Two new species of sea cucumbers (Echinodermata: Holothuroidea) from the seagrass meadow of Penang, Malaysia Author Teoh, Vincent Yong Jian Author Woo, Sau Pinn Corresponding: woosaupinn @ usm. my text Zootaxa 2022 2022-04-19 5128 1 107 118 journal article 55854 10.11646/zootaxa.5128.1.6 1d4bdfae-b87b-4824-afa7-049177f8fad0 1175-5326 6479636 6BB58C2A-323F-4DE4-A0CA-3140428D1D3B Identification key to the genus Acaudina 1. Presence of doughnut-shaped bodies….................................................................... 2 - Absence of doughnut-shaped bodies….................................................................... 5 2. Doughnut-shaped bodies spinose........................................................ … A. spinifera sp. nov. - Doughnut-shaped bodies smooth…....................................................................... 3 3. Perforated plates either spinose or smooth….................................................... A. molpadioides - Perforated plates always smooth…....................................................................... 4 4. Rod ossicles may have branched ends…........................................................... A. punctata - Rod ossicles without branched ends….......................................................... A. leucoprocta 5. Ossicles absent…............................................................................ A. pellucida - Ossicles present.................................................................................... …6 6. Rosette present in body wall….................................................................... A. rosettis - Rosette absent in body wall…........................................................................... 7 7. Spinose subspherical ossicles present in body wall…................................................. A. demissa - Spinose subspherical ossicles absent in body wall….......................................................... 8 8. Rod ossicles dominant in body wall; may be smooth or spinose........................................ … A. bacilla - Spinose perforated plates dominant in body wall; rod ossicles always finely spinose…...................... A. suspecta