Ceylonthelphusa alpina

{{Short description|Species of crab}}

{{Speciesbox

| status = EN

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Bahir, M.M. |author2=Ng Kee Lin, P. |author3=Crandall, K.A. |author4=Pethiyagoda, R. |author5=Cumberlidge, N. |date=2008 |title=Ceylonthelphusa alpina |volume=2008 |page=e.T61690A12525900 |doi=10.2305/IUCN.UK.2008.RLTS.T61690A12525900.en |access-date=12 November 2021}}

| genus = Ceylonthelphusa

| species = alpina

| authority = (Bahir & Ng, 2005)

}}

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.