Nannotax3 - ntax_cenozoic - Vexillarius iaculifer Nannotax3 - ntax_cenozoic - Vexillarius iaculifer

Vexillarius iaculifer


Classification: ntax_cenozoic -> Coccolith families inc sed -> Papposphaeraceae -> Vexillarius -> Vexillarius iaculifer
Sister taxa: V. cancellifer, V. cereus, V. iaculifer, V. sp. 1, V. acerviphora, V. sp.

Taxonomy:

Citation: Vexillarius iaculifer Andruleit & Jordan 2017
taxonomic rank: Species

Distinguishing features:
Parent taxon (Vexillarius): Coccosphere dimorphic. CFCs (and some dispersed liths) with quadrate central process supported by transverse bar.
BCs open or with concetric/longitudinal bars.

This taxon: Process lozenge-shaped; maximum width about half-way up process.

Farinacci & Howe catalog pages: V. iaculifer *


Morphology:

Coccosphere shape unknown, collapsed specimens spherical–subspherical in outline, 5.3–6.4 µm in diameter (excluding appendages). Coccosphere dimorphic, monothecate, bearing 50–70 ordinary (body) coccoliths and 18–22 tubular coccoliths. Body coccoliths elliptical, 0.8–0.9 µm x 1.0–1.5 µm, and 0.3–0.4 µm in height, flaring outer wall elements, and inner cycle of much shorter wall elements. Central area apparently open.
Tubular coccoliths identical to body coccoliths, but with central bar across short axis, supporting quadrangular appendage, 1.9–5.1 µm long. Basal portion of process narrow (0.2–0.3 µm wide), middle portion slightly inflated (0.5 µm), distal portion tapered (0.1 µm). Coccoliths with very long tapered processes inflated in the basal portion. Process wall comprising single row of brick-like elements, ranging in shape from square (only near the base) to rectangular. [from Andruleit & Jordan 2017, slightly edited]


Ecology & Biogeography

Depp photic, rare

Search data:
LITHS: murolith, elliptical, CA: ca_disjunct, vacant, process, closed,
Lith size: 1->1.5µm; Coccosphere size: 5->7µm; Liths per sphere: 70->90
Data source notes: original description - lith size=BC length. Csph size excludes processes.
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: original description
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source: original description

Plot of occurrence data:

References:

Andruleit, H. & Jordan, R. W. (2017). Two new species of Vexillarius (Prymnesiophyceae) from the eastern Indian Ocean. Phycologia. 56(5): 510-516. gs

Norris, R. E. (1971). Extant calcareous nannoplankton from the Indian Ocean. In, Farinacci, A. (ed.) Proceedings of the Second Planktonic Conference Roma 1970. E. J. Brill, Leiden 899-910. gs


nannotaxlogo400px

Vexillarius iaculifer compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 3-3-2024

Taxon Search:
Advanced Search

Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1489 Go to Archive.is to create a permanent copy of this page - citation notes
nannotaxlogo400px

Nannotax is being sponsored through 2024 by Woodside Energy and Shell USA


Add Comment

* Required information
Captcha Image
Powered by Commentics

Comments

No comments yet. Be the first!