radiolaria - rads_cat - Cromyomma circumtextum radiolaria - rads_cat - Cromyomma circumtextum

CATALOG OF ORIGINAL DESCRIPTIONS: Cromyomma circumtextum 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 -> C -> Cromyomma -> Cromyomma circumtextum
Other pages this level: C. circumtextum, C. macroporum, C. mucronatum, C. perplexum, C. perspicuum, C. riedeli, C. spinulosa, C. tuberculata, C. villosum

Cromyomma circumtextum

Citation: Cromyomma circumtextum Haeckel 1887
taxonomic rank: species
Described on page(s) : p.262
Type specimens: pl.30, fig.4
Type age (chronostrat): [presumably Quaternary though some forms reported from this station appear to be Tertiary]
Type locality: LM19
Type repository: No information given

Current identification/main database link: Cromyomma circumtextum Haeckel 1887

Original Description

Radial proportion of the four spheres = 1: 2: 5: 7. Outer cortical shell very delicate and thin walled, with thread-like bars and large, irregular, polygonal meshes (larger than the innermost shell); inner cortical shell also with irregular, polygonal pores, three to nine times as broad as the thick bars. Both medullary shells with subregular, circular pores (the outer three times as broad as the inner). Radial spines twelve to twenty, three-sided prismatic, stout, piercing the three outer shells, inserted on the innermost; their outer part pyramidal, half as long as the radius.

Diameter of the four shells - (A) 0.22, (B) 0.15, (C) 0.07, (D) 0.03; meshes of the outer shell 0.02 to 0.04; length of the outer spines 0.05.

Editors' Notes
Haeckel listed Cromyomma circumtextum under the subgeneric name Cromyommura, but did not include the subgeneric name in the species name.[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


Cromyomma circumtextum compiled by the radiolaria@mikrotax project team viewed: 21-5-2024

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