Catalog entries: Tetraspyris tetracorethra
Original description: Shell campanulate, tuberculate, with deep sagittal stricture and irregular polygonal pores; two pairs of larger pores at the flattened occipital face (fig. 20). Basal plate with four large collar pores. Apical horn very long, thirty to forty times as long as the shell, slender three-sided prismatic, straight, at the distal end irregularly branched, besom-shaped. Four basal feet half as thick as the horn, eight to twelve times as long as the shell, bristle-shaped, irregularly curved and branched, divergent, at the distal end besom-shaped. Central capsule very large; the enclosed small campanulate part sends out through the four collar pores four very long club-shaped basal lobes, half as long as the feet; each lobe contains a large oil-globule (fig. 19).
Shell 0.036 diameter; horn 1 to 1.5 mm long, feet 0.3 to 0.4 long.
Remarks on original description: Haeckel listed Tetraspyris tetracorethra under the subgeneric name Tetracorethra, but did not include the subgeneric name in the species name.
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:
Tetracorethra tetracorethra compiled by the radiolaria@mikrotax project team viewed: 5-6-2023
Short stables page link: https://mikrotax.org/radiolaria/index.php?id=205730 Go to Archive.is to create a permanent copy of this page - citation notes