Family: Illaenidae HAWLE & CORDA 1847
Genus: Genus Illaenus DALMAN 1827
Illaenus atavus Eichwald 1857
Age: Middle Ordovician
Locality: Vilpovitsy quarry, St.Petersburg region, Russia
Size: 9.5 cm
Family: Illaenidae HAWLE & CORDA 1847
Genus: Genus Illaenus DALMAN 1827
Illaenus atavus Eichwald 1857
Age: Middle Ordovician
Locality: Vilpovitsy quarry, St.Petersburg region, Russia
Size: 9.5 cm
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