Ostenocaris

Ostenocaris Temporal range: Sinemurian to Callovian 198–164 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Reconstruction
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	†Thylacocephala
Order:	†Conchyliocarida
Family:	†Ostenocarididae Arduini, Pinna & Teruzzi, 1980[1]
Genus:	†Ostenocaris Arduini, Pinna & Teruzzi, 1980
Species:	†O. cypriformis
Binomial name
†Ostenocaris cypriformis Arduini, Pinna & Teruzzi, 1980

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Ostenocaris is a Jurassic species of giant Thylacocephalan crustacean, sufficiently distinct from its relatives to be placed in its own family, Ostenocarididae. It is believed to be a bethonic animal and one of the most important necrophagous animals of its environment. Originally Interpreted as a bizarre barnacle. Ostenocaris is the most common fossil of the formation, and the main identified thylacocephalan from the formation. In the first interpretations, the genus was shown as a filter-feeding organism, which used the cephalic sac as a burrowing organ to ensure adhesion to the substrate. Based on the presence of Coprolites associated to the genus, with abundant masses of alimentary residues (hooks of cephalopods, vertebrates, remains of Crustacea) in the stomach of these organisms, Ostenocaris cypriformis was probably a necrophagous organism, and the cephalic sac can be tentatively interpreted as being a burrowing organ employed during the search for food, or as an organ of locomotion with intrinsic motility.^[2] Later studies agree that cephalic sac is actually extremely large compound eyes.^[3]