0 a Latin word meaning "neck", used in descriptions of the neck and parts of the body that are like the neck
The collum forms an angle with the shaft in about 130 degrees.
The highest point of the greater trochanter is located higher than the collum and reaches the midpoint of the hip joint.
The collum (first segment behind the head) is small while the second tergite is greatly enlarged.
These keels are produced by the posterior half (metazonite) of each body ring behind the collum.
The head of the femur is connected to the shaft through the neck or "collum".
The highest point of the greater trochanter is located higher than the collum and reaches the mid point of the hip joint.
The first segment (collum) is relatively narrow, giving the appearance of a distinct neck in many species.
