Halopappus vahseli Lohmann 1912, this was the type species of Halopappus [ID as M. elegans is my interpretation, but probably not new - JRY 2015]
Michaelsarsia asymmetrica Lohmann (1912) [based on specimen with most link coccoliths missing]
Michaelsarsia falklandica Lohmann (1912)
Michaelsarsia splendens Lohmann (1912)
Syracosphaera corii Schiller (1925)- body coccoliths only but size and shape of coccosphere and arrangement of coccoliths strongly suggest this is Michaelsarsia [my identification, JRY 2015]
NB It is not really possible to tell with any of these early descriptions if the taxon illustrated is M. elegans or M. adriaticus as currently understood but there is no reason to change the established nomenclature.
Distinguishing features: Parent taxon (Michaelsarsia): Coccosphere with apical appendages formed from string of three highly-modified coccoliths, supported by whorl coccoliths This taxon: BCs elliptical; whorl and link coccoliths with wide opening
Morphology: BCs - long elliptical; rim broad; axial structure is prominent mound, about 1/3 width of coccolith. CFCs - spine solid or with narrow central canal. Whorl coccoliths - with wide opening. Link coccoliths - broad, sides well separated.
Lith size: 1.8->2.5µm; Coccosphere size: 10->16µm; Liths per sphere: 45->90 Data source notes: lith length (BCs) from illustrated specimens; csph data from Cros & Fortuño 2003; lith numbers from Yang & Wei 2003, range inferred from single estimate
The morphological data given here can be used on the advanced search page. See also these notes
Geological Range: Last occurrence (top): Extant. Data source: present in the plankton (Young et al. 2003) First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: [JRY rough estimate]
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
(NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Michaelsarsia
References:
Cros, L. & Fortuño, J. -M. (2002). Atlas of northwestern Mediterranean coccolithophores. Scientia Marina. 66: 1-186. gs
Gran, H. H. (1912). Pelagic plant life. In, Murray, J. & Hjort, J. (eds) The Depths of the Ocean. Macmillan, London 307-386. gs
Heimdal, B. R. & Gaarder, K. R. (1981). Coccolithophorids from the northern part of the eastern central Atlantic II. Heterococcolithophorids. “Meteor” Forschungsergebnisse. 33: 37-69. gs
Lohmann, H. (1912). Untersuchungen über das Pflanzen- und Tierleben der Hochsee, zugleich ein Bericht über die biologischen Arbeiten auf der Fahrt der "Deutschland" von Bremerhaven nach Buenos-Aires in der Zeit vom 7. Mai bis 7. September 1911. Veröffentlichungen des Instituts für Meereskunde an der Universität Berlin. 1: 1-92. gs
Reid, F. M. H. (1980). Coccolithophorids of the North Pacific Central Gyre with notes on their vertical and seasonal distribution. Micropaleontology. 26(2): 151-176. gs
Winter, A., Reiss, Z. & Luz, B. (1979). Distribution of living coccolithophore assemblages in the Gulf of Elat ('Aqaba). Marine Micropaleontology. 4: 197-223. gs
Yang, T. -N., Wei, K. & Wu, J. -T. (2012). Marine coccolithophores around Taiwan. Biodiversity Research Center, Academica Sinica, Taipei. 1-96. gs
Young, J. R., Geisen, M., Cros, L., Kleijne, A., Probert, I. & Ostergaard, J. B. (2003). A guide to extant coccolithophore taxonomy. Journal of Nannoplankton Research. S1: 1-132. gs
Michaelsarsia elegans compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 19-4-2025
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