- Type images:
type image: C. icosacanthus
From Suzuki Paleotax db:
1887 Cromyechinus icosacanthus n. sp. Haeckel p. 263, pl. 30, fig. 1
1998 Cromyechinus icosacanthus Haeckel Tan p. 174-175, text-fig. 164
1999 Cromyechinus icosacanthus Haeckel Tan & Chen p. 182, text-fig. 5.90
Catalog entries: Cromyechinus icosacanthus
type image: C. icosacanthusOriginal description: Radial proportion of the three spheres = 1: 2: 6:8. Outer cortical shell very delicate, with very small, regular, circular pores, covered with very numerous bristle-shaped by-spines, half as long as the radius; inner cortical shell with very large, irregular, polygonal pores, three to eight times as broad as the bars. Both medullary shells with regular, circular pores, connected with the former by twenty regularly disposed, very thin bars; these are prolonged outside into twenty very stout, three-sided prismatic main spines, as long as the radius, which arise from the inner cortical shell, and at the distal end are cuspidate.
Geological Range:
Last occurrence (top): Extant. Data source: Lazarus et al. 2015 - "R age group"
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Lazarus et al. 2015 - "R age group"
Plot of occurrence data:
References:
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Cromyechinus icosacanthus compiled by the radiolaria@mikrotax project team viewed: 21-6-2025
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