Oshmarin P G
Parazitologiia. 1975 Sep-Oct;9(5):432-8.
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.
许多寄生在蛇和鸟类口腔、咽部或食道，或鸟类泄殖腔中的吸虫，其子宫远端部分呈囊状扩张，或者器官本身呈囊状。具有这种子宫的吸虫会周期性地产下或多或少的卵。产卵时间取决于吸虫所寄生的宿主器官某些功能的频率（宿主捕获食物、吞咽食物、排便）。
