Abstract
Abstract: Seven species of terrestrial isopods are recorded from the coasts of the Pacific and Caribbean sides of Costa Rica. Three species (Buchnerillo neotropicalis, Hawaiioscia nicoyaensis and Trichorhina biocellata) are described as new and two species (Tylos niveus and Armadilloniscus cf. caraibicus) are newly recorded from the country. The poorly known species T. niveus is also illustrated. At present the total number of terrestrial isopod species recorded from Costa Rica is 30. Interestingly four typical littoral halophilic species (Ligia baudiniana, Tylos wegeneri, T. niveus and A. cf. caraibicus) are present on both the Pacific coast of Costa Rica and on the coasts of the lands encompassed by the Caribbean Sea. With the sole exception of A. cf. caraibicus, no morphological differences could be detected from the Pacific and Caribbean populations of those species. Rev. Biol. Trop. 66(Suppl. 1): S187-S210. Epub 2018 April 01.
Highlights
Up to date, the diversity of Costa Rican terrestrial isopods is poorly known
At present the total number of terrestrial isopod species recorded from Costa Rica is 30
Four typical littoral halophilic species (Ligia baudiniana, Tylos wegeneri, T. niveus and A. cf. caraibicus) are present on both the Pacific coast of Costa Rica and on the coasts of the lands encompassed by the Caribbean Sea
Summary
The diversity of Costa Rican terrestrial isopods is poorly known. Only 25 species in 16 genera and 10 families are presently recorded, numbers that are certainly very small for a tropical country like Costa Rica. At present the total number of terrestrial isopod species recorded from Costa Rica is 30. For each species already recorded from Costa Rica the bibliographic references, material examined, distribution and remarks (when necessary) are included.
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