Redescription of the African duck leech Theromyzon cooperi (Harding, 1932) (Hirudinea: Glossiphoniidae)

ENGLISH ABSTRACT: The African duck leech Theromyzon cooperi, which is the only representative of the genus so far reported in Africa, is redescribed. Aspects of its internal morphology are described for the first time. The conspecificity of the two supposed species T. cooperi and T. lineatum is also indicated. ********* AFRIKAANSE OPSOMMING: Die eendbloedsuier Theromyzon cooperi, wat tot dusver die enigste verteenwoordiger van die genus is wat vir Afrika aangemeld is, word herbeskryf. Die inwendige morfologie van hierdie bloedsuier word vir die eerste keer beskryf en die gelyksoortigheid van die gewaande twee verskillende spesies T. cooperi en T. lineatum word aangedui.