A New Gastrotrich Species of the Genus Ptychostomella (Macrodasyida, Thaumastodermatidae) from South Korea

  • Lee, Ji-Min (Institute of Basic Science, Daegu University) ;
  • Hwang, Ui-Wook (Department of Biology, Teachers College, Kyungpook National University) ;
  • Chang, Cheon-Young (Department of Biological Science, College of Natural Sciences, Daegu University)
  • 발행 : 2009.03.31

초록

A new marine gastrotrich species, Ptychostomella jejuensis n. sp. belonging to the family Thaumastodermatidae, is described on the basis of the specimens from subtidal sand bottom at about 6-7 m depth of Jeju Island, South Korea. Ptychostomella jejuensis n. sp. is distinguished from its congeneric species with smooth cuticular armature by the character combination: (1) small body up to about 160 ${\mu}m$ in length; (2) presence of knob-like cephalic tentacles; (3) absence of dorsal and ventral adhesive tubes; (4) bifid pedicles; (5) pyriform copulatory organ. Under scanning electron microscopy, numerous epidermal gland openings were observed in the new species, characteristically flanking a bristle. Taxonomic accounts on the affinities, some brief remarks on the epidermal gland openings and the cooccurrence with P. orientalis Lee and Chang, 2003 are also presented with detailed illustrations and scanning electron photomicrographs.

키워드

참고문헌

  1. Chang CY, Lee JM, and Clausen C (1998a) Description of two new species thaumastodermatids (Gastrotricha, Macrodasyida) from Korea. Korean J Biol Sci 2: 315-321 https://doi.org/10.1080/12265071.1998.9647425
  2. Chang CY, Lee JM, and Clausen C (1998b) Two new species of Thaumastoderma (Gastrotricha, Macrodasyida) from Korea. Sarsia 83: 329-336 https://doi.org/10.1080/00364827.1998.10413692
  3. Chang CY and Lee JM (2001) Two new Tetranchyroderma gastrotrichs (Macrodasyida Thaumastodermatidae) from South Korea. Korean J Biol Sci 5: 187-194 https://doi.org/10.1080/12265071.2001.9647601
  4. Clausen C (2000) Gastrotricha Macrodasyida from the Troms$\phi$ region, northern Norway. Sarsia 85: 357-384 https://doi.org/10.1080/00364827.2000.10414588
  5. Clausen C (2004) Gastrotricha from the Faroe Bank. Sarsia 89: 423-458 https://doi.org/10.1080/00364820410002677
  6. Hummon WD, Todaro MA, and Tongiorgi P (1993) Italian marine Gastrotricha: II. One new genus and ten new species of Macrodasyida. Boll Zool 60: 109-127 https://doi.org/10.1080/11250009309355798
  7. Lee JM and Chang CY (2002) Pseudostomella gastrotrichs (Macrodasyida, Thaumastodermatidae) from South Korea, with a brief review of the genus. Korean J Biol Sci 6: 207-213 https://doi.org/10.1080/12265071.2002.9647653
  8. Lee JM and Chang CY (2003) Two new marine gastrotrichs of the genus Ptychostomella (Macrodasyida, Thaumastodermatidae) from South Korea. Zool Sci 20: 481-489 https://doi.org/10.2108/zsj.20.481
  9. Lee JM and Chang CY (2004) Gastrotrichs of genus Halichaetonotus (Chaetonotida: Chaetonotidae) from Korea. Korean J Syst Zool 20(1): 55-62
  10. Lee JM and Chang CY (2006) Marine gastrotrichs of the genus Diplodasys (Macrodasyida: Thaumastodermatidae) from Korea. Korean J Syst Zool 22(1): 109-115
  11. Lee JM and Chang CY (2007) Two new marine gastrotrichs of the genus Tetranchyroderma (Macrodasyida: Thaumastodermatidae) from South Korea. Zool Stud 46(4): 474-482
  12. Ruppert EE (1991) Gastrotricha. In: Harrison FW and Ruppert EE (eds), Microscopic Anatomy of Invertebrates, IV: Aschelminthes, John Wiley & Sons, New York, pp 41-109
  13. Todaro MA (2002) An interesting new gastrotrich from littoral meiobenthos (Long Beach Island, USA), with a key to species of Tetranchyroderma (Gastrotricha: Macrodasyida). J Mar Biol Assoc UK 82: 555-563 https://doi.org/10.1017/S0025315402005878