Radiolaria - Spumellaria - Angulobracchiidae

Synonym: Risella Carter 1993 [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: Angulobracchiidae according to S. Uzuncimen et al. 2011

Sister taxa: Angulobracchia, Bistarkum, Cyclastrum, Danubea, Deviatus, Loupanus, Paronaella, Protopsium, Thurstonia

Subtaxa: Risella ellisensis, Risella stalkungiensis, Risella tangilensis, Serilla tledoensis

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Ecology: passively mobile planktonic omnivore