JRYSEM-305-062p.JPG
Young_etal_2003_126-43.JPG
Young_etal_2003_118-61.JPG
Young_etal_2003_126-44.JPG
JRY-IODP359-P29-544.JPG
JRYSEM-217-59.JPG
JRYSEM-305-062.JPG
JRYSEM-318-092.JPG
Konno_and_Jordanpl6-01.JPG
Konno_and_Jordanpl6-02.JPG
Konno_and_Jordanpl6-03.JPG
Konno_and_Jordanpl6-04.JPG
Konno_and_Jordanpl6-05.JPG
McGrane_2014_JNR_1.JPG
McGrane_2014_JNR_2.JPGTaxonomy:
Distinguishing features: BC flange smooth protrusions short or absent
Farinacci & Howe catalog pages: Syracosphaera halldalii [no catalog entry yet], Syracolithus verruca israela *
Morphology remarks: BCs - with narrow distal flange; flanges well-separated by vertical sided tube; laths well-separated; low axial ridge formed of one or two laths. Short teeth protruding over central area from distal flange occur in some specimens. CFCs - with tall spine, quadrate section, blunt end.
Size: Coccospheres 5-20 µm; BCs 2-4 µm.
Biology & life-cycles: A combination coccosphere with the holococcolith Calyptrolithina divergens forma tuberosa was recorded by Triantaphyllou et al. 2004. Only a single coccosphere was observed, but it is well preserved and does not look to be an artefact, so it is likely this combination will be confirmed.
| Tags | LITHS: murolith, placolith, elliptical, RIM: flange-distal, outer wall non-imbricate, flange-proximal, rim-narrow, spine(s), CA: grill, axial ridge or plate, CSPH: ellipsoidal, spherical, CFC, CFC+process, polymorphic, R-UNITS: rim, T-UNITS: c-str, DETAILS: ca_disjunct, |
| Metrics | Lith size: 2->3.5µm; Coccosphere size: 9->12µm; Liths per sphere: 40->80 Sources: lith length (BCs) from illustrated specimens and Cros & Fotuño 2002; csph data from Cros & Fortuño 2003; lith numbers from Yang & Wei 2003, range of estimates |
See also: Calyptrolithina divergens - possible holococcolith stage;
Geological Range:
Last occurrence (top): Extant Data source: present in the plankton (Young et al. 2003)
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in stage). Data source: [JRY rough estimate]
Plot of occurrence data:
Jordan, R. W. & Green, J. C. (1994). A check-list of the extant haptophyta of the world. Journal of the Marine Biological Association of the United Kingdom. 74: 149-174. gs Jordan, R. W. & Young, J. R. (1990). Proposed changes to the classification system of living Coccolithophorids. INA Newsletter. 12(1): 15-18. gs Konno, S. & Jordan, R. W. (2006). Lagoon coccolithophorids from the Republic of Palau, NW Equatorial Pacific. Journal of Nannoplankton Research. 28(2): 95-110. gs McGrane, P. B. (2014). Observation of an exothecal coccolith associated with Syracosphaera halldalii: evidence for dithecatism?. Journal of Nannoplankton Research. 34(special): 47-48. gs Triantaphyllou, M., Dimiza, M. D. & Dermitzakis, M. (2004). Syracosphaera halldalii and Calyptrolithina divergens var. tuberosa life-cycle association and relevant taxonomic remarks. Micropaleontology. 50(suppl. 1): 121-126. 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, Special Issue. 1: 1-132. gsReferences:
 |
Syracosphaera halldalii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-10-2019
Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=1358 Go to Archive.is to create a permanent copy of this page - citation notes |