Phenganax marumi

Description. Colony is attached to rock and sponge and consists of ~ 15 polyps. Stolons are consistent in width throughout the colony (~ 0.35 mm). Polyps are spaced apart irregularly (from 0.5 mm up to 6 mm) and retract fully into calyces; calyces do not retract into stolon and are approximately 1 mm in width and 2 mm in height. Expanded polyps 4.0 - 5.5 mm in width. The pinnules are arranged on either side of the rachis in pairs of 12 - 15, sometimes spaced apart irregularly. The pinnules give a swollen appearance and are mostly conical shaped, otherwise diamond-shaped. The colony is sclerite-free. Polyps are brownish yellow in colour, with a bright yellowish white oral disk in life (whitish yellow when preserved in ethanol). Tentacles have a greenish colour interrupted with brown specks. Zooxanthellate.

Distribution. Gaya, Sapi and Manukan Islands, TARP, Kota Kinabalu, Sabah, Malaysia.

Etymology. From the Japanese word marumi, which means round or rounded; denoting the plump shape of the polyp tentacles, which give the polyp an overall plump appearance.

Material examined. All specimens are from Kota Kinabalu, Sabah, Malaysia and collected by YW Lau. Holotype: NSMT-Co 1683, Manukan, Manukan Island, TARP (05 ° 58 ' 46.1 " N, 116 ° 00 ' 10.6 " E), 13 m depth. Paratypes: IPMB-C 01.00001: Edgell Patches, west of Sapi Island (06 ° 00 ' 38.7 " N, 115 ° 59 ' 22.2 " E), 16 m depth. IPMB-C 01.00002: Mid Reef Slope, east of Manukan Island, TARP (05 ° 58 ' 38.08 " N, 116 ° 00 ' 52.82 " E), 13 m depth. IPMB-C 01.00003: Mid Reef Slope, east of Manukan Island, TARP (05 ° 58 ' 38.08 " N, 116 ° 00 ' 52.82 " E), 11 m depth. IPMB-C 01.00004: Edgell Patches, west of Sapi Island (06 ° 00 ' 38.7 " N, 115 ° 59 ' 22.2 " E), 19 m depth. IPMB-C 01.00005: Edgell Patches, west of Sapi Island (06 ° 00 ' 38.7 " N, 115 ° 59 ' 22.2 " E), 16 m depth. IPMB-C 01.00006: Gaya Clement Reef, west of Gaya Island, TARP (06 ° 01 ' 24.26 " N, 116 ° 00 ' 13.55 " E), 12 m depth. IPMB-C 01.00007: Gaya Clement Reef, west of Gaya Island, TARP (06 ° 01 ' 24.26 " N, 116 ° 00 ' 13.55 " E), 11 m depth. IPMB-C 01.00008: Manukan, north of Manukan Island, TARP (05 ° 58 ' 46.1 " N, 116 ° 00 ' 10.6 " E), 12 m depth. IPMB-C 01.00009: Manukan, Manukan Island, TARP (05 ° 58 ' 46.1 " N, 116 ° 00 ' 10.6 " E), 12 m depth. IPMB-C 01.00010: Manukan, Manukan Island, TARP (05 ° 58 ' 46.1 " N, 116 ° 00 ' 10.6 " E), 12 m depth.