(Procellariidae; † MacGillivray's Petrel P. macgillivrayi) Gr. ψευδος pseudos  false; genus Bulweria Bonaparte, 1843, petrel; "It is perhaps unfortunate that this bird was placed in the genus Bulweria, as its significance has thereby been lost.  ...  The tail of macgillivrayi is shorter than the tail of Bulweria, although the bird is larger. In the former the first primary is shorter than the second, while in Bulweria the first primary is the longest. The difference can be considered of generic importance, so I introduce PSEUDOBULWERIA, gen. nov.; type, T. MACGILLIVRAYI Gray.  In Bulweria the wing measurement is less than twice the tail measurement; in Pseudobulweria the wing measurement is more than twice that of the tail" (Mathews 1936); "Pseudobulweria Mathews, 1936, Ibis, p. 309.  Type, by original designation, Thalassidroma (Bulweria) macgillivrayi G. R. Gray." (Jouanin & Mougin in Peters, 1979, I, 2nd ed., p. 66).

L. rostratus  beaked, large-billed  < rostrum  beak.
● “The native who carried it finding its bite too severe to be often repeated, submitted the poor creature to a most cruel remedy, often practised by the island bird-catchers, which was to thrust the sharp point of the upper mandible through the lower, thus yoking it with its own jaw; in this state it was kept until the party reached the coast” (Peale 1848) (Pseudobulweria).