Fig. 4.

Schematic morpho‐molecular classification of Acantharia based on ribosomal genes (18S and 28S rDNA) from Decelle et al. (2012a).

A. Phylogeny showing molecular clades, taxonomic suborders and environmental clades. Non‐supported nodes are reported by a surrounded question mark.

B. Corresponding extent of the morpho‐molecular framework and main morphological features (including the presence and type of symbionts reported).

C. Scanning electron microscopy illustrations of typical strontium sulfate structures found in three acantharian clades. All scale bars are 50 μm. Images courtesy of Karine Leblanc (CNRS).