Nannotax3 - Coccolithophores - Syracosphaera halldalii

Syracosphaera halldalii

Classification: Coccolithophores -> Syracosphaerales -> Syracosphaeraceae -> Syracosphaera -> SY molischii gp -> halldalii type -> Syracosphaera halldalii
Sister taxa: S. halldalii, S. protrudens,

Distinguishing features: BC flange smooth protrusions short or absent

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.JPG

Taxonomy:

Citation: Syracosphaera halldalii Gaarder, in Gaarder & Hasle 1971 ex Jordan, 1994

Rank: Species

Synonyms:

Caneosphaera halldalii
Syracolithus verruca (Lecal-Schlauder 1951) Lecal & Bernheim 1960 var. israela Lecal 1967 - whilst S. verruca was based on an unidentifiable sketch this variety was based on a good quality TEM which clearly is of S. halldalii. However, since a name does not have priority outside the rank for which it is was proposed, the name S. halldalii has priority.

Notes & discussion: This is the type species of Caneosphaera Gaarder in Gaarder & Heimdal 1977, it is normally combined in Syracosphaera following Jordan & Young (1990), but the consistent absence of XCs means reinstatement of the genus Caneosphaera may be justified.

Farinacci & Howe catalog pages: Syracolithus verruca israela * Syracosphaera halldalii [no catalog entry yet]

Distinguishing features: BC flange smooth protrusions short or absent

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.

Search data:

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

The morphological data given here can be used on the advanced search page. See also these notes

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:

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: halldalii type

References:

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.

Jordan, R.W. & Young, J.R., (1990). Proposed changes to the classification system of living Coccolithophorids. International Nannoplankton Association Newsletter, 12(1): 15-18.

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.

Syracosphaera halldalii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-10-2018

Taxon Search:

Advanced Search

Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=1358Go to Archive.is to create a permanent copy of this page - citation notes

Comments (1)

Sort By

Page 1 of 1

Maria Triantaphyllou (Greece)

Combination coccosphere with Calyptrolithina divergens var. tuberosa

TRIANTAPHYLLOU, M.V., DIMIZA, M.D.*, DERMITZAKIS, M.D., 2004. Syracosphaera halldalii and Calyptrolithina divergens var. tuberosa life-cycle association and relevant taxonomic remarks.
Micropaleontology 50 (1): 121-126.
https://www.researchgate.net/profile/Maria_Triantaphyllou/publications?sorting=newest&page=6"""

28th April 2015 9:34pm