ANATOMY AND HISTOLOGY OF THE ALIMENTARY CANAL OF THE BEETLE, HECROBIA RUFIPES DE (COLEOPTERA: CLERIDAE)

摘要

The alimentary canal of Necrobia ruflpes DeGeer is about one and a half times longer than its body length. It is clearly divisible into foregut, midgut and hindgut. The foregut is distinguishable into pharynx, oesophagus and proventriculus. There is no division in the midgut, the surface of which is provided with numerous short regenerative crypts. The hindgut consists of a pyloric chamber, ileum, colon and rectum. The colon is divisible into anterior colon and posterior colon. A proventricular invagination is present. The epithelium of the foregut and hindgut is formed of cuboidal cells. The midgut consists of columnar epithelial cells and regenerative cells. Regenerative crypts are formed by the midgut epithelium. A peritrophic membrane is present. The visible secretion of the midgut is merocrine type.