Two New Species of Dorid Nudibranchs (Gastropoda, Opisthobranchia) from the Indian Ocean

Two new species of cryptobranch dorid nudibranchs are described from the Indian Ocean. Chromodoris cazae sp. nov. is known from the United Arab Emirates, Gulf of Oman. This species is characterized by having a smooth white body with several irregular patches of deep red-maroon found scattered on the mid-dorsal region. Each of these patches has a number of smaller irregular orange spots within it. Aldisa andersoni sp. nov. is found from Sri Lanka. This species has a series of rows of low tubercles on the blue dorsum. Black pigmentation demarcates the rows of tubercles. The species also has an opaque yellow saddle posterior to the rhinophores, and other yellow marks on the dorsum. Other species having similar coloration and that also appear to mimic phyllidid nudibranchs are discussed. Both species are distinguished from other described taxa based on differences in body coloration and external and internal morphology and anatomy.