Helicosphaeroides ampliaperta

(Bramlette &Wilcoxon, 1967) Varol, n. comb. Sep 10, 2020

Set number: 311

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2

10µm

Helicosphaeroides ampliaperta, Early Miocene, Offshore Libya

Set number: 310

1
2

10µm

Helicosphaeroides ampliaperta, Early Miocene, Offshore Libya

Set number: 309

1
2

10µm

Helicosphaeroides ampliaperta, Early Miocene, Offshore Libya

Set number: 308

1
2

10µm

Helicosphaeroides ampliaperta, Early Miocene, Offshore Libya

Set number: 306

1
2

10µm

Helicosphaeroides ampliaperta, Early Miocene, Offshore Libya

Set number: 505

Helicosphaeroides ampliaperta, Early Miocene, Mut Basin, Turkey

Final Epithet

Helicosphaeroides ampliaperta (Bramlette &Wilcoxon, 1967) Varol, n. comb.

Basionym

Helicosphaera ampliaperta Bramlette and Wilcoxon, 1967

Synonyms

Acanthoica cucullata diademata Gaardet, 1955

Description

Helicolith has a symmetrical blanket confined to the central area (not extending the periphery (Type I, Helicosphaeroides ampliaperta type), gradual wing termination and a central area with a large central opening.

Remarks

Helicosphaeroides ampliaperta differs from Helicosphaeroides scissura by having a wide elliptical central opening instead of a narrow elongated opening

References

Bramlette, M. N., Wilcoxon, J. A., 1967. Middle Tertiary calcareous nannoplankton of the Cipero section, Trinidad, W.I. Tulane Studies in Geology and Paleontology 5, 93-131.

Gardet, M., 1955. Contribution à l'étude des coccolithes des terrains néogènes de l'Algérie. Publications du Service de la Carte Géologique de l'Algérie (Nouvelle Série) 5, 477-550.

Taxonomy

Helicosphaeroides

Biostratigraphy

Stratigraphic Range

Burdigalian - Langhian

Age (Ma)

20.43 - 14.86

Holotype

Helicosphaera ampliaperta Bramlette & Wilcoxon, 1967

Early Miocene

Cipero Section, Trinidad