Belongs within: Strigidae.
Bubo is a Holarctic genus of large owls with small external ear openings, often with distinct ear tufts.
<==Bubo Duméril 1806M02 [incl. Ketupa Lesson 1830B94, Nyctea Stephens 1826M02, Ophtalmomegas Dehaut 1911M02; Ketupinae]
|--+--B. lacteus (Temminck 1924)BKB15, M-PG70 [=Strix lacteaM-PG70]
| `--+--B. nipalensisBKB15
| | |--B. n. nipalensisA72
| | `--B. n. blighiA72
| `--+--‘Ketupa’ ketupuBKB15
| | |--K. k. ketupuRN72
| | |--K. k. aagaardiRN72
| | |--K. k. minorRN72
| | `--K. k. pageliRN72
| `--B. zeylonensis (Gmelin 1788)M02 (see below for synonymy)
| |--B. z. zeylonensisA72
| |--B. z. leschenaultA72 [=Ketupa leschenaultiE42; incl. B. zeylonensis hardwickiiA72]
| `--B. z. semenowiA72
`--+--+--B. scandiacus (Linnaeus 1758)BKB15, M02 (see below for synonymy)
| `--+--B. magellanicusBKB15
| `--B. virginianusBKB15
| |--B. v. virginianusS05
| `--B. v. arcticus (Swainson in Swainson & Richardson 1831) (see below for synonymy)S05
`--+--+--B. africanus (Temminck 1823)BKB15, M-PG70 [=Strix africanaM-PG70]
| | |--B. a. africanusRN72
| | |--B. a. kollmannspergeri Neithammer 1957M-PG70
| | `--B. a. milesiRN72
| `--B. bengalensisBKB15 [=B. bubo bengalensisA72]
`--+--B. capensisBKB15
`--+--B. ascalaphusBKB15
| |--B. a. ascalaphusM-PG70
| `--B. a. desertorum Erlanger 1897M-PG70
`--B. bubo (Linnaeus 1758)BKB15, M02 (see below for synonymy)
|--B. b. buboA72
|--B. b. hemachalanaA72
|--B. b. nikolskiiA72
|--B. b. tibetanusA72
`--B. b. turcomanusA72
Bubo incertae sedis:
B. blakistoni Seebohm 1884N10, I92 [=Ketupa blakistoniJT12]
B. cinerascens Guèrin-Ménèville 1843JT12, M-PG70 [=B. africanus cinerascensRN72]
B. coromandusJT12
‘Ketupa’ flavipesJT12
B. florianae Kretzoi 1957M02
B. leucostictus Hartlaub 1855M-PG70
‘Nyctea’ nyctea (Linnaeus 1758) (see below for synonymy)S05
B. philippensisJT12
B. poensis Fraser 1853M-PG70
B. shelleyi (Sharpe & Ussher 1872) [=Huhua shelleyi]M-PG70
B. sumatranusJT12
B. vosseleriJT12
Hypothetical taxon: Bubo leguatiF02
Bubo bubo (Linnaeus 1758)BKB15, M02 [=Strix buboM02; incl. B. bubo davidi Mourer-Chauviré 1975M02, B. ignavusF17, Ardea lignitum Giebel 1860M02, B. lignitumM02]
Bubo scandiacus (Linnaeus 1758)BKB15, M02 [=Strix scandiacaM02, Nyctea scandiacaM02; incl. Nyctea scandiaca gallica Mourer-Chauviré 1975M02]
Bubo virginianus arcticus (Swainson in Swainson & Richardson 1831) [=Strix (Bubo) arctica; incl. B. virginianus subarcticus Richardson 1902]S05
Bubo zeylonensis (Gmelin 1788)M02 [=Strix zeylonensisM02, Ketupa zeylonensisBKB15; incl. B. insularis Mourer-Chauviré & Weesie 1986M02, *Ophtalmomegas lamarmorae Dehaut 1911M02, B. lamarmoraeM02, Strix perpasta Ballmann 1976M02, B. perpastusM02]
‘Nyctea’ nyctea (Linnaeus 1758) [=Strix nyctea, Leuchybris nyctea, Surnia nyctea; incl. Nyctea scandiaca var. arctica Ridgway 1874, N. nivea Fischer & v. Pelzeln 1886]S05
*Type species of generic name indicated
References
[A72] Abdulali, H. 1972. A catalogue of the birds in the collection of the Bombay Natural History Society—11. Strigidae and Caprimulgidae. Journal of the Bombay Natural History Society 69 (1): 102–129.
[B94] Bock, W. J. 1994. History and nomenclature of avian family-group names. Bulletin of the American Museum of Natural History 222: 1–281.
[BKB15] Burleigh, J. G., R. T. Kimball & E. L. Braun. 2015. Building the avian tree of life using a large-scale, sparse supermatrix. Molecular Phylogenetics and Evolution 84: 53–63.
[E42] Ewer, W. 1842. List of a collection of birds from India. Proceedings of the Zoological Society of London 10: 91–93.
[F17] Forster, T. 1817. A synoptical catalogue of British birds; intended to identify the species mentioned by different names in several catalogues already extant. Forming a book of reference to observations on British ornithology. Nichols, Son, and Bentley: London.
[F02] Fuller, E. 2002. Foreword. Extinct birds. In: Hoyo, J. del, A. Elliott & J. Sargatal (eds) Handbook of the Birds of the World vol. 7. Jacamars to Woodpeckers pp. 11–68. Lynx Edicions: Barcelona.
[I92] Iwahashi, J. (ed.) 1992. Reddo Deeta Animaruzu: a pictorial of Japanese fauna facing extinction. JICC: Tokyo.
[JT12] Jetz, W., G. H. Thomas, J. B. Joy, K. Hartmann & A. Ø. Mooers. 2012. The global diversity of birds in space and time. Nature 491: 444–448.
[M-PG70] Mackworth-Praed, C. W., & C. H. B. Grant. 1970. African Handbook of Birds ser. 3 vol. 1. Birds of West Central and Western Africa. Longman: London.
[M02] Mlíkovský, J. 2002. Cenozoic Birds of the World. Part 1: Europe. Ninox Press: Praha.
[N10] Naish, D. 2010. Tetrapod Zoology: Book One. CFZ Press: Bideford (UK).
[RN72] Rutgers, A., & K. A. Norris (eds.) 1972. Encyclopaedia of Aviculture vol. 2. Blandford Press: London.
[S05] Schalow, H. 1905. Die Vögel der Arktis. In: Römer, F., & F. Schaudinn (eds) Fauna Arctica. Eine Zusammenstellun der arktischen Tierformen, mit besonder Berücksichtigung des Spitzbergen-Gebietes auf Grund der Ergebnisse der Deutschen Expedition in das Nördliche Eismeer im Jahre 1898 vol. 4 pp. 79–288. Gustav Fischer: Jena.