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Gonyaulacysta hyalodermopsis
Gonyaualcysta hyalodermopsis (Cookson and Eisenack, 1958) Sarjeant, 1969
Now Leptodinium?. Originally Gonyaulax, subsequently Gonyaulacysta, thirdly (and now) Leptodinium?, fourthly Rhynchodiniopsis.
This combination was not validly published in Saljeant, 1966, since that author did not fully reference the basionym.
Holotype: Cookson and Eisenack, 1958, pl.3, figs.11-12, text-figs.5-6; Jan du Chêne et al., 1986, pl.74, figs.9-10
Locus typicus: Western 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.
Now Leptodinium?. Originally Gonyaulax, subsequently Gonyaulacysta, thirdly (and now) Leptodinium?, fourthly Rhynchodiniopsis.
This combination was not validly published in Saljeant, 1966, since that author did not fully reference the basionym.
Holotype: Cookson and Eisenack, 1958, pl.3, figs.11-12, text-figs.5-6; Jan du Chêne et al., 1986, pl.74, figs.9-10
Locus typicus: Western 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.