Grandisonia Taylor, 1968, Caecilians of the World: 749. Type species: Hypogeophis alternans Stejneger, 1893, by original designation.
Seychelles Caecilians (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 24).
Seychelles Islands, Indian Ocean.
Wilkinson and Nussbaum, 2006, In Exbrayat (ed.), Reprod. Biol. Phylog. Gymnophiona: 49, 64, diagnosed the taxon and suggested that Grandisonia is paraphyletic with respect to Hypogeophis and that this group is the sister taxon of Praslinia.
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