†Illaenopsis Salter 1865 (trilobite)
Trilobita - Asaphida - Nileidae
PaleoDB taxon number: 19992
Synonym: Rokycania Pribyl and Vanek 1965 (taxon 155829)
Parent taxon: Nileidae according to P. A. Jell and J. M. Adrain 2002
Sister taxa: Aocaspis, Barrandia, Berkutaspis, Borthaspidella, Homalopteon, Kodymaspis, Neopsilocephalina, Nileidae stenorhachis, Nileus, Parabarrandia, Paraperaspis, Peraspis, Petrbokia, Platypeltoides, Poronileus, Psilocephalinella, Shenjiawania, Symphysurina, Symphysurus, Varvia
Subtaxa: Illaenopsis stenorhachis, Illaenopsis thomsoni
Ecology: fast-moving low-level epifaunal carnivore