Martin Cake, Andrew Black and Leo Joseph. The generic taxonomy of the Australian Magpie and Australo-Papuan butcherbirds is not all black-and-white. Bull. B.O.C. 2018 138(4), pg(s) 346–359.
Abstract:
Recent phylogenetic analyses showing that Australian Magpie and
Black Butcherbird are sister taxa and together comprise the sister group of other
Australo-Papuan butcherbirds have justifed an expanded Cracticus. This treatment
refects earlier arguments that Australian Magpie’s distinctive traits are simply
adaptations to terrestrialism and not a sound basis for recognition of a monotypic
Gymnorhina. Acknowledging the expediency of a broad Cracticus, we reviewed data
from anatomy, plumage, nidifcation and voice to reassess the optimal number
of genera for the group, in particular whether Melloria is warranted for Black
Butcherbird. Australian Magpie has multiple unique traits, including many without
obvious adaptive signifcance for terrestrial foraging or open habitat. It shares with
Black Butcherbird glossy black plumage, long tarsus and deep temporal fossa, and
short currawong-like calls. Black Butcherbird’s rounded wing is possibly adaptive
for closed-forest habitats. We recommend use of Gymnorhina, Melloria and Cracticus
to represent this evolutionary diversity within the butcherbird-magpie clade.
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