Dictionary of Ichthyology  

pyloric sphincter = the valve-like constriction of the intestine immediately behind the stomach, controlling the flow of food from the stomach. Also called pyloric valve.

Guts of Protopterus from Kingsley's "Textbook of Vertebrate Zoology, 1906. C = caecum, G = gall bladder, HV = hepatic vein, L = liver, O = oesophagus, OD = oviduct, PV = pyloric valve, R = rectum, RD = renal (mesonephric) duct, S = stomach, SP = spleen, SV = spiral valve, V = vent. Photograph by Brian W. Coad.

Canadian Museum of Nature
www.briancoad.com