Nannotax3 - ntax_mesozoic

Nannotax3 - ntax_mesozoic - Seribiscutum Nannotax3 - ntax_mesozoic - Seribiscutum

Seribiscutum

Classification: ntax_mesozoic -> Podorhabdales -> Biscutaceae -> Seribiscutum
Sister taxa: Biscutum, Discorhabdus, Similiscutum ⟩⟨ Boletuvelum, Chiastella, Crucibiscutum, Gaarderella, Gephyrobiscutum, Helicorhabdus, Jimenezberrocosoia, Seribiscutum, Sollasites

Distinguishing features:
Parent taxon (Biscutaceae): Regular placoliths; rim broad, central area relatively narrow, with variable central structures.
The distal shield is formed from V-units and the proximal shield and tube cycle are formed from R-units.
This taxon: Elliptical with central-area spanned by broad platelets.

Daughter taxa (time control age-window is: 0-800Ma)
				Seribiscutum bijugum Small (3-4 µm) with relatively narrow central-area spanned by two parallel tranverse bars/platelets.
				Seribiscutum primitivum Medium size (5-9µm); central-area with ca 4 broad platelets that zig-zag across the central area. Weakly bicyclic.
				Seribiscutum sp. Specimens not identified to species level

JRYSEM-287-21.JPG

Taxonomy:

Citation: Seribiscutum Filewicz et al. in Wise & Wind, 1977

Rank: Genus

Type species: Seribiscutum bijugum Filewicz et al. in Wise and Wind, 1977.

Farinacci & Howe catalog pages: Seribiscutum *

Search data:

LITHS: placolith, elliptical, CA: ca_disjunct, plate, CROSS-POLARS: V-prominent,

Lith size: 3->9µm;
Data source notes: size range of included species

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

Geological Range:
Last occurrence (top): in upper part of Campanian Stage (67% up, 75.9Ma, in Campanian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Aptian Stage (0% up, 126.3Ma, in Aptian stage). Data source: Total of range of species in this database

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
Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Biscutaceae

References:

Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Lower Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 86-131. gs O

Wise, S. W. & Wind, F. H. (1977). Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 36 drilling on the Falkland Plateau, south-west Atlantic sector of the Southern Ocean. Initial Reports of the Deep Sea Drilling Project. 36(269-491): -. gs O

Seribiscutum compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 31-3-2023

Taxon Search:

Advanced Search

AphiaID: 602074 Nomenclatural data on WoRMS
Short stables page link: https://mikrotax.org/Nannotax3/index.php?id=11080 Go to Archive.is to create a permanent copy of this page - citation notes

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