Ceylonthelphusa alpina is a species of freshwater crabs in the family Gecarcinucidae. The species is endemic to Sri Lanka, and is classed as an endangered due to habitat degradation.
Ceylonthelphusa is a genus of freshwater crabs endemic to Sri Lanka, where they live in moist lowland forests, swamps and rivers. Many of the species are on the IUCN Red List of threatened species, with the greatest risk factor being habitat loss. Ceylonthelphusa contains these species:
Ceylonthelphusa armata is a species of freshwater crabs in the family Gecarcinucidae. The species is endemic to Sri Lanka, and is classed as an endangered due to habitat degradation.
Ceylonthelphusa callista is a species of freshwater crabs in the family Gecarcinucidae. The species is endemic to Sri Lanka and is known from the Knuckles Mountain Range. It was found on wet boulders on the margins of a slow-flowing stream at an elevation of 915 m (3,000 ft) above sea level.
Ceylonthelphusa diva is a species of decapod in the family Gecarcinucidae.
Ceylonthelphusa durrelli is a species of decapod in the family Gecarcinucidae. It is native to Central Province, Sri Lanka.
Ceylonthelphusa kandambyi is a species of decapod in the family Gecarcinucidae.
Ceylonthelphusa kotagama is a species of decapod in the family Gecarcinucidae.
Ceylonthelphusa nata is a species of crab in the family Gecarcinucidae.
Ceylonthelphusa orthos is a species of crab 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 sentosa 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 crab in the family Gecarcinucidae.
Clinothelphusa kakoota is a species of crab in the family Gecarcinucidae, which is endemic to Sri Lanka. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical swamps, and rivers. It is threatened by habitat loss, and is listed as a critically endangered species on the IUCN Red List. It is known from a single site with an area of less than 100 km2 (39 sq mi). Its nearest relatives are another Sri Lankan endemic genus of crabs, Ceylonthelphusa.
Mahatha is a genus of freshwater crabs endemic to Sri Lanka. Four of the six species are critically endangered due to habitat loss, and two are listed as Least Concern on the IUCN Red List.
Ceylonthelphusa cavatrix is a species of decapod in the family Gecarcinucidae.
Haliotis rugosa, common name the many-holed abalone, is a species of sea snail, a marine gastropod mollusk in the family Haliotidae, the abalones.
