Comstock–Needham system

It was an important step in showing the homology of all insect wings.

This system was based on Needham's pretracheation theory that was later discredited by Frederic Charles Fraser in 1938.

[1] The Comstock and Needham system attributes different names to the veins on an insect's wing.

The radius typically branches once near the base, producing anteriorly the R1 and posteriorly the radial sector Rs.

In the case where two cells are separated by a crossvein but have the same anterior longitudinal vein, they should have the same name.