Synonym: Harsa Carter [replaced name]
Full reference: E. S. Carter. 2007. New names for two Triassic radiolarian genera from the Queen Charlotte Islands: Ellisus replaces Harsa Carter 1991 non Marcus 1951; Serilla replaces Risella Carter 1993 non Gray 1840 (1847). Micropaleontology 53(1-2):104
Parent taxon: Entactinaria according to E. S. Carter 2007
Sister taxa: Braginella, Centrocubidae, Entactiniidae, Eptingiidae, Haplentactinia, Haplentactiniidae, Heptacladidae, Hexalonchidae, Hexastylidae, Hindeosphaeridae, Inaniguttidae, Kahlerosphaera, Kungalariidae, Multiarcusellidae, Palaeolithocycliidae, Palaeoscenidiidae, Pentactinocarpidae, Polyentactiniidae, Protoentactiniacea, Proventocitidae, Pylentonemidae, Quinquecapsulariidae, Radium, Rhizosphaeridae, Saturnalidae, Sphaeroentactiniidae, Spongentactiniidae, Spongosaturnaloididae, Thalassothamnidae
Subtaxa: Harsa siswaiensis
Type: Harsa siswaiensis
Ecology: passively mobile planktonic omnivore