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MACHAERIRHYNCHUS Gould, 1851 M - Machaerirhynchus flaviventer Gould, 1851; type by monotypy   
Machaerirhynchus flaviventer Yellow-breasted Boatbill
albifrons G.R. Gray, 1862 iWaigeo (Western Papuan Is.)
albigula Mayr & Meyer de Schauensee, 19392 iMisool, Salawati, lowland NW and N New Guinea (Vogelkop to Astrolabe Bay)
novus Rothschild & E. Hartert, 1912 vLowland SE New Guinea (N coast west to Huon Gulf)
xanthogenys G.R. Gray, 1858 iLowland SW, SC and S coast of SE New Guinea, Aru Is.
flaviventer Gould, 1851 iNE Australia (N and E Cape York Pen.)
secundus Mathews, 1912 vNE Queensland
Machaerirhynchus nigripectus Black-breasted Boatbill
nigripectus Schlegel, 1871 iMontane NW New Guinea (mountains of Vogelkop)
saturatus Rothschild & E. Hartert, 19133 vMontane N, WC and EC New Guinea (Foya Mts., Adelbert Range; central cordillera east to Kratke Range)
harterti van Oort, 1909 iMontane NE and SE New Guinea

1 For proposal of family-group name see Schodde & Mason (1999) [Schodde, 1999 #3524], who used the subfamily name. It is here raised to family rank following Norman et al. (2009) [Norman, 2009 #11907] and Aggerbeck et al. (2014) [Aggerbeck, 2014 #15380] who demonstrated distant relationships with Artamidae, not Monarchidae.
2 For inclusion here of Salawati birds see Mayr (1986) [Mayr, 1986 #4723]; but see also Mayr (1941) [Mayr, 1941 #2550] and Rand & Gilliard (1967) [Rand, 1967 #3199].
3 Populations on Foya Mts. and Adelbert Range presumed to be this form.