Distinguishing features: Process lozenge-shaped; maximum width about half-way up process.Type images:
Farinacci & Howe catalog pages: Vexillarius iaculifer
Morphology remarks: 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
|Tags||LITHS: murolith, elliptical, RIM: rim-narrow, CA: bar-transverse, vacant, process, closed, PROCESS: spine, tapers in both directions, |
CSPH: not known, EqC, EqC+process, DETAILS: ca_disjunct,
|Metrics||Lith size: 1->1.5µm; Coccosphere size: 5->7µm; Liths per sphere: 70->90|
Sources: original description - lith size=BC length. Csph size excludes processes.
Last occurrence (top): Extant Data source: original description
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in stage). Data source: original description
Plot of occurrence data:
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 1971. E. J. Brill, Leiden 899-910. gs
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 1971. E. J. Brill, Leiden 899-910. gs
Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=1489 Go to Archive.is to create a permanent copy of this page - citation notes