|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Radiolaria - Archaeospicularia - Palaeospiculidae
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|M.-Z. Won and W. J. Iams 2002||A spherical skeleton constructed on a point-centered four-rayed spicule; three to six spinules on each ray, commonly arising at two positions; proximal primary spinules very large and distal primary spinules not well developed; second-order spinules present on the primary spinules, third-order spinules on the second-order spinules present or absent; spinules generally radially arranged; densely distributed thorns or spinulets on distal part of each ray; spinule development giving rise to roughly spherical shell.|