Gymnodoris ceylonica is a species of sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Polyceridae.
Naria nebrites, common name the false margined cowry, is a species of sea snail, a cowry, a marine gastropod mollusk in the family Cypraeidae, the cowries.
Ropica ceylonica is a species of beetle in the family Cerambycidae. It was described by Breuning in 1939.
Prenolepis ceylonica is a species of ant in the subfamily Formicinae. It is found in Philippines, India, Bangladesh, Sri Lanka, and China.
Colobopsis ceylonica is a species of formicine ant. It is found from Sri Lanka.
Pheidole ceylonica is a species of ants in the subfamily Myrmicinae. It is found in Sri Lanka.
Moechotypa ceylonica is a species of beetle in the family Cerambycidae. It was described by Stephan von Breuning in 1938. It is known from Sri Lanka.
Helsdingenia ceylonica, is a species of spider of the genus Helsdingenia. It is found only in Nepal and Sri Lanka.
Phrynarachne ceylonica is a species of spiders of the genus Phrynarachne. It is found in China, Japan, Sri Lanka and Taiwan. The species is known to discharge foul smell, which may help it attract prey and deter predators. Its morphology is similar to bird's dung, and hence its common name. This strategy is used by the spider to catch prey who thinks that it is actually dung, not an animal.
Ceylania ceylonica is a species of beetle in the family Cerambycidae, and the type species of its genus. It was described by Stephan von Breuning in 1979. It is known from Sri Lanka.
Falsomesosella ceylonica is a species of beetle in the family Cerambycidae. It was described by Stephan von Breuning in 1974.
Pterolophia ceylonica is a species of beetle in the family Cerambycidae. It was described by Stephan von Breuning in 1938.
Parasosibia ceylonica, is a species of phasmid or stick insect of the genus Parasosibia. It is found in Sri Lanka.
Sipyloidea ceylonica, is a species of phasmid or stick insect of the genus Sipyloidea. It is found in Sri Lanka.
Serixia ceylonica is a species of beetle in the family Cerambycidae. It was described by Stephan von Breuning in 1958.
Oxymacaria ceylonica is a moth of the family Geometridae first described by George Hampson in 1902. It is found in Sri Lanka.
Cricula ceylonica, the Sri Lankan cricula silkmoth, is a moth of the family Saturniidae. The species was first described by Jordan in 1909 and it is endemic to Sri Lanka. The debate of this species with much broader range circular species - Cricula trifenestrata is not yet fully understood. However, Rougerie et al., in 2009 considered Cricula ceylonica a valid species, probably endemic to Sri Lanka.
Mimeusemia ceylonica is a moth of the family Noctuidae first described by George Hampson in 1893. It is found in Sri Lanka.
Aposthonia ceylonica is a species of webspinner of the family Oligotomidae native to tropical Asia, Madagascar and Mauritius. In February 2019, a colony of this insect was identified in a greenhouse at the RHS Garden, Wisley, Surrey, England, on the roots of an orchid. It was thought that the insects had been accidentally introduced on plants imported from Thailand.
