Lithoptychius pileatus
Ancestry: Coccolithophores -> Discoasterales -> Fasciculithaceae -> Lithoptychius -> Lithoptychius pileatus
Sister taxa: L. billii, L. janii, L. pileatus, L. ulii, L. varolii, L. vertebratoides, L. sp.,
Short diagnosis: Cylindrical column that broadens distally and a wide, disc-like apical cycle that is crystallographically distinct.
Steurbaut_and_Strakos2008_plIII-fig23.JPG
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Bukry 1973 DSDP20_pl1-fig7.JPG
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Bukry 1973 DSDP20_pl2-fig2.JPG
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Okada_and_Th1979_pl17-fig3.JPG
Steurbaut_and_Strakos2008_plIII-fig24.JPG
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Taxonomy:
Citation: Lithoptychius pileatus (Bukry, 1973) Aubry in Aubry et al. 2011Rank: SpeciesBasionym: Fasciculithus pileatus Bukry, 1973Notes & discussion: Distinguishing this taxon from L. janii is quite straightforward, but it is clearly similar and may prove to be conspecific.
One of the specimens included by Bukry (1973) in his original description (his plate 2 fig 1) is better placed in F. janii, and hence the two species have been confused in the literature - see Steurbaut & Sztrakos (2008), Monechi et al. (2012).
Farinacci & Howe catalog pages: Fasciculithus pileatus * Lithoptychius pileatus *
Short diagnosis: Cylindrical column that broadens distally and a wide, disc-like apical cycle that is crystallographically distinct.
Geological Range:
Last occurrence (top): in mid part of NP6 zone (50% up, 59.3Ma, in Thanetian stage). Data source: Varol, 1989, fig. 12.4
First occurrence (base): near top of NP4 zone (90% up, 61.7Ma, in Danian stage). Data source: Varol, 1989, fig. 12.4; Monechi et al. 2013, fig 6
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: Lithoptychius pileatus, synonyms included - Fasciculithus pileatus; Parent: Lithoptychius
References:Aubry, M.P.; Bord, D. & Rodriguez, O., (2011). New taxa of the Order Discoasterales Hay 1977. Micropaleontology, 57(3): 269-287.
Bukry, D., (1973). Phytoplankton stratigraphy, Deep Sea Drilling Project Leg 20, Western Pacific Ocean. Initial Reports of the Deep Sea Drilling Project, 20: 307-317.
Monechi, S.; Reale, V.; Bernaola, G. & Balestra, B., (2013). The Danian/Selandian boundary at Site 1262 (South Atlantic) and in the Tethyan region: Biomagnetostratigraphy, evolutionary trends in fasciculiths and environmental effects of the Latest Danian Event. Marine Micropaleontology, 98(1): 28-40.
Monechi, S.; Reale, V.; Bernaola, G. & Balestra, B., (2012). Taxonomic review of early Paleocene fasciculiths. Micropaleontology, 58(4): 351-365.
Perch-Nielsen, K., (1985). Cenozoic calcareous nannofossils. In: Bolli, H.M., Saunders, J.B. and Perch-Nielsen, K. (Editors), Plankton Stratigraphy. Cambridge University Press, Cambridge, pp. 427-555.
Varol, O., (1989). Palaeocene calcareous nannofossil biostratigraphy. In: Crux, J.A. and van Heck, S.E. (Editors), Nannofossils and their applications. Ellis Horwood, Chichester, pp. 265-310.
Nannotax3 - Coccolithophores - Lithoptychius pileatus by: Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 29-6-2017
