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The paper describe a diverse dinosaur eggshell assemblage from the St. Mary River Formation of southern Alberta. Its paywalled but presented here to show others that it exists. Three theropod eggshell types (Continuoolithus cf. C. canadensis, Montanoolithus cf. M. strongorum, and Prismatoolithus cf. P. levis) and one ornithopod (Spheroolithus cf. S. albertensis), are reported from Albertan exposures of the St. Mary River Formation. Paywalled http://www.nrcresearchpress.com/doi/abs/10.1139/cjes-2017-0195#.WnjKE66nHIV @HamptonsDoc @-Andy-
Fossil Snail Sea Shell Turritella plebia St. Mary's formation, in the Calvert Cliffs, of Calvert County, Maryland Miocene Period, 23 million years ago Turritella is a genus of medium-sized sea snails with an operculum, marine gastropod mollusks in the family Turritellidae. They have tightly coiled shells, whose overall shape is basically that of an elongated cone. The name Turritella comes from the Latin word turritus meaning "turreted" or "towered" and the diminutive suffix -ella. The Gastropoda or gastropods, more commonly known as snails and slugs, are a large taxonomic class within the phylum Mollusca. The class Gastropoda includes snails and slugs of all kinds and all sizes from microscopic to Achatina achatina, the largest known land gastropod. There are many thousands of species of sea snails and sea slugs, as well as freshwater snails, freshwater limpets, land snails and land slugs. The class Gastropoda contains a vast total of named species, second only to the insects in overall number. The fossil history of this class goes back to the Late Cambrian. There are 611 families of gastropods known, of which 202 are extinct and appear only in the fossil record. Kingdom: Animalia Phylum: Mollusca Class: Gastropoda Order: Sorbeoconcha Family: Turritellidae Genus: Turritella Species: plebia