Retecapsa schizobrachiata


Classification: Mesozoic -> Podorhabdales -> Cretarhabdaceae -> Retecapsa -> Retecapsa schizobrachiata
Sister taxa: R. beckii, R. escaigii, R. surirella, R. crenulata, R. angustiforata, R. octofenestrata, R. schizobrachiata, R. incompta, R. ficula, R. sp.,

Distinguishing features: Retecapsa with relatively broad central area spanned by an axial cross with one narrow lateral bar in each quadrant located towards the end of the central area. The 8 central area holes are of unequal size.


Taxonomy:

Citation: Retecapsa schizobrachiata (Gartner, 1968) Grün in Grün and Allemann, 1975
Rank: Species
Basionym: Vekshinella schizobrachiata Gartner, 1968
Variants:
Synonyms:

Farinacci & Howe catalog pages: Vekshinella schizobrachiata * , Retecapsa levis * , Retecapsa tridentata *

Distinguishing features: Retecapsa with relatively broad central area spanned by an axial cross with one narrow lateral bar in each quadrant located towards the end of the central area. The 8 central area holes are of unequal size.

Geological Range:
Notes: There appear to be two sets of occurrences recorded: 

Possibly two separate species are involved, in whichcase the Jurassic form should be called R. tridentata. However, note that R. angustiforata occurs in the intervening interval, and is distinguised only by having more prominent lateral bars, and a very large calyx  [my interpretation - JRY 2018]
Last occurrence (top): at top of Maastrichtian Stage (100% up, 66Ma, in Maastrichtian stage). Data source: Lees & Bown 2005 - consistently present to end Cret
First occurrence (base): within Early Callovian Substage (164.63-166.07Ma, base in Callovian stage). Data source: Bown & Cooper 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: Retecapsa schizobrachiata, synonyms included - Cretarhabdus schizobrachiatus; Retecapsa schizobrachiata;
  • space-time plot :: Samples map :: Parent: Retecapsa

    References:

    Applegate, J. L. & Bergen, J. A. (1988). Cretaceous calcareous nannofossil biostratigraphy of sediments recovered from the Galicia Margin, ODP Leg 103. Proceedings of the Ocean Drilling Program. Scientific Results. 103: 293-348. gs

    Black, M. (1971a). Coccoliths of the Speeton Clay and Sutterby Marl. Proceedings of the Yorkshire Geological Society. 38: 381-424. gs

    Black, M. (1972). British Lower Cretaceous Coccoliths. I-Gault Clay (Part 1). Palaeontographical Society Monograph. 126: 1-48. gs

    Blair, S. A. & Watkins, D. K. (2009). High-resolution calcareous nannofossil biostratigraphy for the Coniacian/Santonian Stage boundary, Western Interior Basin. Cretaceous Research. 30(2): 367-384. gs

    Bown, P. R. & Cooper, M. K. E. (1998). Jurassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 34-85. gs

    Bukry, D. (1969). Upper Cretaceous coccoliths from Texas and Europe. The University of Kansas Paleontological Contributions. Article 51 (Protista 2): 1-79. gs

    Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs

    Gartner, S. (1968). Coccoliths and related calcareous nannofossils from Upper Cretaceous deposits of Texas and Arkansas. The University of Kansas Paleontological Contributions. Article 48 (Protista 1): 1-56. gs

    Grün, W. & Allemann, F. (1975). The Lower Cretaceous of Caravaca (Spain): Berriasian Calcareous Nannoplankton of the Miravetes Section (Subbetic Zone, Prov. of Murcia). Eclogae Geologicae Helvetiae. 68: 147-211. gs

    Grün, W. & Zweili, F. (1980). Das kalkige Nannoplankton der Dogger-Malm-Grenze im Berner Jura bei Liesberg (Schweiz). Jahrbuch der Geologischen Bundesanstalt. 123: 231-341. gs

    Lambert, B. (1987). Nannofossiles calcaires de l'Albien supérieur et du Vraconnien du Cameroun méridional. Cahiers de Micropaléontologie. 2(2): 33-60. gs

    Lees, J. A. & Bown, P. R. (2005). Upper Cretaceous calcareous nannofossil biostratigraphy, ODP Leg 198 (Shatsky Rise, Northwest Pacific Ocean). Proceedings of the Ocean Drilling Program. Scientific Results. 198: 1-60. gs

    Shafik, S. & Stradner, H. (1971). Nannofossils from the Eastern Desert, Egypt. Jahrbuch der Geologischen Bundesanstalt Sonderband. 17: 69-104. gs

    Thibault, N. (2010). Calcareous nannofossils from the boreal Upper Campanian- Maastrichtian chalk of Denmark. Journal of Nannoplankton Research. 30(1): 39-56. gs

    Verbeek, J. W. (1977). Calcareous nannoplankton biostratigraphy of Middle and Upper Cretaceous deposits in Tunisia, southern Spain and France. Utrecht Micropaleontological Bulletin. 16: 1-157. gs


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    Retecapsa schizobrachiata compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-12-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=11004 Go to Archive.is to create a permanent copy of this page - citation notes



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