Marphysa

• Marphysa ibaiensis

  The front of the body is cylindrical, with a shallow groove through the middle region; farther back, the body is flattened and narrows toward the rear. Live specimens are red. Eyes are absent from the prostomium. The Kuala Ibai records describe specimens in slightly gravelly sand around oyster clumps among Rhizophora mangroves. They also report worms burrowing in sediment inside driftwood bark. It is known only from the original collection area, including the Kuala Ibai River estuary and lagoon.

• Marphysa kertehensis

  The body is rounded in cross-section in the front and middle, then flattened from back to belly farther back. Five unjointed appendages form a semicircle on the head. Live specimens are red. Collection records describe specimens in gravelly muddy sand in mangrove intertidal habitat, burrowing inside driftwood. It is known only from the original collection area at Kerteh River, Terengganu, Malaysia.

• Marphysa merchangensis

  The front of the body has a convex back and a flat underside. Live specimens are pink with red branchiae. The described specimen has a pair of faded brown eyes near the back of the head. At Merchang mangrove estuary, the account reports worms from gravelly or slightly gravelly sand, burrowing in decayed roots of E. agallocha and in sediment where Talipariti tiliaceum grows. It is known from Merchang estuary and Setiu Wetlands in Terengganu, Malaysia.