†family Secuicollactidae Nazarov and Ormiston 1984 (radiolarian)
Polycystina - Archaeospicularia - Secuicollactidae
Alternative spelling: Secuicollactinae
Synonym: Pseudorotasphaeridae Noble 1994
Parent taxon: Archaeospicularia according to P. Noble et al. 2017
See also De Wever et al. 2001, Noble and Maletz 2000 and Siveter et al. 2007
Sister taxa: Archeoentactiniidae, Echidninacea, Echidninidae, Palaeospiculidae, Protoentactiniidae, Secuicollactacea
Subtaxa: Beothuca Diparvapila Intracorpus Palaeoactinosphaera Pseudorotasphaera Secuicollacta Stylactinosphaera
Type: Secuicollacta
Ecology: passively mobile planktonic omnivore
Distribution:
• Silurian of Sweden (1 collection), the United Kingdom (1)
• Ordovician of the Russian Federation (1), United States (1: Nevada)
Total: 4 collections including 11 occurrences