CATALOG OF ORIGINAL DESCRIPTIONS: Cromyomma circumtextum Haeckel 1887
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Citation: Cromyomma circumtextum Haeckel 1887Rank: speciesDescribed on page(s) : p.262Type specimens: pl.30, fig.4Type age (chronostrat): [presumably Quaternary though some forms reported from this station appear to be Tertiary]Type locality: LM19Type repository: No information given
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. Size: 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]
References:
Haeckel, E (1887a). 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. gsO
Cromyomma circumtextum compiled by the radiolaria@mikrotax project teamviewed: 5-6-2023
Cromyomma circumtextum Haeckel 1887.jpg
Cromyomma circumtextum Haeckel 1887.jpg
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