Mormolucoides articulatus
From the collection of Yale Peabody Museum. Free to download, adapt and use — no permission needed.
Geological context: Early Jurassic, Turners Falls Ss. Collection locality: black sh, [property of T.M. Stoughton, 1871 Beers County map, previously owned by Dr. Roswell Field], S side of Connecticut River, Horse Race, Montague, Franklin County, Massachusetts, USA. Collected by Othniel C. Marsh, 1867-04. IPB.09956: Massachusetts. Franklin County. black sh, [property of T.M. Stoughton, 1871 Beers County map, previously owned by Dr. Roswell Field], S side of Connecticut River, Horse Race, Montague. Coll: Marsh, O. C. Apr 1867. Early Jurassic. Turners Falls Ss.; IP number 33029; lot count 10; original nature=part/counterpart; accn=YPM.01637.
Yale Peabody Museum’s own description