(syn. Pelecanoides Ϯ Magellanic Diving-petrel P. magellani) Gr. πορθμος porthmos  strait, narrow sea (i.e. Straits of Magellan)  < πορος poros  strait; ορνις ornis, ορνιθος ornithos  bird; "Fig. 2.  Dorsal and ventral aspects of the bills of four subgenera of Pelecanoididæ, drawn to scale but enlarged: a, Puffinuria (Pelecanoides garnoti); b, Porthmornis  (Pelecanoides magellani); c, Pelagodyptes (Pelecanoides georgicus); d, Pelecanoides (Pelecanoides urinatrix berard)  ... [Key]  Porthmornis, 1 new subgenus.  ...  1 πορθμος, a strait + ορνις, bird.  ...  Subgenus PORTHMORNIS Murphy and Harper  ...  TYPE LOCALITY.— Strait of Magellan." (Murphy & Harper 1921); "Porthmornis (subgen.) Murphy and Harper, Bull. Am. Mus. Nat. Hist., 44, 1921, p. 502, f. 2, b., p. 503 (in key), p. 513. Type, by monotypy, Puffinuria garnotii magellani Mathews." (Peters 1931, 1, 75).

Search for more names on the Key to Scientific Names in Ornithology by James A. Jobling.
Recommended citation
Jobling, J. A. (2018). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2018). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from www.hbw.com on 18 December 2018).