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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	[The Seicercus burkii complex in the Himalayas and in China or: Do we estimate the diversity of passerine birds incorrectly?]
Auteurs :	Jochen Martens, Auteur ; Siegfried Eck, Auteur
Type de document :	Article
Dans :	Ornithologischer Anzeiger (39(1) Feb., 2000)
Article en page(s) :	1-14
Résumé :	The warbler Seicercus burkii of southeastern Asia is a composite: in different mountains, excluding vertical parapatry in the same massif, it comprises two (Nepal Himalayas, Wa Shan), three (Mt. Victoria/Burma) or four (Taibai Shan, Omei Shan) biospecies. Song, calls, body proportions, coloration and the cytochrome-b gene distinguish these taxa/populations, between which no gene flow has yet been detectable (by cyt b). At species level eight taxa can be discriminated, some of which may yet be assigned subspecies relationships: S. burkii s. str., S. whistleri (both Himalayas), S. valentini, S. omeiensis, S. "latouchei" (=S. soror ALSTROEM and OLSSON), S. distinctus (all in China, some also Burma and N Vietnam), S. (spec.?) nemoralis (NE India, Burma), S. (spec.?) tephrocephalus (Burma). Unless contradictory evidence is discovered, the southeastern edge of the palearctic is evidently not inhabited by S. burkii s. str. as previously thought, but by S. whistleri. In palearctic China, though zoogeographic boundaries are difficult to infer there, S. valentini, S. omeiensis, S. soror and S. distinctus (S. tephrocephalus in ALSTROEM and OLSSON 1999) have been found. The independent investigation of the Seicercus burkii complex by ALSTROEM and OLSSON (1999), published simultaneously with the paper of MARTENs et al. (1999), yielded results consistent in principle with the above for this extremely complex material.

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