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Asaphus (Neoasaphus) kowalewskii, stalk- eyed trilobiteA complete 3-dimensional stalk-eyed trilobite measuring about 5 cms, discovered at Wolchow River, near St. Petersburgh, Russia. The specimen dates back to the Middle Ordovician period
Ogygiocaris, a fossil trilobiteComplete specimen of the Welsh Ordovician trilobite Ogygiocaris, measuring 3.8 cm in length and showing the three-lobed dorsal exoskeleton
Dorsal & Ventral Isotelus platycephalusSyntype (?Holotype by monotypy) of Asaphus, now Isotelus platycephalus (Stokes, 1824) Ordovician, Black River Group; St Josephs Island, Lake Huron, Ontario Bigsby Colln. Date: 1824
