Taxonomy, Distribution, and Conservation Status of Three Species of Dwarf Galagos (Galagoides) in Eastern Africa

Abstract

This paper reviews the complicated nomenclatural history for the Kenya coast galago, Galagoides cf. cocos, and examines whether ‘cocos’ is the valid species name for this recently resurrected taxon. This paper also reviews the phenotypic and vocal differences among G. cocos; the Zanzibar galago (Galagoides zanzibaricus zanzibaricus); the Udzungwa galago (Galagoides zanzibaricus udzungwensis); and the Mozambique galago (Galagoides granti), as well as their geographic ranges and conservation status. The following are among the findings: (1) ‘Galagoides cocos’ is the name that should be applied to the Kenya coast galago; (2) in the field, the loud calls of these three species are diagnostic and remain the best means for identification; (3) there is a suite of phenotypic characters that, when taken together, can be used to distinguish among these three species when in the hand or viewed in the field in good light at close range; (4) G. z. zanzibaricus is phenotypically distinct from G. z. udzungwensis; (5) the three species are parapatric or, perhaps, narrowly sympatric; (6) the three species are endemic to the coastal forests of eastern Africa with G. cocos in the north (Kenya and northeastern Tanzania), G. zanzibaricus in Tanzania, and G. granti from southern Tanzania to southern Mozambique; and (7) none of the three species is threatened at this time, although G. z. zanzibaricus meets the IUCN Red List criteria for an Endangered subspecies.

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