Umbilicosphaera rotula

Classification: Coccolithophores -> Coccolithales -> Calcidiscaceae -> Umbilicosphaera -> Umbilicosphaera rotula
Sister taxa: U. anulus, U. foliosa, U. hulburtiana, U. sibogae, U. jafari, U. rotula, U. bramlettei, U. jordanii, U. protoannulus, U. detecta, U. edgariae, U. henrikseniae, U. sp.,


Citation: Umbilicosphaera rotula (Kamptner, 1956) Varol, 1982
Rank: Species
Basionym: Tremalithus rotula Kamptner, 1956
Synonyms: NB Craspedolithus declivus is probably a synonym of Ceratolithus cristatus HET coccolithomorpha type, but the name has been applied to U. rotula specimens.
Notes & discussion: Was often placed in Geminilithella. The name Tremalithus rotula was invalidly described but the alternative combination Cycloplacolithus rotulus was validated by Kamptner 1956.

Distinguishing features: Coccoliths with wide central-area and narrow rim. Shields of similar size

Farinacci & Howe catalog pages: Tremalithus rotula * , Cyclococcolithus aequiscutum * , Cyclococcolithus cricotus * , Cyclococcolithus aequiscutum * , Umbilicosphaera lordi *

Morphology remarks: Umbilocosphaera coccoliths with wide central-area and narrow rim. Shields of similar size. The distal shield is slightly domed and is formed of shallowly imbricated elements, giving a complex suture pattern. The proximal shield consists of a single cycle of non-imbricated elements with nearly radial sutures, it is nearly flat except for a collar on its lower surface. A well developed tube separates the shields.

See also: Ceratolithus cristatus HET coccolithomorpha type - although unrelated this species can appear very similar;

Search data:
TagsLITHS: placolith, circular, RIM: rim-narrow, CA: vacant,
CSPH: spherical, equant, monomorphic, V-UNITS: distal shield, tube, V-prominent, R-UNITS: prox shield, R-prominent, DETAILS: rim-bicyclic, isogyres oblique,
MetricsLith size: 3->6µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NN16 zone (2.49-3.70Ma, top in Gelasian stage). Data source: Young 1998
First occurrence (base): within NN2 zone (19.00-22.82Ma, base in Aquitanian stage). Data source: Young 1998

Plot of occurrence data:

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Umbilicosphaera rotula, synonyms included - Calcidiscus rotula; Craspedolithus declivus; Cyclococcolithina cricota; Cyclococcolithina rotula; Cyclococcolithus aequiscutum; Cyclococcolithus cricotus; Cyclococcolithus rotula; Cyclolithella cricota; Cyclolithella rotula; Cycolithela rotula; Geminilithella lordii; Geminilithella rotula; Tremalithus rotula; Umbilicosphaera aequiscutum; Umbilicosphaera cricota; Umbilicosphaera cricotus; Umbilicosphaera rotula;
  • space-time plot :: Samples map :: Parent: Umbilicosphaera


    Backman, J. (1980). Miocene-Pliocene nannofossils and sedimentation rates in the Hatton-Rockall Basin, NE Atlantic Ocean. Stockholm Contributions in Geology. 36: 1-91. gs :: ::

    Bown, P. R. & Dunkley Jones, T. (2012). Calcareous nannofossils from the Paleogene equatorial Pacific (IODP Expedition 320 Sites U1331-1334). Journal of Nannoplankton Research. 32(2): 3-51. gs :: view :: open

    Bown, P. R., Dunkley-Jones, T. & Young, J. R. (2007). Umbilicosphaera jordanii Bown 2005 from the Paleogene of Tanzania: confirmation of generic assignment and a Paleocene origination for the family Calcidiscaceae. Journal of Nannoplankton Research. 29(1): 25-30. gs :: view :: open

    de Kaenel, E. & Villa, G. (1996). Oligocene-Miocene calcareous nannofossil biostratigraphy and paleoeecology from the Iberian Abyssal Plain. Proceedings of the Ocean Drilling Program, Scientific Results. 149: 79-145. gs :: view :: open

    Gartner, S. (1967a). Calcareous nannofossils from Neogene of Trinidad, Jamaica, and Gulf of Mexico. University of Kansas Paleontological Contributions, Papers. 29: 1-7. gs :: ::

    Haq, B. U. & Berggren, W. A. (1978). Late Neogene calcareous plankton biochronology of the Rio Grande Rise (South Atlantic Ocean). Journal of Paleontology. 52: 1167-1194. gs :: ::

    Jafar, S. A. (1975). Calcareous nannoplankton from the Miocene of Rotti, Indonesia. Verhandelingen der Koninklijke Nederlandse Akademie van Wetenschappen, Afdeling Natuurkunde. 28: 1-99. gs :: ::

    Kamptner, E. (1948). Coccolithen aus dem Torton des Inneralpinen Wiener Beckens. Anzeiger der Österreichische Akademie der Wissenschaften, Mathematische-Naturwissenschafliche Klasse, Wien. 157: 1-16. gs :: ::

    Kamptner, E. (1956c). Zur Systematik und Nomenklatur der Coccolithineen. Anzeiger der Österreichische Akademie der Wissenschaften, Mathematische-Naturwissenschafliche Klasse, Wien. 93: 4-11. gs :: ::

    Loeblich, A. R. & Tappan, H. (1978). The coccolithophorid genus Calcidiscus Kamptner and its synonyms. Journal of Paleontology. 52: 1390-1392. gs :: ::

    Müller, C. (1974c). Nannoplankton aus dem Mittel-Miozän von Walbersdorf (Burgenland). Senckenbergiana Lethaea. 55: 389-405. gs :: ::

    Müller, C. (1974b). Calcareous nannoplankton, Leg 25 (Western Indian Ocean). Initial Reports of the Deep Sea Drilling Project. 25: 579-633. gs :: view :: open

    Steinmetz, J. C. & Stradner, H. (1984). Cenozoic calcareous nannofossils from Deep Sea Drilling Project Leg 75, Southeast Atlantic Ocean. Initial Reports of the Deep Sea Drilling Project. 75: 671-753. gs :: view :: open

    Theodoridis, S. (1984). Calcareous nannofossil biostratigraphy of the Miocene and revision of the helicoliths and discoasters. Utrecht Micropaleontological Bulletin. 32: 1-271. gs :: ::

    Varol, O. (1982). Calcareous nannofossils from the Antalya Basin, Turkey. Neues Jahrbuch für Geologie und Paläontologie, Monatshefte. 4: 244-256. gs :: ::

    Varol, O. (1989a). Calcareous nannofossil study of the central and western Solomon Islands. Circum-Pacific Council for Energy and Mineral Resources Earth Sciences. 239-268. gs :: view :: open

    Young, J. R. (1998). Neogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 225-265. gs :: ::


    Umbilicosphaera rotula compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 5-8-2020

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