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Leptodinium hyalodermopse
From Fensome et al., 2019:
Leptodinium? hyalodermopse (Cookson and Eisenack, 1958, p.34, pl.3, figs.11–12; text-figs.5–6) Stover and Evitt, 1978, p.170. Holotype: Cookson and Eisenack, 1958, pl.3, figs.11–12; text-figs.5–6; Jan du Chêne et al., 1986a, pl.74, figs.9–10. Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta, thirdly (and now) Leptodinium?, fourthly Rhynchodiniopsis. Jan du Chêne et al. (1986a, p.210) provisionally retained this species in Leptodinium. Questionable assignment: Stover and Evitt (1978, p.170). Age: Neocomian–Aptian.
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Locus typicus: W Australia
Stratum typicum: Neocomian-Aptian
Original description: Cookson and Eisenack, 1958, p. 34: Gonyaualax hyalodermopsis
Theca thin, transparent and smooth, obtrusely biconical to slightly oval. Epitheca and hypotheca nearly equal. Apex sumounted by a short cylindrical horn with a pointed apex. Transverse girdle shallow, distinctly helicoid, longitudinal furrow broad. Sutures with smooth, thin and shallow ledges. Dorsal plates very large. the tabulation is shown in figs. 5-6.
Dimensions: Type - 73 x 55 µm overall, horn 9 µm.
Leptodinium? hyalodermopse (Cookson and Eisenack, 1958, p.34, pl.3, figs.11–12; text-figs.5–6) Stover and Evitt, 1978, p.170. Holotype: Cookson and Eisenack, 1958, pl.3, figs.11–12; text-figs.5–6; Jan du Chêne et al., 1986a, pl.74, figs.9–10. Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta, thirdly (and now) Leptodinium?, fourthly Rhynchodiniopsis. Jan du Chêne et al. (1986a, p.210) provisionally retained this species in Leptodinium. Questionable assignment: Stover and Evitt (1978, p.170). Age: Neocomian–Aptian.
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Locus typicus: W Australia
Stratum typicum: Neocomian-Aptian
Original description: Cookson and Eisenack, 1958, p. 34: Gonyaualax hyalodermopsis
Theca thin, transparent and smooth, obtrusely biconical to slightly oval. Epitheca and hypotheca nearly equal. Apex sumounted by a short cylindrical horn with a pointed apex. Transverse girdle shallow, distinctly helicoid, longitudinal furrow broad. Sutures with smooth, thin and shallow ledges. Dorsal plates very large. the tabulation is shown in figs. 5-6.
Dimensions: Type - 73 x 55 µm overall, horn 9 µm.