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During recent investigations of the groundwater fauna of Cameroon, specimens of a new species of the stygobitic genus    Metastenasellus   ,    M.   boutini    sp. nov. were collected in wells of the city of Douala. The new species can be easily distinguished from the other species of the genus by its relatively large size (up to 11 mm), pleonite 1 and 2 half the length of pereonite 7, the shape of pleopod 2 in males (presence of an external lobe on the protopodite, distal part of the spermatic duct slightly protruding out of the second article, lack of a distal seta on the exopodite), and uropod half the length of the pleotelson. Ecological data and a key to    Metastenasellus    species are provided. We also performed an exhaustive analysis of the literature on   Stenasellidae   in Africa to study the geographical distribution of the family in this continent and discuss some hypotheses about the origin of African species.

﻿Distribution of Stenasellidae in Africa and description of a new species of Metastenasellus from Cameroonian groundwaters

Distribution of Stenasellidae in Africa and description of a new species of Metastenasellus from Cameroonian groundwaters