radiolaria - rads_cat - Archicircus sexangularis radiolaria - rads_cat - Archicircus sexangularis

CATALOG OF ORIGINAL DESCRIPTIONS: Archicircus sexangularis 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 -> Archicircus -> Archicircus sexangularis
Other pages this level: A. duodenus, A. ellipsis, A. hertwigii, A. hexacanthus, A. monopylus, A. monostephus, A. ovalis, A. primordialis, A. princeps, A. quadratus, A. rhombus, A. sexangularis, A. triglyphus

Archicircus sexangularis

Citation: Archicircus sexangularis Haeckel 1887
taxonomic rank: species
Described on page(s) : p.943
Type specimens: pl.81, fig.12
Type age (chronostrat): [presumably Quaternary though some forms reported from this station appear to be Tertiary]
Type locality: LM49
Type repository: No information given

Current identification:

Original Description

Gate hexagonal or subcircular. Ring hexagonal, with two sharp prominent edges and six pairs of divergent spines, about as long as the radius of the gate, and arising from the two edges at the six corners. The two apical and the two basal spines are simple and conical, whilst the eight other spines, arising in pairs from the two dorsal and the two ventral corners, are slightly forked.

Diameter of the gate 0.06 to 0.08; thickness of the ring 0.01 to 0.015

Editors' Notes
Haeckel listed Archicircus sexangularis under the subgeneric name Archistephus, but did not include the subgeneric name in the species name.
Questionably synonymized with Lithocircus reticulatus.[comment from RadWorld database]


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 years 1873-1876. 18: 1-1803. gs O


Archicircus sexangularis compiled by the radiolaria@mikrotax project team viewed: 20-5-2024

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