Der taxonomische Status vonLaniarius dubiosus (Rchw. 1899) mit ergänzenden Daten zur Typusbeschreibung vonLaniarius liberatus, Bulo Burti Boubou (Smith, Arctander, Fjeldså & Amir 1991)

In 1899 REICHENOW described a new bushshrike species from East Cameroons which he named Laniarius dubiosus. This bird was in juvenile plumage (a colour-plate is given). DNA-sequence-analysis of cytochrome b (from feathers and skin of the type specimen ZMB 33 764 from Berlin) shows that this bird is a juvenile of the western race of Luehder's Bushshrike Laniarius luhderi. The first presumed assumption - based on a great plumage similarity - that L. dubiosus may be a juvenile from the recently new described Bulo Burti Boubou Laniarius liberatus (SMITH, ARCTANDER, FJELDSA, & AMIR 1991) could not be supported. L. dubiosus sequences are distinct from L. liberatus (see PRINZINGER et al. 1997). Additional data for the type description of Laniarius liberatus are given for the voice (sonagrams) and the coloration of plumage.