CATALOG OF ORIGINAL DESCRIPTIONS: Amphicyclia chronometra Haeckel 1887

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.

Higher levels: rads_cat -> A -> Amphicyclia -> Amphicyclia chronometra
Other pages this level: A. amphistyla, A. bispina, A. chronometra, A. pachydiscus, A. pentaspina, A. quadrispina, A. trispina

Amphicyclia chronometra

Citation: Amphicyclia chronometra Haeckel 1887
Rank: species
Type specimens: pl.38, fig.1
Type repository: No information given
Described on page(s) : p.463
Family (traditional): Coccodiscidae
Family (modern): Coccodiscidae

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Current identification:

Original Description
Phacoid shell three times as broad as the outer and nine times as broad as the inner medullary shell, surrounded by two broad chambered rings, which are divided into irregular chambers by fifty to sixty radial beams of different distance. Margin of the disk thorny, lacerated. Pores irregular, roundish; twelve to sixteen on the radius of the phacoid shell, two to three on the breadth of each ring. The two opposite marginal spines strong, prismatic, with prominent edges, about as long as the diameter of the disk.

Diameter of the disk (with two rings) 240µm, of the phacoid shell 150µm, outer medullary shell 50µm, inner 17µm.

Editors' Notes
[Stratigraphic information for LM21 from Riedel, 1959, p.287]


Haeckel, E (1887). Report on the Radiolaria collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the year 1873-1876, Zoology. 18: 1-1803. gs

Riedel, W. R. (1959). Oligocene and Lower Miocene Radiolaria in tropical Pacific sediments. Micropaleontology. 5(3): 285-302. gs


Amphicyclia chronometra compiled by the radiolaria@mikrotax project team viewed: 17-5-2021

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