套茎属、拟套茎属的分类简史及套茎属一新种记述(复殖吸虫亚纲,半尾科)

记述了新种棱皮龟套茎吸虫Elytrophallus dermochelysi sp.nov.对套茎属和其近缘属拟套茎属的分类历史作了回顾,讨论了所存在的分类问题及其渊源.套茎属的分类在历史上对于体表横纹环褶(plications)的有无这个特征有着不同的对待,存在一定的混乱,但目前此特征是区分两属最为可行的鉴别特征.对于两属吸虫其他的形态性状,本文亦作了综合讨论.

DISCUSSION ON THE HISTORY OF GENERA ELYTROPHALLUS AND ELYTROPHALLOIDES AND DESCRIPTION OF A NEW SPECIES OF ELYTROPHALLUS (DIGENEA, HEMIURIDAE)

Brief study history of genera Elytrophallus and Elytrophalloides is reviewed. The only reliable key now to distinguish these two close-related genera is whether the body-surface is with plications. The comparison based on other characters, such as on the shape of vitelline lobes, is still somewhat confusing. Elytrophallus coiliae Wang, 1982 and Elytrophallus rhabdosargi Wang, 1987 should not be put in genus Elytrophallus, for their body-surface were both described with plications. We are still not certain about their status because their terminal genitalia were not adequately described. Elytrophallus dermochelysi sp. nov. from the stomach of the leatherback turtle is described. The new species is very similar to E. carettae Blair, 1984. They can both be distinguished from other members of the genus by their chelonian hosts, larger body size, vitellaria shape and not-posteriorly-extending uterus. The new species differs from E. carettae in the following characters: its body size is much larger than that of E. carettae; sucker ratio is smaller; the base of sinus sac is more anterior in relation to the seminal vesicle.