Polyphyletic origin of toxic Pitohui birds suggests widespread occurrence of toxicity in corvoid birds
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منابع مشابه
Polyphyletic origin of toxic Pitohui birds suggests widespread occurrence of toxicity in corvoid birds.
Pitohui birds from New Guinea have been found to contain a toxin otherwise only found in neotropical poison arrow frogs. Pitohuis have been considered to be monophyletic and thus toxicity is thought to have evolved once in birds. Here, we show that Pitohuis, rather than being a tight-knit group, are polyphyletic and represent several lineages among the corvoid families of passerine birds. This ...
متن کاملPhylogeny of the avian genus Pitohui and the evolution of toxicity in birds.
Bird species in the avian genus Pitohui contain potent neurotoxic alkaloids that may be used for defense. The genus comprises multiple species that are endemic to New Guinea and were presumed to belong to the family Pachycephalidae or Colluricinclidae, within the core corvoidea, an ancient Australasian radiation of crow-like birds. In order to understand the evolution of toxicity within the gen...
متن کاملResolving deep lineage divergences in core corvoid passerine birds supports a proto-Papuan island origin.
It is well established that the global expansion of songbirds (Oscines) originated in East Gondwana (present day Australo-Papua), and it has been postulated that one of the main constituent groups, the "core Corvoidea", with more than 750 species, originated in the first islands that emerged where New Guinea is now located. However, several polytomous relationships remained within the clade, ob...
متن کاملA supermatrix phylogeny of corvoid passerine birds (Aves: Corvides).
The Corvides (previously referred to as the core Corvoidea) are a morphologically diverse clade of passerine birds comprising nearly 800 species. The group originated some 30 million years ago in the proto-Papuan archipelago, to the north of Australia, from where lineages have dispersed and colonized all of the world's major continental and insular landmasses (except Antarctica). During the las...
متن کاملHomobatrachotoxin in the genus Pitohui: chemical defense in birds?
Three passerine species in the genus Pitohui, endemic to the New Guinea subregion, contain the steroidal alkaloid homobatrachotoxin, apparently as a chemical defense. Toxin concentrations varied among species but were always highest in the skin and feathers. Homobatrachotoxin is a member of a class of compounds collectively called batrachotoxins that were previously considered to be restricted ...
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ژورنال
عنوان ژورنال: Biology Letters
سال: 2007
ISSN: 1744-9561,1744-957X
DOI: 10.1098/rsbl.2007.0464