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Multiple molecular phylogenetic studies have demonstrated that two Neotropical raptors, tiny hawk    Accipiter   superciliosus    and its sister species semicollared hawk    A.   collaris   , are not closely related to core    Accipiter   , and that    A.   superciliosus   , at least, possesses osteological characters not replicated in the remainder of the genus. Based on these data, there is a need to recognise their distinctiveness at generic level. However, as recently noted in two global bird checklists, no name is available to accommodate them, so we provide a new  nomen  here. Furthermore, two Asian accipitrids, crested goshawk    A.   trivirgatus    and its presumed closest relative Sulawesi goshawk    A.   griseiceps   , are also phylogenetically distinctive; in this case the genus-group name    Lophospiza    is applicable. We also designate type species for two genus-group names (   Hieraspiza    and    Eusparvius   ) currently in the synonymy of    Accipiter   , and, as an aid to future workers, we provide a synonymy of the genus    Accipiter    and a list of species currently included in    Accipiter    for which published molecular phylogenetic data are apparently lacking.

vertebrate zoology

A new genus for the tiny hawk    Accipiter   superciliosus    and semicollared hawk    A.   collaris    (  Aves  :   Accipitridae  ), with comments on the generic name for the crested goshawk    A.   trivirgatus    and Sulawesi goshawk    A.   griseiceps