The study of tarsal organ in 4 genus of the family Spinturnicidae show generic differences usable in taxonomy. It is possible to propose a fundamental model with 9 setae and a microcup containing 3 microsetae for an advanced Spinturnicidae (genus Spinturnix). Four setae secrete a substance through microhole located in furrows. In this hypothesis on the evolution of the family, the genus Eyndhovenia would be less advanced than genus Spinturnix but more than genus Periglischrus, genus Periglischrus show a sketch of microcup with only 2 microsetae. Genus Paraperiglischrus would be the most primitive with only 7 setae and without microcup. A more complete study, will be possible when we shall have finished our observations on the other genus of the family.