Range-extension of black-fronted duiker (Cephalophus nigrifrons Gray 1871, Artiodactyla Bovidae): first records from Nigeria

C.B. POWELL, P. GRUBB

Abstract


The black-fronted duiker (Cephalophus nigrifrons) was previously known
only from Central Africa. A geographically isolated population has now been
found in a small area of the Niger Delta, 500 km from its previously known distribution.
It is locally common in the marsh forest zone but has become extinct
in some districts. The Nigerian population is indistinguishable from the nominate
subspecies C. n. nigrifrons. Its discovery adds to the list of endemic taxa
and isolated populations of otherwise widespread species restricted to southern
Nigeria. This faunal element may have survived adverse environmental perturbations
in a refuge focused on the Niger Delta during the high-latitude glaciations.
KEY WORDS: black-fronted duiker, Cephalophus nigrifrons, Niger Delta, Nigeria,
zoogeography.

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