acrosphaera acrosphaera acrosphaera is a radiolarian genus in the collosphaeridae. the genus contains bioluminescent species. it is a genus of colonial radiolarians (as opposed to solitary). acrosphaera illustration of acrosphaera spinosa scientific classification domain: eukaryota clade: diaphoretickes clade: sar phylum: retaria class: polycystinea order: nassellaria family: collozoidae subfamily: collosphaeridae genus: acrosphaera species 5; see text species the following species are recognized: acrosphaera arktios (nigrini, 1970) acrosphaera cyrtodon (haeckel) strelkov & reshetnyak, 1971 acrosphaera lappacea (haeckel) johnson & nigrini, 1980 acrosphaera murrayana (haeckel) hilmers, 1906 acrosphaera spinosa caulet, 1986 acrosphaera trepanata