Digestive and Reproductive systems of Elysia siamensis Swennen, 1997 (Opisthobranchia: Sacoglossa: Elysiidae)

Abstract

Elysia siamensis Swennen, 1997 is the small Elysiidae which has been found on seagrass in Pattani Bay, Gulf of Thailand. The digestive and reproductive systems of these species were described from the dissected specimens whereas the radular teeth, pharynx and penis were reported earlier. Striking details was the inserted and expanded of the flat branches of the digestive glands in between the hermaphrodite glands. Moreover, the gametolytic vesicle (bursa copulatrix) had a great in size, a bursa copulatrix and ampulla attached to the hermaphrodite duct before separating to the male and female duct.