Reticulofenestra minutula

Classification: Coccolithophores -> Isochrysidales -> Noelaerhabdaceae -> Reticulofenestra -> R. pseudoumbilicus group -> Reticulofenestra minutula
Sister taxa: R. calicis, R. pseudoumbilicus, R. haqii, R. minuta, R. minutula, R. asanoi, R. kahniae, R. rotaria, R. pospichalii,


Citation: Reticulofenestra minutula (Gartner, 1967) Haq and Berggren, 1978
Rank: Species
Basionym: Coccolithus minutulus Gartner, 1967
Notes & discussion: N.B. Coccolithus doronicoides Black and Barnes, 1961. According to Young (1998) "The holotype of this species is a proximal view TEM of a reticulofenestrid coccolith 3.4 µm long which might be either a Gephyrocapsa or Reticulofenestra, as it is not possible to tell if a bridge is present. Re-examination of the type material (HMS Challenger dredging 338) reveals that it contains an Holocene or Late Pleistocene assemblage, with minimal reworking. The assemblage contains abundant Gephyrocapsa oceanica but no true Reticulofenestra of this size. So Coccolithus doronicoides is best regarded as a junior synonym of G. oceanica Kamptner, 1943 and the name should certainly not be used for Neogene Reticulofenestra specimens."

Distinguishing features: Coccoliths small 3-5µm, without slits, intergrades with Pseudoemiliania lacunosa.

Farinacci & Howe catalog pages: Coccolithus minutulus + * , Reticulofenestra ampla * , Coccolithus doronicoides *

Morphology remarks: Intergrades with Pseudoemiliania ovata which is similar but has a few slits in the distal shield. Coccoospheres containing examples of both "species" can occur. See also discussion in Young (1990)

Search data:
TagsLITHS: placolith, elliptical, RIM: inner-tube-broad, CA: grill, vacant,
CSPH: spherical, equant, monomorphic, V-UNITS: none, R-UNITS: all, c-str, distal shield, prox shield, tube, R-prominent, DETAILS: ca_conjunct, isogyres kinked, isogyres oblique, rim-unicyclic,
MetricsLith size: 3->5µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NN18 zone (1.93-2.39Ma, top in Gelasian stage). Data source: Young 1998
First occurrence (base): within NN15 zone (3.70-3.92Ma, base in Zanclean 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: Reticulofenestra minutula, synonyms included - Coccolithus doronicoides; Coccolithus minutulus; Crenalithus doronicoides; Cyclicargolithus doronicoides; Dictyococcites minutus; Gephyrocapsa doronicoides; Reticulofenestra doronicoides; Reticulofenestra minutula; Reticulofenestra minutula (3-5 microns); Reticulofenestra minutulus; Reticulofenestra spp. (>6 µm); Reticulofenestra spp. (3-4 µm); Reticulofenestra spp. (4-5 µm); Reticulofenestra spp. (5-6 µm);
  • space-time plot :: Samples map :: Parent: R. pseudoumbilicus group


    Black, M. & Barnes, B. (1961). Coccoliths and discoasters from the floor of the South Atlantic Ocean. Journal of the Royal Microscopical Society. 80: 137-147. gs :: ::

    Gartner, S. (1967a). Calcareous nannofossils from Neogene of Trinidad, Jamaica, and Gulf of Mexico. Paleontological Contributions, University of Kansas. 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. Koninklijke Nederlandse Akademie van Wetenschappen; Afdeling Natuurkunde Verhandelingen. 28: 1-99. gs :: ::

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

    Pujos, A. (1985a). Cenozoic nannofossils, central equatorial Pacific, Deep Sea Drilling Project Leg 85. Initial Reports of the Deep Sea Drilling Project. 85: 581-607. gs :: view :: open

    Sato, T., Kameo, K. & Takayama, T. (1991). Coccolith biostratigraphy of the Arabian Sea. Proceedings of the Ocean Drilling Program, Scientific Results. 117: 37-54. gs :: view :: open

    Young, J. R. (1990). Size variation of Neogene Reticulofenestra coccoliths from Indian Ocean DSDP cores. Journal of Micropalaeontology. 9: 71-86. gs :: view :: open

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


    Reticulofenestra minutula compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 2-6-2020

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