†Leiostegium (Perischodory) Raymond 1937 (trilobite)
Artiopoda - Corynexochida - Leiostegiidae
Alternative spellings: Lloydia (Perischodory), Perischodory
Parent taxon: Leiostegium according to Berg and Ross 1959
See also Lochman 1965 and Sepkoski 2002
Sister taxa: Leiostegium (Euleiostegium), Leiostegium (Leiostegium), Leiostegium goodwinensis, Leiostegium manitouensis, Leiostegium proprium, Leiostegium puteatum, Leiostegium quadratus, Leiostegium spongiosum, Leiostegium tyboensis
Subtaxa: Perischodory incompertum
Ecology: nektobenthic carnivore
Distribution:
• Ordovician of Canada (1: Northwest Territories collection), United States (1: Montana)
Total: 2 collections each including a single occurrence