A new species of the genus Parathalestris (Copepoda: Harpacticoida: Thalestridae) from dead staghorn corals on Tao Island, southern Thailand

作者：Chullasorn Supawadee^*; Kangtia Pawana; Song Sung Joon^*

来源：Raffles Bulletin of Zoology, 2016, 64: 343-350.

• Taxonomy
• Parathalestris
• staghorn corals
• Tao Island
• southern Thailand

A new harpacticoid species of the genus Parathalestris Brady & Robertson, 1873 was collected from dead staghorn corals (Acropora spp.) on Tao Island in Surat Thani Province, southern Thailand. Specimens of both sexes of Parathalestris yeemini, new species, are described herein. Sexual dimorphism is expressed in the antennules, P1, P2, P5, P6 and urosomites. Parathalestris yeemini, new species, is most closely related to P. parviseta Chang & Song, 1997 from Korea and P. mourei Masunari, 1988 from Brazil in sharing nine-segmented female antennule, specific structure of female genital field, P1 basis of male blunt, curved, and directed upwards, and P2 endopod II of male strongly modified. However, it can be easily distinguished by the body shape which is more robust, ornamented with more fine spinules and sensillae; female with pores close to distal margin of exp III and enp III of P2-P4. Female P5 of the new species has five marginal smooth setae on baseoendopod, of which the innermost one is separated much further from others than in P. parviseta and P. mourei. P5 exopod of female has six marginal smooth setae, of which 2nd, 3rd, and 6th setae are small and strong, while there are 5 long marginal setae in P. parviseta and P. mourei. Caudal seta V is slightly swollen at base. These characters are suggested as autapomorphies of the new species.

• 出版日期2016