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Deflandrea denticulata ssp. minor
Deflandrea denticulata ssp. minor (de Coninck, 1969) Lentin and Williams, 1973
Originally Deflandrea denticulata forma minor, subsequently (and now) Deflandrea denticulata ssp. minor.
Holotype: de Coninck, 1969, pl.1, figs.16-17
Age: Early Eocene
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Original description: [De Coninck, 1969]:
Deflandrea denticulata Alberti, 1959 forma minor n. forma.
(Pl. I, figs. 16 and 17;PL. II, figs. 1 and 2.)
Alberti, 1959, Mitt. Geol. Staatsinst. Hamburg, 28, p. 102, text, fig. 1.
Holotype. —— Kallo —374.5 m. Preparation 4; coord. 52.4-93. Pl. I, figs. 16 and 17.
Diagnosis. — The roughly globular body is enclosed in a theca that forms the apical horn and the antapical horns. A serrated ridge marks the weakly helical and interrupted girdle. I did not observe any archaeopyles. The ornamentation of the theca consists of numerous small teeth on the horns and body.
Body dimensions: about 46 μ by 40 μ
Length of horns: apical: about 25 μ; antapical: from 20 μ to 22 μ
Total wingspan: about 48 μ by 85 μ
Remarks. — The forma minor differs from Alberti's type species by its smaller size and also by its relatively longer horns and divergent antapical horns.
Another specimen of —376 μ, preparation 2; coord. 34.6-104 (Pl. II, figs. 1 and 2) differs from the form minor only by its smaller apical horn and by its less acute and closer antapical horns. Furthermore, it presents an intercalary archaeopyle. It is nevertheless preferable to attribute it to the same form.
Originally Deflandrea denticulata forma minor, subsequently (and now) Deflandrea denticulata ssp. minor.
Holotype: de Coninck, 1969, pl.1, figs.16-17
Age: Early Eocene
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Original description: [De Coninck, 1969]:
Deflandrea denticulata Alberti, 1959 forma minor n. forma.
(Pl. I, figs. 16 and 17;PL. II, figs. 1 and 2.)
Alberti, 1959, Mitt. Geol. Staatsinst. Hamburg, 28, p. 102, text, fig. 1.
Holotype. —— Kallo —374.5 m. Preparation 4; coord. 52.4-93. Pl. I, figs. 16 and 17.
Diagnosis. — The roughly globular body is enclosed in a theca that forms the apical horn and the antapical horns. A serrated ridge marks the weakly helical and interrupted girdle. I did not observe any archaeopyles. The ornamentation of the theca consists of numerous small teeth on the horns and body.
Body dimensions: about 46 μ by 40 μ
Length of horns: apical: about 25 μ; antapical: from 20 μ to 22 μ
Total wingspan: about 48 μ by 85 μ
Remarks. — The forma minor differs from Alberti's type species by its smaller size and also by its relatively longer horns and divergent antapical horns.
Another specimen of —376 μ, preparation 2; coord. 34.6-104 (Pl. II, figs. 1 and 2) differs from the form minor only by its smaller apical horn and by its less acute and closer antapical horns. Furthermore, it presents an intercalary archaeopyle. It is nevertheless preferable to attribute it to the same form.