Echinoderes rex n. sp. (Kinorhyncha: Cyclorhagida), the largest Echinoderes species found so far

Authors

  • Henriette Lundbye Zoological Museum, The Natural History Museum of Denmark, University of Copenhagen
  • Hyun Soo Rho Dokdo Research Center, Korea Ocean Research and Development Institute
  • Martin Vinther Sørensen Zoological Museum, The Natural History Museum of Denmark, University of Copenhagen

DOI:

https://doi.org/10.3989/scimar.2011.75n1041

Keywords:

Echinoderidae, Korea Strait, meiofauna, morphology, new species

Abstract


A new kinorhynch species, Echinoderes rex n. sp., is described from the Korea Strait. The new species is characterized by a pair of diminutive lateral terminal spines (19-23 μm) and a trunk length of 482-528 μm, making it the largest Echinoderes described so far. Unique for the new species is also the presence of a type of putative glandular cell outlets that have not been described previously. This paper presents light and scanning electron micrographs of the new structure. In addition, E. rex n. sp. is characterized by having a single middorsal spine on segment 4, lateroventral tubules on segment 5 and 8 and lateroventral acicular spines on segments 6 and 7. A pair of distinct and conspicuously large sieve plates, only described from two other species of the genus, is present on segment 9 in E. rex n. sp. A comparison is made with other species of Echinoderes and the similarities are discussed.

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References

Adrianov, A.V. and V.V. Malakhov. – 1999. Cephalorhyncha of the world ocean. KMK Scientific Press, Moscow.

Brown, R. – 1985. Developmental and taxonomic studies of Sydney Harbour Kinorhyncha. Ph.d. thesis, Macquarie Univ.

Burgess, R. – 2001. An improved protocol for separating meiofauna from sediments using colloidal silica sols. Mar. Ecol. Prog. Ser., 214: 161- 165. doi:10.3354/meps214161

GaOrdóñez, D., F. Pardos and J. Benito. – 2007. Three new Echinoderes (Kinorhyncha, Cyclorhagida) from North Spain, with new evolutionary aspects in the genus. Zool. Anz., 247: 95-111. doi:10.1016/j.jcz.2007.07.001

Higgins, R.P. – 1977. Two new species of Echinoderes (Kinorhyncha) from South Carolina. Trans. Am. Micros. Soc., 96: 340-354. doi:10.2307/3225864

Higgins, R.P. – 1990. Zelinkaderidae, a New Family of Cyclorhagid Kinorhyncha. Smithson. Contrib. Zool., 500: 1-26.

Kristensen, R.M. and R.P. Higgins. – 1984. Revision of Styraconyx (Tardigrada: Halechiniscidae), with description of two new species from Disko Bay, West Greenland. Smithson. Contrib. Zool., 391: 1–40.

Kristensen, R.M. and R.P. Higgins. – 1991. Kinorhyncha. In: F. W. Harrison and E. E. Ruppert (eds.), Microscopic anatomy of invertebrates, Vol. 4, The Aschelminthes, pp. 377-404. Wiley-Liss, New York.

Nebelsick, M. – 1992. Ultrastructural investigations of three taxonomic characters in the trunk region of Echinoderes capitatus (Kinorhyncha, Cyclorhagida). Zool. Scr., 21: 335-345. doi:10.1111/j.1463-6409.1992.tb00335.x

Neuhaus, B. and T. Blasche. – 2006. Fissuroderes, a new genus of Kinorhyncha (Cyclorhagida) from the deep sea and continental shelf of New Zealand and from the continental shelf of Costa Rica. Zool. Anz., 245: 19-52. doi:10.1016/j.jcz.2006.03.003

Neuhaus, B. and R.P. Higgins. – 2002. Ultrastructure, biology and phylogenetic relationships of Kinorhyncha. Int. Comp. Biol., 42: 619-632. doi:10.1093/icb/42.3.619

Nicholas, W. and M. V. Sørensen. – 2009. Kinorhynchs from sea-grass beds in south eastern Australia – with notes on a new collecting method. Wetlands (Australia) 25: 20-24.

Omer-Cooper, J. – 1957. Deux nouvelles especes de Kinorhyncha en provenance de L’Afrique du Sud. Bull. Mens. Soc. Linn. Lyon, 26: 213-216.

Pardos, F., R.P. Higgins and J. Benito. – 1998. Two New Echinoderes (Kinorhyncha, Cyclorhagida) from Spain, Including a Reevaluation of Kinorhynch Taxonomic Characters. Zool. Anz., 237: 195-208.

Sørensen, M.V. – 2008. A new kinorhynch genus from the Antarctic deep-sea and a new species of Cephalorhyncha from Hawaii (Kinorhyncha: Cyclorhagida: Echinoderidae). Org. Div. Evol. 8: 230e1-230e18.

Sørensen, M.V. and F. Pardos. – 2008. Kinorhynch systematics and biology – an introduction to the study of kinorhynchs, inclusive identification keys to the genera. Meiofauna Mar., 16: 21-73.

Zelinka, K. – 1928. Monographie der Echinodera. Verlag von Wilhelm Engelmann, Leipzig.

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Published

2011-03-30

How to Cite

1.
Lundbye H, Soo Rho H, Vinther Sørensen M. Echinoderes rex n. sp. (Kinorhyncha: Cyclorhagida), the largest Echinoderes species found so far. Sci. mar. [Internet]. 2011Mar.30 [cited 2024Mar.28];75(1):41-5. Available from: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1211

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