Abstract
The phylogenetic relationships of the Blue Tit–Azure Tit assemblage (genus Parus; Aves: Passeriformes) were studied using mitochondrial DNA sequences of 24 specimens representing seven subspecies from Eurasia and North Africa. Previous work based on comparative morphological and acoustic data suggested a division of the Blue Tit ( Parus caeruleus) into two species. Our analyses clearly indicate that the Blue Tit represents a paraphyletic assemblage, including a European/Middle Asian clade that is the sister group to the Azure Tit ( Parus cyanus) and a North African clade. The North African clade ( teneriffae subspecies group) is a sister group to the European Blue Tit/Azure Tit clade. We suggest a division of the Blue Tit into two separate species, Eurasian Blue Tit ( Parus caeruleus s. str.) and African Blue Tit ( Parus teneriffae). However, our data give no support for assigning species rank to Parus cyanus flavipectus, a subspecies of the Azure Tit, as suggested by several authors on morphological grounds.
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