The genus
Ixos was introduced in 1825 by the Dutch zoologist
Coenraad Jacob Temminck to accommodate the
Javan bulbul. The genus name is the
Ancient Greek for "mistletoe". Some authorities have advocated a complete merger of the genus
Ixos with
Hypsipetes – and even the entire "
Hypsipetes group" of bulbuls, which also includes
Hemixos,
Iole and
Tricholestes. Being the oldest
genus name,
Ixos would apply to all of them, rather than
Hypsipetes as is often believed. This re-classification seems hardly appropriate however, since
Alophoixus and
Setornis cannot be excluded from the "
Hypsipetes group", and an all-out merge would turn the resultant "genus"
Ixos into an ill-defined "
wastebin taxon". The erroneous inclusion of
I. virescens in
Hypsipetes has caused the
Nicobar bulbul to be listed under its invalid
junior synonym H. nicobariensis rather than the valid names
H. virescens or
I. nicobariensis.
Former species Formerly, some authorities also considered the following species (or subspecies) as species within the genus
Ixos: •
Nicobar bulbul (as
Ixos nicobariensis) •
Spot-necked bulbul (as
Ixos tympanistrigus) •
Grey-headed bulbul (as
Ixos Fisquetti) •
Scaly-breasted bulbul (as
Ixos squamatus) •
Red-whiskered bulbul (pyrrhotis) (as
Ixos pyrrhotis) •
Red-whiskered bulbul (emeria) (as
Ixos emeria) •
Chinese red-whiskered bulbul (as
Ixos monticola) •
Brown-breasted bulbul (andersoni) (as
Ixus Andersoni) •
Light-vented bulbul (hainanus) (as
Ixus hainanus) •
White-eared bulbul (as
Ixos leucotis) •
Sooty-headed bulbul (germani) (as
Ixus Germani) •
White-spectacled bulbul (as
Ixus xanthopygos) •
Common bulbul (as
Ixos inornatus) •
Dark-capped bulbul (as
Ixos tricolor) •
Pale-eyed bulbul (as
Ixus Davisoni) •
Yellow-throated bulbul (as
Ixos xantholaemus) •
Yellow-vented bulbul (gourdini) (as
Ixos gourdini) •
Spectacled bulbul (as
Ixos erythropthalmos) •
Yellow-throated leaflove (as
Ixus flavicollis) •
Yellow-bellied bulbul (as
Ixos phaeocephalus) •
Sulphur-bellied bulbul (as
Ixos palawanensis) •
Seram golden bulbul (as
Ixos affinis) •
Philippine bulbul (as
Ixos philippinus) •
Mindoro bulbul (as
Ixos mindorensis) •
Visayan bulbul (as
Ixos guimarasensis) •
Zamboanga bulbul (as
Ixos rufigularis) •
Streak-breasted bulbul (as
Ixos siquijorensis) •
Yellowish bulbul (as
Ixos everetti) •
Brown-eared bulbul (as
Ixos amaurotis) ==Footnotes==