Hamula is found in which abdominal segment in Collembola?

Hamula is found in 3^rd abdominal segment in Collembola.
The organ most often is present in species of Collembola that lives in the upper soil layers where it is used for jumping to avoid predators.
While at rest, it is retracted under the abdomen and held there by a structure variously called the retinaculum or hamula, which in turn is located beneath the third abdominal segment.