Zeugrhabdotus diplogrammus
Classification: Mesozoic -> Eiffellithales -> Chiastozygaceae -> Zeugrhabdotus -> Zeugrhabdotus diplogrammus
Sister taxa: Z. acanthus, Z. angelozziae, Z. bicrescenticus, Z. biperforatus, Z. blowii, Z. burolletii, Z. burwellensis, Z. clarus, Z. cooperi, Z. diplogrammus, Z. elegans, Z. embergeri, Z. erectus, Z. fissus, Z. fluxus, Z. howei, Z. kerguelenensis, Z. moulladei, Z. noeliae, Z. petrizzoae, Z. praesigmoides, Z. reticulatus, Z. scutula, Z. sigmoides, Z. simplex, Z. sisyphus, Z. streetiae, Z. trivectis, Z. xenotus, Z. sp.,
Distinguishing features: Zeugrhabdotus with a bipartite transverse bar which is bright in XPL at the 0° position, darkest at 60°, but which is generally visible throughout rotation. Unicyclic rim image in XPL.
WindandWise1977-DSDP36-pl55-7.JPG
Burnett1998-6-02-13.jpg
Bown_etal_1998 EK 5-07-28.jpg
Bown_in_Kennedy-2000_fig31-c^.JPG
Bown2005-ODP198 Pl02-01.jpg
Bown_etal_1998 EK 5-07-29.jpg
Bown_etal_1998 EK 5-07-30.jpg
Bown_in_Kennedy-2000_fig31-d^.JPG
BownandConcheyro-2004_1-20.jpg
CalcPal-zste_com.jpg
CalcPal-zste_sem.jpg
Cepek78pl3-10.JPG
Gale96f6-05e.JPG
HardasMutterlose 2008 pl1-15.JPG
Mutterlose1992_ODP123_pl5-4.JPG
Mutterlose1992_ODP123_pl5-5.JPG
Mutterlose92pl5-04.JPG
Mutterlose92pl5-05.JPG
RothTh72pl11 1.JPG
RothTh72pl11 2-5.JPG
Thibault 2010 pl2-fig11.JPG
Thibault 2010 pl2-fig12.JPG
TypeFig Zeugrhabdotus diplogrammus.jpg
Taxonomy:
Citation: Zeugrhabdotus diplogrammus (Deflandre in Deflandre & Fert, 1954) Burnett in Gale et al., 1996Rank: SpeciesBasionym: Zygolithus diplogrammus Deflandre in Deflandre & Fert, 1954Synonyms:
- Glaukolithus diplogrammus (Deflandre) Reinhardt, 1964
- Zygolithus stenopus Stover, 1966 (according to Verbeek 1977)
- Zygodiscus diplogrammus (Deflandre) Gartner 1967
Farinacci & Howe catalog pages: Zygolithus diplogrammus * Zygolithus stenopus *
Distinguishing features: Zeugrhabdotus with a bipartite transverse bar which is bright in XPL at the 0° position, darkest at 60°, but which is generally visible throughout rotation. Unicyclic rim image in XPL.
Morphology remarks: Z. bicrescenticus is very simlar but smaller and with a narrow central area. [my interpretation - JRY 2017]
Geological Range:
Notes: LAD in S England in Santonian, UC12 (Burnett 1998)
Last occurrence (top): within Campanian Stage (72.05-83.64Ma, top in Campanian stage). Data source: Burnett 1998
First occurrence (base): within Early Valanginian Substage (136.41-139.39Ma, base in Valanginian stage). Data source: Bown et al. 1998
Plot of occurrence data:
- Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
- Triangles indicate an event for which a precise placement has been suggested
- Histogram - Neptune occurrence data from DSDP and ODP proceedings. Interpret with caution & read these notes
- Taxon plotted: Zeugrhabdotus diplogrammus, synonyms included - Glaukolithus diplogrammus; Zeugrhabdotus diplogrammus; Zygodiscus diplogrammus; Zygolithus diplogrammus; space-time plot ::
Samples map :: Parent: Zeugrhabdotus
References:Bown, P.R.; Rutledge, D.C.; Crux, J.A. & Gallagher, L.T., (1998). Early Cretaceous. In: Bown, P.R. (Editor), Calcareous nannofossil biostratigraphy. British Micropalaeontological Society Publication Series. Chapman & Hall, pp. 86-131.
Burnett, J.A., (1998). Upper Cretaceous. In: Bown, P.R. (Editor), Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publications Series. Chapman & Hall, London, pp. 132-199.
Deflandre, G. & Fert, C., (1954). Observations sur les coccolithophoridés actuels et fossiles en microscopie ordinaire et électronique. Annales de Paléontologie, 40: 115-176.
Gale, A.S.; Kennedy, W.J.; Burnett, J.A.; Caron, M. & Kidd, B.E., (1996). The Late Albian to Early Cenomanian succession at Mont Risou, near Rosans (Drôme, SE France): an integrated study (ammonites, inoceramids, planktonic foraminifera, nannofossils, oxygen and carbon isotopes). Cretaceous Research, 17: 515-606.
Verbeek, J.W., (1977). Calcareous nannoplankton biostratigraphy of Middle and Upper Cretaceous deposits in Tunisia, southern Spain and France. Utrecht Micropaleontological Bulletins, 16: 1-157.
