Lanternithus
Classification: ntax_cenozoic -> Holococcoliths -> fossil holococcoliths -> Lanternithus
Sister taxa: Clathrolithus, Corannulus, Daktylethra, Holodiscolithus, Lanternithus, Multipartis, Octolithus, Orthozygus, Quadrilateris, Semihololithus, Varolia, Youngilithus, Zygrhablithus, Unidentified fossil holococcoliths
Daughter taxa (time control age-window is: 0-800Ma) |
 |  |  |  | Lanternithus arcanus
Medium sized holococcolith comprising several distinct crystallographic blocks that change appearance on rotation in XPL. At 0° six blocks are visible, four major quadrants, alternating dark and light, delineated by axial sutures, and one small block at each end. At 5° the four quadrants are bright and a small pore is visible in the centre. At 45° the coccolith is bright and crossed by diagonal extinction lines.
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 |  |  |  | Lanternithus duocavus
Small holococccolith with small blocks at either end and two relatively large longitundinal central area holes.
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| | | | Lanternithus jawzii
Similar to L. duocavus but without perforations in the plates
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 |  |  |  | Lanternithus minutus
Rectangular holococcoliths with distinct lateral and end rim blocks and a large central pore. In side view it has a box-like appearance that tapers slightly to one end where it is capped by a cover.
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 |  |  |  | Lanternithus procerus
Medium to large sized holococcolith seen in side view and comprising a basal coccolith formed from two plates, the upper of which extends distally to form a tall process that tapers to a termination capped by a distal cover. The spine is taller than the maximum width of the coccolith.
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 |  |  |  | Lanternithus simplex
Medium sized holococcolith comprising several distinct crystallographic blocks. At 0° four blocks are visible, four major quadrants demarcated by dark extinction lines. There is a small pore visible at the centre of the coccolith.
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 |  |  |  | Lanternithus unicavus
Small, elliptical holococcoliths with two small blocks at either end of the lith and a circular central hole or depression, which is dark in XPL. In XPL, the blocks are relatively dark when the coccolith is orientated at 0° and brightest at 45°.
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 |  | | | Munarinus emrei
Small holoccolith with 4-6 rim blocks surrounding a central block
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 |  |  |  | Lanternithus sp.
Specimens which cannot be assigned to any established species
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Taxonomy:
Citation: Lanternithus Stradner, 1962Rank: GenusType species: Lanternithus minutus Stradner, 1962Taxonomic discussion: Similar species are placed in he genus Munarinus in the Cretaceous
Distinguishing features: Cavate holoccoliths with distinct crystallographic blocks.
Farinacci & Howe catalog pages: Lanternithus *
Search data:
| Tags | LITHS: holococcolith, elliptical, hollow, CROSS-POLARS: R-prominent, |
| Metrics | Lith size: 3->7µm; Segments: 5->7; |
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 Rupelian Stage (74% up, 29.6Ma, in Rupelian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Danian Stage (0% up, 66Ma, in Danian 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: fossil holococcoliths
References:
Perch-Nielsen, K. (1985a). Cenozoic calcareous nannofossils. In, Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge 427-555. gs
Stradner, H. (1962). Über neue und wenig bekannte Nannofossilien aus Kreide und Alttertiär. Verhandlungen der Geologischen Bundesanstalt (Wien). 2: 363-377. gs V O
