Poritectolithus
Classification: ntax_cenozoic -> Holococcoliths -> bridged -> Poritectolithus
Sister taxa: Corisphaera, Helladosphaera, Homozygosphaera, Poritectolithus, S. anthos HOL
Daughter taxa (time control age-window is: 0-800Ma) |
 |  |  |  | Poritectolithus maximus
BCs tube about 4 crystallites high, with basal flange and row of pores above; convex strings of small crystallites form a high bridge
CFCs tube raised at sides; well developed leaf.
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 |  |  |  | Poritectolithus poritectus
BCs tube about 4 crystallites high with basal flange. Bridge modified into long mound ex.
CFCs tube raised at sides; well-developed leaf.
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 |  |  |  | Poritectolithus tyronus
Like P. poritectum but less convex and CFC leaf terminated in narrow spinelet (distinction of these two species may prove unsound).
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| | | | Poritectolithus sp.
Specimens which cannot be assigned to established species
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Taxonomy:
Citation: Poritectolithus Kleijne, 1991Rank: GenusType species: Helladosphaera poritectum Heimdal, in Heimdal and Gaarder, 1980
Distinguishing features: Dimorphic; BCs with bridge formed of sub-parallel strings of crystallites.
CFCs bridge narrower and extended into leaf (helladoliths)
Farinacci & Howe catalog pages: Poritectolithus *
Search data:
| Tags | LITHS: holococcolith, elliptical, hollow, CA: bar,
CSPH: equant, elongated, CFC, CROSS-POLARS: R-prominent, T-prominent, |
| Metrics | Lith size: 1.2->2.8µm; Coccosphere size: 8->20µm; |
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: Total of range of species in this database
First occurrence (base): at top of No known fossil record modern (100% up, 0Ma, in "Holocene" 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: bridged
References:
Kleijne, A. (1991). Holococcolithophorids from the Indian Ocean, Red Sea, Mediterranean Sea and North Atlantic Ocean. Marine Micropaleontology. 17: 1-76. gs
