Micula decussata

Set number: 2121

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10µm

Aguablanca Creek, Colombia

Set number: 2114

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10µm

Aguablanca Creek, Colombia

In the mobile mount

Set number: 2105

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10µm

Aguablanca Creek, Colombia

Set number: 2131

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10µm

Aguablanca Creek, Colombia

In the mobile mount.

Set number: 2110

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10µm

Aguablanca Creek, Colombia

Set number: 2118

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10µm

Quebrada La Llana, Colombia

Set number: 2113

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10µm

Aguablanca Creek, Colombia

Set number: 2102

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10µm

Cyprus

Set number: 2100

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10µm

Arabian Peninsula (The specific location cannot be disclosed)

Set number: 2098

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10µm

Arabian Peninsula (The specific location cannot be disclosed)

Set number: 2094

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10µm

Mauritania, West Africa

Set number: 2093

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10µm

Arabian Peninsula (The specific location cannot be disclosed)

Set number: 2092

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10µm

Arabian Peninsula (The specific location cannot be disclosed)

Set number: 2116

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10µm

Quebrada La Llana, Colombia

Final Epithet

Micula decussata Vekshina, 1959

Basionym

Micula decussata Vekshina, 1959

Remarks

Micula decussata, a cuboid species, exhibits blocks resembling a cobbler’s anvil with a small cross aligned with the blocks at the centre. Both the blocks and the central cross display parallel extinction and length-fast (-) elongation.

In this study, Micula decussata is preferred over the superficially similar Micula staurophora, as the holotype of the latter is represented by a drawing in a constant extinction position characteristic of a Micula. This detail strongly indicates that Micula staurophora is a distinct species, potentially originating from the Eocene.

References

Vekshina, V. N., 1959. Coccolithophoridae of the Maastrichtian deposits of the West Siberian lowlands. Trudyi Instituta Geologii i Geogiziki, Sibiriskoe Otlodelenie, Akademiya Nauk SSSR (Nauka) Moscow 2, 56-81.

Taxonomy

Micula

Biostratigraphy

Stratigraphic Range

Late Coniacian - Late Maastrichtian

Age (Ma)

87.50? - 66.04?

Holotype

Micula decussata Vekshina, 1959

Maastrichtian

Turgai depression, Semiozernoe, Gan'kino series, Russia