†Leiostegium tyboensis Ross, Jr. 1970 (trilobite)
Trilobita - Corynexochida - Leiostegiidae
Full reference: R. J. Ross, Jr. 1970. Ordovician Brachiopods, Trilobites, and Stratigraphy in Eastern and Central Nevada. United States Geological Survey Professional Paper 639
Belongs to Leiostegium according to R. J. Ross 1970
Sister taxa: Leiostegium formosa, Leiostegium goodwinensis, Leiostegium proprium
Type specimen: USNM 160846, a pygidium
Ecology: nektobenthic carnivore