Studies on the helminth fauna of Alaska. 43. Strigea macropharynx sp. n., a trematode parasite of Falco rusticolus L.
نویسندگان
چکیده
Strigea macropharynx sp. n. (Trematoda : Strigeata, Strigeidae), an intestinal parasite of Falco rusticolus L., is described. Falconiformes harbor two species of Strigea (S. falconis Szidat, 1928, and S. macroconophora Dubois and Rausch, 1950) with vitellaria terminating near the copulatory bursa. Both differ from the new species in having a pharynx that is smaller than or subequal to the buccal sucker, as well as in other details. In S. elegans Chandler and Rausch, 1947, a parasite of Strigiformes, the eggs are larger, the testes of different form, and the vitellaria extend significantly farther into the region of the copulatory bursa. The very intimate contact existing between the tribocytic organ of S. macropharynx and the intestinal mucosa of the host suggests that extracorporeal digestion of host tissue takes place. Twenty-six specimens of the trematode described herein were found among numerous neodiplostomes, Neodiplostomum (Conodiplostomum) spathula banghami Penrod, 1947, in the small intestine of a gyrfalcon, Falco rusticolus L. This bird (No. 31001), an adult female, was collected on 19 April 1964, at its nest in upper Keruktagiak Creek, about 18 miles northwest of Chandler Lake, central Brooks Range, Alaska. The intestine was immediately removed and opened in order to prevent degenerative changes in the helminths. Because of severe cold, the material could not be fixed until some hours later, at which time some of the trematodes nevertheless could be
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ورودعنوان ژورنال:
- The Journal of parasitology
دوره 51 5 شماره
صفحات -
تاریخ انتشار 1965