Tetrakentron is a monospecific genus of apparently parasitic tardigrade, within the family Styraconyxidae. The species and genus were named by Lucien Cuénot in 1892. The species has been found only near Roscoff, Brittany, France, in the Atlantic Ocean.Tetrakentron synaptae, World Register of Marine Species It was discovered living on a sea cucumber species Leptosynapta inhaerens.Cuénot, 1892 : Commensaux et parasites des Echinodermes, (deuxième note). Revue biologique du nord de la France, vol. 5, p. 16-19
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