis Defl . 1939, but the Jurassic specimen is 38 p, only and has not a reticulate surface.
Remarks: The theca faces the viewer with its dorsal side; it is hard to observe its ventral side.
A single specimen occurred in our material.
Leptodinium? reticulatum (Nagy, 1969, p.293, pl.1, figs.7,10; text-figs.4a–b) Lentin and Williams, 1973, p.88. Holotype: Nagy, 1969, pl.1, figs.7,10; Jan du Chêne et al., 1986a, pl.74, figs.5–6. Originally Gonyaulax (Appendix B), subsequently Leptodinium, thirdly (and now) Leptodinium?. Questionable assignment: Stover and Evitt (1978, p.171) as a problematic species. Jan du Chêne et al. (1986a, p.211–212) recommended that this name be restricted to the holotype. Age: Late Miocene.
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Original description: [Nagy, 1969]:
Gonyaulax reticulatus n. sp.
Plate I, Fig. 7, 10
Holotype: Borehole H. 53, sample No 5, slide No 2, 42x104.3.
Locus typicus: Hidas.
Stratum typicum: Upper Pannonian, silty clay-marl, borehole H. 53, depth 134,8 to 135,5 m.
Diagnosis: Biconical form of 63 by 52 μ size, epitheca rounded; tabulation approximately 3', 1a, 6” , 6g, 6’” , 1”” . The base of the hypotheca is nearly straight. Surface coarsely reticulate. Zone subequatorial (See Fig. 4).
Differential diagnosis: The new form differs from G. pannonicus with longer shape and reticulate surface. Our specimen is fairly similar to the ventral part of Jurassic Gonyaulax amabilis Defl . 1939, but the Jurassic specimen is 38 p, only and has not a reticulate surface.
Remarks: The theca faces the viewer with its dorsal side; it is hard to observe its ventral side.
A single specimen occurred in our material.