[Structure and nutritional characteristics of the female Simondsia paradoxa (Nematoda, Spirurata)--a gastric parasite of swine]. / Stroenie i osobennosti pitaniia samki Simondsia paradoxa (Nematoda, Spirurata)--parazita zheludka svinei.

Distinct dimorphism is inherent in the nematode Simondsia paradoxa. The male is small in size, its body is cylindrical which is typical of nematodes. The female is large with a very large spherical expansion in the middle part of the body. This difference in the female and male structure is due to their different localization. Male lives in the lumen of the stomach, female--in the thick stomach wall. The present paper gives the original morphological description of a female, besides some characteristics in the structure of this parasite have been revealed allowing the authors to outline the probable types of the parasite nutrition. The authors believe that along with digestive organs the covering tissues through which important substances enter the female body also take part in nutrition of the female.

[Ecological significance of the dilation of the distal portion of the uterus of some trematodes]. / Ekologicheskoe znachenie rasshireniia distal'nogo uchastka matki nekotorykh trematod

Many trematodes parasitic in the oral cavity, pharynx or oesophagus of snakes and birds or in the cloaca of birds possess a sac-shaped dilation of the uterine distal portion or the organ itself is sac-shaped. Trematodes possessing such uterus lay periodically more or less portions of eggs. The time of egg laying depends on the frequency of some functions of the host's organs (food capture by the host, swallowing the food, defecation), which the trematodes inhabit.