Two New Tetranchyroderma Gastrotrichs(Macrodasyida, Thaumastodermatidae) from South Korea

  • Chang, Cheon-Young (Department of Biology, College of Natural Sciences, Taegu University) ;
  • Lee, Ji-Min (Department of Biology, College of Natural Sciences, Taegu University)
  • Published : 2001.09.01

Abstract

Two new gastrotrich species belonging to genus Tetranchyroderma are described on the basis of the specimens from intertidal or sublittoral sand bottoms of South Korea. Tetranchyroderma heterotentaculatum, n. sp. is clearly differentiated from its congeners by the character combination: the cuticular armature with pentancres, modified rod-like cephalic tentacles, and three pairs of dorsolateral adhesive tubes. Tetranchyroderma hoonsooi, n. sp. possesses tetrancres, paired lateral cephalic tentacles, and ventro-lateral adhesive tubes along whole lateral margin, while lacks dorsal adhesive tubes. Affinities with its congeners and variability within the species are discussed, with brief notes on morphological discrepancies between adults and juveniles.

References

  1. Chang CY, Lee JM, and Clausen C (1998a) Two new species of Thaumastoderma (Gastrotricha, Macrodasyida) from Korea. Sarsia 83: 329-336
  2. Chang CY, Lee JM, and Clausen C (1998b) Description of two new species thaumastodermatids (Gastrotricha, Macrodasyida) from Korea. Korean J Biol Sci 2: 315-321
  3. Clausen C (1965) Tetranchyroderma tribolosum sp. n., a marine gastrotrich with triancres. Sarsia 20: 9-13
  4. Clausen C (2000) Gastrotricha Macrodasyida from the Troms region, northern Norway. Sarsia 85: 357-384
  5. Remane A (1926) Morphologie und Werwandtschaftsbeziehungen der aberranten Gastrotrichen. I. Z. Wiss 5: 625-754
  6. Ruppert EE (1991) Gastrotricha. In: Harrison FW and Ruppert EE(eds), Microscopic Anatomy of Invertebrates. 4. Aschelminthes. John Wiley & Sons, New York, pp. 41-109
  7. Saito I (1937) Neue und bekannte Gastrotrichen der Umgebung von Hiroshima (Japan). J Sci Hiroshima Univ 5: 245-265
  8. Shirayama Y, Kaku T, and Higgins RP (1993) Double-slided microscopic observation of meiofauna using an HS-slide. Benthos Res 44: 41-44
  9. Valbonesi A and Luporini P (1984) Researches on the coast of Somalia. Gastrotricha Macrodasyoidea. Monit Zool Ital Suppl 19: 1-34