Nannotax3 - ntax_cenozoic - Syracosphaera pemmadiscus

Nannotax3 - ntax_cenozoic - Syracosphaera pemmadiscus Nannotax3 - ntax_cenozoic - Syracosphaera pemmadiscus

Syracosphaera pemmadiscus

Classification: ntax_cenozoic -> Syracosphaerales -> Syracosphaeraceae -> Syracosphaera -> SY molischii gp -> borealis type -> Syracosphaera pemmadiscus
Sister taxa: S. borealis, S. strigilis, S. pemmadiscus, S. andruleitii

Chang_2013_Phycologia_Fig1.JPG
Chang_2013_Phycologia_Fig3.JPG
Chang_2013_Phycologia_Fig6.JPG
Chang_2013_Phycologia_Fig5.JPG

Taxonomy:

Citation: Syracosphaera pemmadiscus Chang, 2013

Rank: Species

Taxonomic discussion: Described in - Chang, F.H., 2013. Syracosphaera pemmadiscus sp. nov. (Prymnesiophyceae), an extant coccolithophore from the southwest Pacific Ocean near New Zealand. Phycologia, 52(6): 618-624.

Distinguishing features:
Parent taxon (borealis type): XCs elliptical discs, with a narrow rim, central part without conical depression. CFCs not differentiated.
This taxon: BCs with narrow, fluted, distal flange; XCs smooth elliptical discs with parenthesis shaped openings

Farinacci & Howe catalog pages: S. pemmadiscus *

Morphology:

Inclusion of this species in the borealis type follows Chang (2013) and is based on the similarity of the exothecal planoliths to those of S. borealis and S. hirsuta, and absence of specialised circum flagellar cocoliths (CFCs).
Chang (2013) describes the coccosphere as having two types of exothecal coccoliths - curved planoliths as seen at top right of the holotype coccosphere and muroliths as seen at bottom left. The putative exothecal murolith may, however, be a damaged body coccolith.

Size:

Coccospheres 7-8µm; BCs 1.4-1.8 µm long

Ecology & Biogeography

Only records are of two cells in SW Pacific

Search data:

LITHS: murolith, placolith, elliptical, CA: ca_disjunct, grill, plate,
CSPH: equant, XC, CROSS-POLARS: R-prominent, T-prominent,

Lith size: 1.4->1.8µm; Coccosphere size: 7->8µm; Liths per sphere: 50->60
Data source notes: csph & lith length (BCs) from OD

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 (Chang 2013)
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" 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: borealis type

References:

Chang, F. H. (2013). Syracosphaera pemmadiscus sp. nov. (Prymnesiophyceae), an extant coccolithophore from the southwest Pacific Ocean near New Zealand. Phycologia. 52(6): 618-624. gs

Syracosphaera pemmadiscus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-3-2023

Taxon Search:

Advanced Search

AphiaID: 839858 Nomenclatural data on WoRMS
Short stables page link: https://mikrotax.org/Nannotax3/index.php?id=1384 Go to Archive.is to create a permanent copy of this page - citation notes

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