204 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



GONGYLONEMA INGLUVICOLA Ransom 1904b 



See Addenda, p. 390, for Gongylonema ingluvicola (?) of Smit 

 and Notosoediro, 1926. 



Host. — Primary: Gallus gallus; secondary: Unknown, probably 

 coprophagus beetles or other coprophagus arthropods eaten by 

 chickens. 



Location. — Sewn in the mucous lining of the crop and, occasionally, 

 the undilated portion of the esophagus. 



Morphology. — Gongylonema (p. 203) : White or yellowish worms. 

 Cuticle annulated. At the anterior end of the body (fig. 274a) is 

 a zone of shield-like markings, few and scattered near the head and 

 numerous and arranged in longitudinal rows farther back. Around 

 the excretory pore is a large plate-like shield. On each side of the 

 anterior end of the body is a narrow lateral membrane, which grad- 

 ually becomes narrower posteriorly and disappears. The mouth is 

 small and surrounded by a chitinous collar. The anterior portion 



Pig. 274. — Gongylonemna ingluvicola. a, Head ; b, male tail. After Ransom, 1904 



of the esophagus is short, slender, and colorless, and the posterior 

 portion is long, thicker, and yellow. 



M ale 17 to 20 mm. long by 224 to 250/* wide. Cuiicular bosses ex- 

 tend for distance of 575 to 680/* from head end. The tail (fig. 2746) 

 has two narrow caudal alae, the right 500 to 736/* long and the 

 left 600 to 800/* long. Genital papillae variable in number and 

 asymmetrical; preanal papillae are 5 to 7 on the left side (Wharton 

 finds 2 to 7) and 4 to 5 on the right (Wharton finds to 7) ; post- 

 anal papillae are 3 to 4 on the left side (Wharton finds 2 to 5) and 

 4 on the right (Wharton finds 3 to 5). The cloacal aperture 225 

 to 275/* from the tip of the tail. Left spicule as long as the body 

 and 7 to 9/* wide, with a barbed point ; right spicule 100 to 120/* long 

 by 15 to 20/* wide. 



Female 32 to 55 mm. long by 320 to 490/* wide. Cuticular bosses 

 extend for distance of 1.3 to 2.6 mm. from head end. Anus 165 to 

 288/* from tip of tail. Vulva 2.5 to 3.5 mm. from tip of tail. Vagina 

 11 to 14 mm. long. Eggs 50 to 57/* long by 36 to 38/* wide, the shell 

 4/* thick, and containing embryos when deposited. 



Embryo 160/* long by 8/* wide, and provided with a spine at the 

 anterior end. 





