Sylvisorex isabellae Heim de Balsac 1968
Sylvisorex isabellae Heim de Balsac 1968, Bonn. Zool. Beitr., Vol. 19: 31.
Type Locality: Equatorial Guinea, Bioko (Fernando Po), Pic Santa Isabel, Refugium, 2000 m.
Vernacular Names: Bioko Forest Shrew.
Distribution: Bioko; a similar form of unsolved taxonomic status occurs in the Bamenda Highlands, Cameroon.
Conservation: IUCN – Vulnerable.
Discussion: Included in morio by Heim de Balsac and Meester (1977), but represents a distinctly smaller species. Karyotype (2n = 36, FN = 50) of the Bamenda population described by Schlitter et al. (1999).