Family: Illaenidae HAWLE & CORDA 1847
Genus: Genus Illaenus DALMAN 1827
Illaenus sulcifrons HOLM 1886
Age: Middle Ordovician
Locality: Vilpovitsy quarry, St.Petersburg region, Russia
Family: Illaenidae HAWLE & CORDA 1847
Genus: Genus Illaenus DALMAN 1827
Illaenus sulcifrons HOLM 1886
Age: Middle Ordovician
Locality: Vilpovitsy quarry, St.Petersburg region, Russia
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