radiolaria - rads_cenozoic - Larcopyle frakesi radiolaria - rads_cenozoic - Larcopyle frakesi

Larcopyle frakesi


Classification: rads_cenozoic -> Pyloniidae -> Larcopyle -> Larcopyle frakesi
Sister taxa: L. augusti, L. buetschlii, L. eccentricanoides, L. eccentricum, L. frakesi, L. hayesi, L. labyrinthusa, L. molle, L. nebulum, L. peregrinator, L. polyacantha, L. pulchella, L. pylomaticus, L. titan, L. weddellium, L. sp.

Taxonomy

Citation: Larcopyle frakesi (Chen) Lazarus et al. 2005
taxonomic rank: species
Basionym: Prunopyle frakesi Chen 1975
Synonyms:
1975 Prunopyle frakesi - Chen pl. 10, figs. 1-3

Catalog entries: Prunopyle frakesi

Original description: Cortical shell prune-shaped, thick-walled; pores small, circular, tubelike, of uniform size, evenly distributed. Medullary shell consisting of a spiral, dense, spongy disk (plate 1, figures 4, 6) at the center and a loose meshwork (plate 1, figure 5) at the margin. Pylome small circular, and surrounded by 7-12 conical spines of variable lengths.
(Based on 35 specimens from 274-21-3, 54-64cm.; 274-21, CC; 274-22, CC; and 274-23, CC.)
Major axis of shell 270-342ยต. Minor axis of shell 198-297.Ratio of major axis to minor axis 1.12-1.30.
Remarks on original description: Chen described this species twice - in IRDSDP vol 28 and Micropaleontology part 20/4. Both publications have cover dates of 1974 but actually were published in 1975 and the Micropaleontology volume is generally considered to be the valid publication. The images are typically the same in both, but the text is slighlty different. [JRY 2023]

Description

Biogeography and Palaeobiology


Similar species

frakesi

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Paleogene Period (23.03-66.04Ma, top in Chattian stage). Data source: Lazarus et al. 2015 - "P age group"
First occurrence (base): within Paleogene Period (23.03-66.04Ma, base in Danian stage). Data source: Lazarus et al. 2015 - "P age group"

Plot of occurrence data:

References:

Missing or ambiguous references: Chen 1975;


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Larcopyle frakesi compiled by the radiolaria@mikrotax project team viewed: 27-2-2024

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Short stable page link: https://mikrotax.org/radiolaria/index.php?id=204401 Go to Archive.is to create a permanent copy of this page - citation notes



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