Rhodactis inchoata Carlgren, 1943

Oh, Ren Min, Neo, Mei Lin, Yap, Nicholas Wei Liang, Jain, Sudhanshi Sanjeev, Tan, Ria, Chen, Chaolun Allen & Huang, Danwei, 2019, Citizen science meets integrated taxonomy to uncover the diversity and distribution of Corallimorpharia in Singapore, Raffles Bulletin of Zoology 67, pp. 306-321 : 313

Rhodactis inchoata Carlgren, 1943

( Fig. 5 )

Material examined. 1 specimen (syntype), NRS4022 x5, Lien Chien Tourane, Vietnam ; 1 specimen (syntype), NRS4021 x2, Macclesfield Bank, South China Sea ;> 3 specimens, ZRC. CNI.1356 (REL340, REL344, REL375, REL389), Pulau Hantu, Singapore, coll. R. M. Oh, August 2017 – March 2018 ; 2 specimens, ZRC.CNI.1349 (REL347), Sisters’ Islands , Singapore, coll. R. M. Oh, August 2017 – March 2018 ; 1 specimen, ZRC.CNI.1350 (REL372, REL373, REL374), St John’s Island , Singapore, coll. R. M. Oh, August 2017 – March 2018 .

Description. Body oval. Pedal and oral disc very wide. Column reddish-brown to dark purple. Some specimens with longitudinal lines extending from the entire column, of similar colour to discal tentacle tips. Oral disc light green to brown, outline irregular oval, overall flat, with radial ridges along its margin. Discal tentacles arranged in circles of increasing radius, innermost are low star-shaped bumps as depicted in Carlgren (1943), light brown to green. Marginal tentacles simple and more developed. Colours include pale yellow with green tips. No clear space separating marginal from discal tentacles. Central mouth, overall oval and slightly raised. Mesenteries complete. Cnidom atrichs, holotrichs, microbasic b -mastigophores, microbasic p -mastigophores (see Carlgren, 1943).

tightly to coral rock and is difficult to dislodge without damaging the column.

Figures

Fig. 5. Rhodactis inchoata. A, REL340 ex situ; B, REL344 ex situ; C, D, REL347 ex situ. Scale bar = 1 cm.