Grewingkia sp.
From the collection of Yale Peabody Museum. Free to download, adapt and use — no permission needed.
Geological context: Late Ordovician. Collection locality: RR cut at new dam 4 or 5 mi E of Dayton, Greene County, Ohio, USA. Collected by Carl O. Dunbar, 1921-09-19. IP number 332142; lot count 1; accn=YPM.03496; associatedwith=IP.332151,IP.332152,IP.332153,IP.332168,IP.332178,IP.332179,IP.332180,IP.332181,IP.332182,IP.332183,IP.332184,IP.332185,IP.332186,IP.332187,IP.332188,IP.332192,IP.332193,IP.332194,IP.332195,IP.332191,IP.332169,IP.332170,IP.332171,IP.332172,IP.332173,IP.332174,IP.332175,IP.332176,IP.332177,IP.332167,IP.332154,IP.332155,IP.332156,IP.332157,IP.332158,IP.332159,IP.332160,IP.332161,IP.332162,IP.332163,IP.332164,IP.332165,IP.332166,IP.332189,IP.332190,IP.332196,IP.332197,IP.332198,IP.332199,IP.332200,IP.332201.
Yale Peabody Museum’s own description