Animal Systematics, Evolution and Diversity

The Korean Society of Systematic Zoology (한국동물분류학회)
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Taxonomic Study of Marine Tardigrades from Korea III. A New Species of the Genus Orzeliscus (Heterotardigrada, Halechiniscidae)

  • Lee, Jimin (Marine Ecosystem and Biological Research Center, Korea Institute of Ocean Science & Technology) ;
  • Rho, Hyun Soo (Dokdo Research Center, Korea Institute of Ocean Science & Technology) ;
  • Chang, Cheon Young (Department of Biological Science, College of Natural Sciences, Daegu University)
  • Received : 2016.12.11
  • Accepted : 2017.01.02
  • Published : 2017.01.31
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Abstract

A new marine tardigrade species of the genus Orzeliscus belonging to the family Halechiniscidae is described from the sea coasts of Korea and Japan. This new species is most characterized in having slender, pole-shaped clava with uniform breadth along its whole length. Furthermore, it evidently differs from the congeners by the combination of characters of a hemispherical protrusion on cheek region of the head, a big and bulbous lateral projection between leg III and leg IV, and an elongate papillus terminating with a minute tube on leg IV. 'Orzeliscus cf. belopus' sensu McKirdy, Schmidt and McGinty-Bayly, 1976 from the Galapagos Islands quite resembles this new species in sharing the slender, pole-shaped clava. However, these two Pacific populations are distinguished to each other by body size and shapes of the protrusion on cheek region and the lateral projection between leg III and leg IV. Scanning electron microscope photographs and a key to species of the genus Orzeliscus are also provided herein.

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References

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