Emiliodonta

Emiliodonta Temporal range: Ma PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Nuculida
Family:	†Praenuculidae
Subfamily:	†Concavodontinae
Genus:	†Emiliodonta Sánchez, 2010
Species:	†E. cuerdai
Binomial name
†Emiliodonta cuerdai (Sánchez, 1999)
Synonyms
Emiliania Sánchez, 1999

Emiliodonta is an

Emiliodonta cuerdai is a bivalve first described in 1999 by Teresa M. Sánchez from fossils from sediments of the late Middle Ordovician, Caradocian-aged Don Braulio Formation. The formation outcrops on the flank of Sierra de Villicum in the Argentina precordillera.^[1][3] Generally the shells of Emiliodonta cuerdai are rounded and distinctly inflated. The shells have an umbo positioned on the anterior edge of the shell prosogyratly, with the beak curving towards the anterior side. The shell hinges have a series of twelve to fourteen concavodont teeth along the posterior edge and a series of five larger concavodont teeth on the anterior edge. The two series meet at the umbo with a group of four to five orthomorphic teeth. Emiliodonta ranges in shell length from 4.0 to 6.7 millimetres (0.16 to 0.26 in) and has a height between 4.0 and 5.5 millimetres (0.16 and 0.22 in).^[1] As a member of Concavodontinae, the hinge displays the chevroning of teeth typical of the subfamily. The teeth have a concavity in the chevron, which faces away from the center of the hinge and the umbo.

When first described, the genus name Emiliania was chosen by Sánchez in reference to her father Emiliano Sánchez.