Ceylonthelphusa kotagama is a species of decapod in the family Gecarcinucidae.
Ceylonthelphusa orthos is a species of decapod in the family Gecarcinucidae.
Ceylonthelphusa sanguinea is a species of decapod in the family Gecarcinucidae.
Ceylonthelphusa savitriae is a species of decapod in the family Gecarcinucidae.
Ceylonthelphusa soror is a species of decapod in the family Gecarcinucidae.
Ceylonthelphusa venusta is a species of decapod in the family Gecarcinucidae.
Perbrinckia cracens is a species of decapod in the family Gecarcinucidae.
Perbrinckia is a genus of freshwater crabs of the family Gecarcinucidae that is endemic to Sri Lanka, named after Per Brinck. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical swamps, and rivers. It contains 14 species, most of which are included on the IUCN Red List as critically endangered species (CR) or vulnerable species (VU) because they are threatened by habitat loss; only one species is of least concern (LC).
Perbrinckia enodis is a species of decapod in the family Gecarcinucidae.
Perbrinckia fido is a species of decapod in the family Gecarcinucidae.
Perbrinckia punctata is a species of decapod in the family Gecarcinucidae.
Perbrinckia quadratus is a species of decapod in the family Gecarcinucidae.
Perbrinckia rosae is a species of decapod in the family Gecarcinucidae.
Spiralothelphusa fernandoi is a species of decapod in the family Gecarcinucidae.
Spiralothelphusa parvula is a species of decapod in the family Gecarcinucidae.
Perbrinckia glabra is a species of freshwater crab of the family Gecarcinucidae that is endemic to Sri Lanka. The species is categorized as critically endangered by the IUCN Red List due to their single locality in Horton Plains National Park. Perbrinckia glabra is found primarily under rocks and boulders near shallow streams. Major threats to this species include habitat loss and pollution.
Perbrinckia scitula is a species of freshwater crabs of the family Gecarcinucidae that is endemic to Sri Lanka. the species is categorized as critically endangered by founders due to their two localities where not protected by law. Very small number can be found among human habitations. The species distributed along Mahaweli River basin, around Deltota and Talawakelle areas.
The Sri Lanka tree crab,, is a species of freshwater crabs of the family Gecarcinucidae that is endemic to Sri Lanka. It is the only known tree climbing freshwater crab found in the country. The crab is discovered from 11 localities from Sri Lanka throughout Kalu River, Walawe River and Gin River basins. Adult are known to survive well in rainwater-filled tree hollows of trees such as Shorea sp., Artocarpus sp., Dillenia sp., Garcinia sp., Myristica sp., and Gyrinops walla. Females with youngs can be seen during February and March on the ground, never within tree hollows. The known predators are Greater coucal, White-throated kingfisher, Sri Lanka grey hornbill and Eurasian otter.
