Phrenocodon clathrostomium

Classification: rads_cenozoic -> Theoperidae -> Phrenocodon -> Phrenocodon clathrostomium
Sister taxa: P. clathrostomium, P. sp.


Citation: Phrenocodon clathrostomium Haeckel 1887
Rank: species
Basionym: Phrenocodon clathrostomium

Catalog entries: Phrenocodon clathrostomium

Original description: Shell campanulate-conical, with two deep strictures. Length of the three joints = 2: 6: 3, breadth = 3: 10: 14. Cephalis hemispherical, with an oblique curved horn of the same length. Thorax subconical, with polygonal, roundish pores, increasing in size towards the girdle. A perfect fenestrated diaphragm, with irregular, roundish pores of very different sizes, separates the thorax from the abdomen. The latter is composed of three parallel, circular rings, which are connected by fifteen to twenty radial beams. As the middle ring is larger than the two others, the beams between the large quadrangular pores are divergent in the upper, convergent in the lower girdle. Short prolongations of the divergent beams form a coronal around the middle ring (compare fig. 7 profile, fig. 8 from below).


Biogeography and Palaeobiology

Biostratigraphic distribution

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:



Phrenocodon clathrostomium compiled by the radiolaria@mikrotax project team viewed: 12-4-2021

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