Boulengerula boulengeri Tornier, 1896, in Möbius (ed.), Deutsch Ost-Afr., 3: 164. Syntypes: ZMB (5 specimens) (reported as mislaid or lost by Taylor, 1968, Caecilians of the World: 337) and BMNH 1946.9.5.1 (formerly 1895.11.15.3) according to Taylor, 1968, Caecilians of the World: 337. ZMB 13224A designated lectotype by Bauer, Good, and Günther, 1993, Mitt. Zool. Mus. Berlin, 69: 286. Type locality: "Usambara", Tanga Division, Tanzania.
Boulenger's Caecilian (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 23; Channing and Howell, 2006, Amph. E. Afr.: 343).
Usambara Bluish-gray Caecilian (Ananjeva, Borkin, Darevsky, and Orlov, 1988, Dict. Amph. Rept. Five Languages: 12).
East Usambara, West Usambara (see comment), and Magrotto mountains, northeastern Tanzania.
See account by Channing and Howell, 2006, Amph. E. Afr.: 343-344. Loader, Wilkinson, Cotton, Measey, Menegon, Howell, Müller, and Gower, 2011, Herpetol. J., 21: 5-16, suggested that populations from the West Usambara Mountains probably representated two unnamed species. See also comments by Loader, Poynton, Lawson, Blackburn, and Menegon, 2011, Fieldiana, Life Earth Sci., 4: 98, regarding the possible cryptic species.
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