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Halgerda dalanghita Fahey & Gosliner, 1999, a discodoridid nudibranch was reported from Havelock Island of Ritchieâ€™s Archipelago representing a new addition to the Opisthobranch fauna of India. This species is characterized by a firm, bright orange coloured mantle with a network of angular ridges on the dorsum that is ornate with white lines and dots; rhinophores with 17 brown lamellae on a translucent white stalk; highly pinnate gills with eight branchial leaves. The present record extends the known geographical distribution of H. dalanghita and this is the sixth species representing the genus in India.Â
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