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《Chinese Journal of Animal and Veterinary Sciences》 1958-01
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TRIODONTOPHORUS HSIUNGI N. SP., A NEW NEMATODE PARASITE OF DONKEY

K'UNG FAN-YAO  
From parasitic materials collected from donkey in Peking, we have found a new species of nematode. The specific name, Triodontophorus hsiungi n. sp., is given in honour of my teacher, professor Hsiung Ta-Shih. Twenty specimens (100, 10Ω) were examined and they were taken from a large number of both sexes collected from the large colon of the donkey in Peking. Mouth collar low, limited behind by shallow cephalic groove; cervical papillae situated 0.5—0.86 mm from anterior end of worm; excretory pore at level of cervical papillae; nerve ring situated about 0.51—0.55 mm from anterior end of worm. Length of buccal capsule 0.14—0.175 mm, its inner diameter 0.15—0.19 mm. The tooth composed of a median triangular process, and two lateral lamellae. The anterior part of each lamella divided into three tooth-lille processes, the median process is higher than the laterals. External leaf-crown composed of 64 elements. Oesophagus club-shaped, about 0.83—1.14 mm long, swollen in final quarter, with greatest width of 0.175—0.24 mm. Male 14.8—17.0 mm long by 0.5—0.65 mm in width. Bursa of the same type as that of T. minor. Dorsal lobe very long. Spicules thin, relatively short, 0.86—0.95 mm. The terminal hooks being well developed and forming sharp angles with the shafts. Gubernaculum trough-shaped, 0.196—0.213 mm long. Female 19.9—22.0 mm long by 0.54—0.74 mmin width. Tip of tail pointed, 0.151—0.19 mm long, vulva situated 0.47—0.53 mm from anus. Host: Equus asinus. Locality: large colon. Place of distribution: Peking.
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