Jimenezberrocosoia


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

Distinguishing features: Elliptical with slits between shield elements and axial cross


Daughter taxa: (blue => in age window 0-800Ma)
Small to very small (<3µm), central area very narrow 
Medium sized (4-6µm) with narrow central area and birefringent cross. Short-axis crossbar brighter than long-axis crossbar.

Taxonomy:

Citation: Jimenezberrocosoia Lees & Bown 2016
Rank: Genus
Type species: Jimenezberrocosoia birchiae Lees & Bown 2016
Notes & discussion: This genus has central-area features similar to certain species of Sollasites Black, 1967, but is distinct from Sollasites because of the distinctive rim slits. [Lees & Bown 2016]

Farinacci & Howe catalog pages: Jimenezberrocosoia

Distinguishing features: Elliptical with slits between shield elements and axial cross


Morphology remarks:

Biscutacean placolith coccoliths with slits between the elements of the distal shield. The narrow to moderately wide, open, elliptical central-areas are spanned by distinct structures, comprising an axial cross and accessory bars. The proximal shield comprises a rim of elongated, widely-spaced elements radiating from the central tube-cycle. [Lees & Bown 2016]

Search data:
TagsLITHS: placolith, elliptical, CA: concentric-ring(s), cross-axial, V-UNITS: V-prominent, R-UNITS: R-prominent, DETAILS: ca_disjunct, rim-bicyclic,
MetricsLith size: 2->6µm;
Sources: 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): at top of Coniacian Stage (100% up, 86.3Ma, in Coniacian stage). Data source: Total of range of species in this database
First occurrence (base): in lower part of Aptian Stage (25% up, 123Ma, in Aptian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Lees, J. A. & Bown, P. R. (2016). New and intriguing calcareous nannofossils from the Turonian (Upper Cretaceous) of Tanzania. Journal of Nannoplankton Research. 36(1): 83-95. gs :: view :: open


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Jimenezberrocosoia compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 9-7-2020

Taxon Search:
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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10535 Go to Archive.is to create a permanent copy of this page - citation notes



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