The final branch which is important for the digestive system is the inferior mesenteric artery, which supplies the regions of the digestive tract derived from the hindgut, which includes the distal 1 / 3 of the transverse colon, descending colon, sigmoid colon, rectum, and the anus above the pectinate line.
42.
Corydalinae is distinguished from closely related clades by the following synapomorphies ( with exceptions in a few species ) : quadrate head with a postocular spine, ridge, and plane, non-pectinate antennae, four crossveins between the radius and the radial sector, and distinctive male terminalia with a well developed ninth gonostylus.
