Heterorhabdus surirellus

Deflandre & Fert, 1954 Feb 12, 2026

Set number: 3126

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10µm

Heterorhabdus surirellus, Late Campanian, The specific location cannot be disclosed.

Set number: 3128

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10µm

Heterorhabdus surirellus, Late Maastrichtian, The specific location cannot be disclosed.

Set number: 3127

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10µm

Heterorhabdus surirellus, Late Maastrichtian, The specific location cannot be disclosed.

Set number: 3125

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10µm

Heterorhabdus surirellus, Late Maastrichtian, The specific location cannot be disclosed.

Final Epithet

Heterorhabdus surirellus Deflandre & Fert, 1954

Basionym

Discolithus surirella Deflandre & Fert, 1954

Synonyms

Cretarhabdus cantianus Black, 1973

Description

Species of Heterorhabdus are constructed of a cretarhabdid pelaga surrounding a large central area spanned by a distinct axial cross that supports a distal process. The inter-cross area is occupied by lateral bars that delimit pores arranged in a single complete concentric cycle. Each quadrant typically contains four pores formed by three lateral bars, a feature characteristic of Heterorhabdus surirellus.

Optical Properties

Heterorhabdus surirellus exhibits first-order, slightly greyish-white interference colours. In plan view under crossed polars, the pelaga shows inclined extinction and length-fast (–) elongation.

References

Black, M. 1973. British Lower Cretaceous Coccoliths. I-Gault Clay (Part 2). Palaeontographical Society Monograph 127: 49-112.

Deflandre, G. & Fert, C. 1954. Observations on current and fossil coccolithophorids in ordinary and electron microscopy. Annales de Paléontologie 40: 115-176.

Taxonomy

Heterorhabdus

Biostratigraphy

Stratigraphic Range

Early Berriasian - Late Maastrichtian

Age (Ma)

143.10? - 66.04?

Holotype

Discolithus surirellus Deflandre & Fert, 1954

Senonian

Vanves, Seine, France.