Catalog entries: Siphonosphaera socialis
Original description: Shell a regular or subregular sphere, bearing only a small number (one to four, commonly two to three) of short and broad cylindrical tubules, irregularly scattered. Between them many small circular or subcircular pores of different sizes, double as broad as their bars. Eight to ten pores in the half meridian of the shell. Tubules three to six times as broad as the pores, about as long as broad, now quite cylindrical, now somewhat dilated at the outer opening (Although the shells and cells of this common species are among the smallest, their colonies are among the largest, often containing more than one hundred social individuals, often enclosed in alveoles.)
Diameter of the shell 40 to 50µm, of the pores 2 to 4µm, of the tubules 15 to 20µm; length of them about the same.
Remarks on original description: very common
Haeckel listed Siphonosphaera socialis under the subgeneric name Merosiphonia, 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:
Siphonosphaera socialis compiled by the radiolaria@mikrotax project team viewed: 29-9-2021
Short stable page link: https://mikrotax.org/radiolaria/index.php?id=205407 Go to Archive.is to create a permanent copy of this page - citation notes