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Leptodinium micropunctatum
From Fensome et al., 2019:
Leptodinium? micropunctatum Jain and Millepied, 1975, p.139, pl.2, figs.32–33. Holotype: Jain and Millepied, 1975, pl.2, fig.32, lost according to Jan du Chêne et al. (1986a, p.211). Originally Leptodinium, subsequently (and now) Leptodinium?. Questionable assignment: Stover and Evitt (1978, p.170) as a problematic species. Taxonomic senior synonym: Oodnadattia tuberculata, according to Below (1981a, p.107) — however, Lentin and Williams (1981, p.173) retained Leptodinium? micropunctatum. Age: early–?late Aptian.
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Original description: [Jain and Millepied, 1975]:
Leptodinium micropunctatum sp. nov. (Pl. 2, Figs. 32-33)
Holotype - P1. 2, Fig. 32; Slide No. 7949-2.
Type locality - Bore hole no. CM-1; depth 3340 metres; Senegal Basin, W. Africa.
Horizon - Lower-?Upper Aptian.
Diagnosis – Shell ovoidal, tabulation not clearly descernible; 4', 0a, ? 4", 7C, ?3'", 1""; crests high, scabrate with smooth outer margin. Girdle distinct, laevorotatory, spiral, broad; sulcus remains in hypotract. Archaeopyle not seen. Body wall thick, micropunctate.
Measurements
Body size: holotype: 52 x 36 μm, range: 45-55 x 35-40 μm
Overall size: holotype: 64 × 60 μm, range: 50 x 64 x 50-60 μm
Crest height: holotype: 4-8 μm, range: 4-12 μm
Comparison - Leptodinium micropunctatum sp. nov. differs from other species of the genus in its micropunctate body wall and scabrate boundary crest surface; L. alectrolophum Sarjeant (1966) resembles best but differs in having granulose body and perforate crests.
Remarks - Present forms in their most of the features, e.g., shape, size and tabulation resemble Leptodinium but the absence of archaeopyle leaves a doubt for their exact placement. It differs from Plerodinium in having cingular plates, but compares well with Meiourogonyaulax Sarjeant (1966) in having similar tabulation and raised boundary crests.
Leptodinium? micropunctatum Jain and Millepied, 1975, p.139, pl.2, figs.32–33. Holotype: Jain and Millepied, 1975, pl.2, fig.32, lost according to Jan du Chêne et al. (1986a, p.211). Originally Leptodinium, subsequently (and now) Leptodinium?. Questionable assignment: Stover and Evitt (1978, p.170) as a problematic species. Taxonomic senior synonym: Oodnadattia tuberculata, according to Below (1981a, p.107) — however, Lentin and Williams (1981, p.173) retained Leptodinium? micropunctatum. Age: early–?late Aptian.
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Original description: [Jain and Millepied, 1975]:
Leptodinium micropunctatum sp. nov. (Pl. 2, Figs. 32-33)
Holotype - P1. 2, Fig. 32; Slide No. 7949-2.
Type locality - Bore hole no. CM-1; depth 3340 metres; Senegal Basin, W. Africa.
Horizon - Lower-?Upper Aptian.
Diagnosis – Shell ovoidal, tabulation not clearly descernible; 4', 0a, ? 4", 7C, ?3'", 1""; crests high, scabrate with smooth outer margin. Girdle distinct, laevorotatory, spiral, broad; sulcus remains in hypotract. Archaeopyle not seen. Body wall thick, micropunctate.
Measurements
Body size: holotype: 52 x 36 μm, range: 45-55 x 35-40 μm
Overall size: holotype: 64 × 60 μm, range: 50 x 64 x 50-60 μm
Crest height: holotype: 4-8 μm, range: 4-12 μm
Comparison - Leptodinium micropunctatum sp. nov. differs from other species of the genus in its micropunctate body wall and scabrate boundary crest surface; L. alectrolophum Sarjeant (1966) resembles best but differs in having granulose body and perforate crests.
Remarks - Present forms in their most of the features, e.g., shape, size and tabulation resemble Leptodinium but the absence of archaeopyle leaves a doubt for their exact placement. It differs from Plerodinium in having cingular plates, but compares well with Meiourogonyaulax Sarjeant (1966) in having similar tabulation and raised boundary crests.