From now on, the genus Bragasellus Henry & Magniez, 1968 includes 2 oculated and 17 stygobiotic species. As a natural and monophyletic taxonomic unit, we consider it a good genus. Its original area corresponds to the north-west quarter of the Iberian Peninsula. Secondarily, this area has extended eastward, using mainly the alluvial channels of hydrographic systems (Ríos Douro + Ebro and tributaries), finally reaching the underground waters of several Mediterranean rivers. This active expansion is exclusively due to the migration of two stygobiotic sibling species: B. lagari Henry & Magniez, 1973 towards the high basin of the Río Tajo, then downstream to the basins of the Ríos Jucar and Turia (Prov. Valencia); and B. lagarioides n. sp., downstream the Río Ebro basin, towards the Río Gaya basin (Prov. Tarragona).

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Contributions to Zoology

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Naturalis journals & series

Afonso, O., Henry, J.-P., & Magniez, G. (1996). Nouvelles données sur le genre Bragasellus (Crustacea: Isopoda: Asellidae). Contributions to Zoology, 66(2), 109–118.