Nouvelle contribution à la connaissance des rongeurs du massif guinéen des monts Nimba (Afrique occidentale). Systématique et aperçu quantitatif

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Abstract
In December 1983, 102 Rodents of 12 genera and 15 species, have been collected at Mt Nimba (Guinea). All the animals, alive or dead, have been trapped or caught by and in three habitats; piedmont savanna (1600 m) and rain forest. Gerbillidae are represented by one species of Tatera with 2N = 46 chromosomes and which may be related to the group "hopkinsoni". The insectivorous Murid Lophuromys sikapusi with 2N = 64 differs from the Lophuromys studied in Ivory Coast by Matthey. Malacomys longipes is new for Mt Nimba; so is Mylomys dybowskyi (2N = 42) which has been caught in the highland grassland at 1600 m. Only Hybomys planifrons has been collected, not H. trivirgatus which is known from the north of the country. The authors - and others - suggest that these two Hybomys are good species. Praomys tullbergi and P. rostratus have the same ecologies as elsewhere in Ivory Coast. Ground Rodents show patterns of abundance similar to those already described elsewhere in wet open habitats but densities in the forest seem higher in Mt Nimba than in lower Ivory Coast. Species richness of the Guineo-Liberian Nimba (28 species of Rodents) is higher than that of two forest localities from Guinea, and all localities studied in Ivory Coast.

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