Reticulofenestra minuta


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

Taxonomy:

Citation: Reticulofenestra minuta Roth, 1970
Rank: Species
Synonyms: Reticulofenestra alabamensis Roth, 1970
Notes & discussion: Used in a broad sense for very small (<3μm), elliptical reticulofenestrids. Although they typically have open central areas, in SEM many specimens are seen with closed central areas and at this size it may be difficult to distinguish the different varieties in LM. SEM observations suggest there is considerable diversity of form in this size range. [Bown & Newsam 2017]

Distinguishing features: Coccoliths very small, <3µm. Probably includes several different species.

Farinacci & Howe catalog pages: Reticulofenestra minuta * , Reticulofenestra alabamensis * ,


Size: Type material length 1.5-2µm

Search data:
TagsLITHS: placolith, elliptical, RIM: inner-tube-broad, CA: grill, vacant,
CSPH: spherical, monomorphic, V-UNITS: none, R-UNITS: all, c-str, distal shield, prox shield, tube, DETAILS: ca_conjunct, isogyres kinked, isogyres oblique, rim-unicyclic,
MetricsLith size: 1->3µm;
Sources:
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: Theis name is applied from the Eocene to the Pliocene to very small Reticulofenestra specimens.
Last occurrence (top): within Pliocene Epoch (2.59-5.33Ma, top in Piacenzian stage). Data source: Young 1998
First occurrence (base): within NP13 zone (49.11-50.50Ma, base in Ypresian stage). Data source: [PRB rough estimate]

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 minuta, synonyms included - Reticulofenestra alabamensis; Reticulofenestra martinii; Reticulofenestra minuta; Reticulofenestra minuta (<3 microns); Reticulofenestra sp.(small); Reticulofenestra spp. (2-3 µm); space-time plot :: Samples map :: Parent: R. pseudoumbilicus group

    References:

    Bown, P. R. & Newsam, C. (2017). Calcareous nannofossils from the Eocene North Atlantic Ocean (IODP Expedition 342 Sites U1403–1411). Journal of Nannoplankton Research. 37(1): 25-60. gs

    Roth, P. H. (1970). Oligocene calcareous nannoplankton biostratigraphy. Eclogae Geologicae Helvetiae. 63: 799-881. gs

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

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    Reticulofenestra minuta compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 21-7-2019

    Taxon Search:
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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=1174 Go to Archive.is to create a permanent copy of this page - citation notes
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    Comments (1)

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    Ines Galovic (Zagreb)

    Fig. 01 and 02 of BownNewsam 2017 is much closer to R. producta regarding to (nearly) closed central area as distinguishing feature in original description and I would be placed there.

    All best :)

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