Didynamipus sjostedti Andersson, 1903

Class: Amphibia > Order: Anura > Family: Bufonidae > Genus: Didynamipus > Species: Didynamipus sjostedti

Didynamipus sjöstedti Andersson, 1903, Verh. Zool. Bot. Ges. Wien, 53: 143. Syntypes: NHMG Ba. ex. 221 (2 specimens), according to museum records. Type locality: "Kamerun". Incorrect original spelling of the species name.

Didynamipus sjostedtiBoulenger, 1904, Zool. Rec., 40: 35. Justified emendation of the species name.

Atelophryne minutus Boulenger, 1906 "1905", Ann. Mus. Civ. Stor. Nat. Genova, Ser. 3, 2: 159. Syntypes: 6 specimens (MSNG and BMNH), by original designation; including BM1947.2.20.38–39 (formerly 1906.3.30.162-63) by museum records. Type locality: "Basilè, Fernando Po, 400 to 600 metres altitude". Synonymy by Mertens, 1965, Bonn. Zool. Beitr., 16: 19 (not Noble, 1924, Bull. Am. Mus. Nat. Hist., 49: 147-347, as reported by Grandison, 1981, Monit. Zool. Ital., N.S., Suppl., 15: 188).

Didynamipus sjoestedtiMertens, 1965, Bonn. Zool. Beitr., 16: 19. Amiet, 1976, Rev. Zool. Bot. Afr., 90: 40; Grandison, 1981, Monit. Zool. Ital., N.S., Suppl., 15: 187. Incorrect subsequent spelling.

Didynamipus sjostedtiGrandison, 1985, in Frost (ed.), Amph. Species World: 67. Justified emendation.

English Names

Four-digit Toad (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 44).

Dwarf Toad (Channing and Rödel, 2019, Field Guide Frogs & Other Amph. Afr.: 94).


Bioko (Equatorial Guinea) and southwestern Cameroon into southeastern-most Nigeria.

Geographic Occurrence

Natural Resident: Cameroon, Equatorial Guinea, Nigeria


Art. 32.5.2 (ICZN, 1999, Internatl. Code Zool. Nomencl., Ed. 4) restricts the exchange of ö for oe to German words; Sjöstedt is Swedish. See photograph, map, description of geographic range and habitat, and conservation status in Stuart, Hoffmann, Chanson, Cox, Berridge, Ramani, and Young, 2008, Threatened Amph. World: 194. See Cole, Townsend, Reynolds, MacCulloch, and Lathrop, 2013, Proc. Biol. Soc. Washington, 125: 375-376, for brief account and records for Guyana. Gonwouo, Ndeh, Tapondjou, and Noonan, 2013, Check List, 9: 780-782, provided new records and mapped the geographic distribution. Channing and Rödel, 2019, Field Guide Frogs & Other Amph. Afr.: 94–95, provided a brief account, photograph, and range map. See brief account, range map for Bioko, Equatorial Guinea, in Sánchez-Vialas, Calvo-Revuelta, Castroviejo-Fisher, and De la Riva, 2020, Proc. California Acad. Sci., Ser. 4, 66: 137–230.

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