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Xenopus fraseri Boulenger, 1905

Class: Amphibia > Order: Anura > Family: Pipidae > Genus: Xenopus > Species: Xenopus fraseri

Xenopus fraseri Boulenger, 1905, Proc. Zool. Soc. London, 1905: 250. Syntypes: 2 specimens in the BMNH, by original designation; BMNH 1947.2.24.78-79 (formerly 1852.2.22.23-24) recorded as syntypes by museum records. Type locality: "West Africa . . . therefore probably from Nigeria or Fernando Po [= Bioko, Equatorial Guinea]".

Xenopus (Xenopus) fraseriKobel, Barandun, and Thiebaud, 1998, Herpetol. J., 8: 13.

English Names

Fraser's Clawed Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 97).

Fraser's Platanna (Channing, 2001, Amph. Cent. S. Afr.: 237-249).

Distribution

Forested West Africa from Cameroon and Bioko (Equatorial Guinea) eastward throughout the Congo River Basin to the Zaire-Uganda border, and southward to northern Angola.

Comment

Xenopus fraseri forms part of a diploid-polyploid cryptic species group with chromosome numbers of 2n = 36 (Xenopus fraseri ), 2n = 72 (Xenopus amieti, Xenopus andrei, Xenopus boumbaensis), and 2n = 108 (Xenopus ruwenzoriensis) (Kobel, du Pasquier, Fischberg, and Gloor, 1980, Rev. Suisse Zool., 87: 924; Loumont, 1983, Rev. Suisse Zool., 90: 169). Existing literature records assigned to Xenopus fraseri therefore require reevaluation. De la Riva, 1994, Rev. Esp. Herpetol., 8: 131-132, provided a record for Equatorial Guinea. Frétey and Blanc, 2001, Bull. Soc. Zool. France, 126: 379, reported this species from Gabon. Lasso, Rial, Castroviejo, and De la Riva, 2002, Graellsia, 58: 21-34, provided notes on ecological distribution in Equatorial Guinea. Jacobsen, 2009, Afr. Herp News, 47: 2-20, reported this species from east-north-central Central African Republic. Channing, Rödel, and Channing, 2012, Tadpoles of Africa: 295–296, provided information on comparative larval morphology.

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