Zeugrhabdotus embergeri

(Noël, 1959) Perch-Nielsen, 1984 Jun 09, 2025

Set number: 1250

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10µm

Unknown Location

Final Epithet

Zeugrhabdotus embergeri (Noël, 1959) Perch-Nielsen, 1984

Basionym

Discolithus embergeri Noël, 1959

Description

Optical Properties: The outer wall shows length-fast (-) elongation, while the proto-inner wall and distal process show length-slow (+) elongation in the side view.

Remarks

Large species of Zeugrhabdotus exceeding 8.0 μm are characterised by a wall visible distally and a central area spanned by a transverse bar that supports a massive distal process. When observed in a mobile mount, the side view shows that the distally widening outer wall obscures the distally tapering proximal proto-inner wall. In contrast, the genus Gorkaea features a distally gently widening, fully developed inner wall that partly obscures the distally tapering, very narrow outer wall.

References

Noël, D. 1959. Étude de coccolithes du Jurassique et du Crétacé inférieur. Publications du Service de la Carte Géologique de l'Algérie Bulletin. 20: 155-196.

Perch-Nielsen, K. 1984. Validation of new combinations. INA Newsletter. 6(1): 42-46.

Taxonomy

Zeugrhabdotus

Biostratigraphy

Stratigraphic Range

Early Tithonian - Late Maastrichtian

Age (Ma)

148.79 - 66.04

Zone(s)

JC23 - CC26

Holotype

Discolithus embergeri Noël, 1959

Tithonian / Valanginian

Kef Talrempt, Ampère - Batna, Algeria.