Animal Systematics, Evolution and Diversity

The Korean Society of Systematic Zoology (한국동물분류학회)
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A New Species of Eudactylopus (Copepoda: Harpacticoida) from the South Coast of Korea Based on Morphological and Molecular Evidence

  • Cho, Dae Hyun (Department of Oceanography, Chonnam National University) ;
  • Wi, Jin Hee (School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology) ;
  • Suh, Hae-Lip (Department of Oceanography, Chonnam National University)
  • Received : 2017.12.04
  • Accepted : 2018.06.08
  • Published : 2018.07.31
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Abstract

A new species of Eudactylopus Scott A., 1909 is described from the southern coast of Korea. The specimens were collected using a light trap set overnight at the entrance near a pier. Eudactylopus yokjidoensis n. sp. is similar to E. andrewi Sewell, 1940 and E. spectabilis (Brian, 1923) in two key respects: similar length of proximal and distal inner setae on female P2 enp-2, and modification of two subapical setae on male P2 endopod. However, E. yokjidoensis can be differentiated from the two species by following morphological characteristics: in females, the length ratio of cephalothorax/2nd-4th thoracic somites combined is smaller in E. yokjidoensis than other two species (1 : 0.8 vs. 1 : 1); antennule has nine segments (vs. 7-segmented in E. andrewi); P2 to P4 each bears a process in medial distal margin of basis, while it is just smooth in E. spectabilis; in males; the length ratio of cephalothorax to 2nd-4th thoracic somites combined is smaller in E. yokjidoensis than other two species (1 : 0.6 vs. 1 : 1 in E. andrewi and 1 : 0.8 in E. spectabilis); and P5 exopod has a comb-like innermost seta, while it is bipinnate seta in E. spectabilis. To prove the Korean species of Eudactylopus to be new, full descriptions of both sexes are given here, and the claim is supported by distinct genetic differences between E. yokjidoensis and E. spectabilis (22.3-22.7%) in the mitochondrial gene cytochrome oxidase subunit I(mtCOI) sequence.

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References

  1. Bodin P, 1997. Catalogue of the new marine harpacticoid copepods (1997 edition). Documents du travail de l'Institut Royal des Sciences Naturelles de Belgique, 8:1-304.
  2. Boxshall GA, Halsey SH, 2004. An introduction to copepod diversity. The Ray Society, London, pp. 1-966.
  3. Brady GS, 1905. On Copepoda and other Crustacea taken off Northumberland and Durham in July, 1904. Transactions of the Natural History Society of Northumberland, Durham, and Newcastle-upon-Tyne, 1:210-223.
  4. Brian A, 1923. Elenco di copepodi marini bentonici provenienti da Rovigno e descrizione di una n. varieta di Parathalestris clausi Norm. Monitore Zoologico Italiano, 34:126-135.
  5. Brian A, 1928. Descrizione di specie nuove o poco conosciute di copepodi bentonici del mare Egeo. Bollettino dei Musei di Zoologia e Anatomia Comparata della Universita di Genova, 7:1-37.
  6. Chang CY, Song SJ, 1995. Marine harpacticoid copepods of genus Eudactylopus (Harpacticoida, Thalestridae) in Korea. Korean Journal of Systematic Zoology, 11:379-388.
  7. Claus C, 1863. Die frei lebenden Copepoden mit besonderer Berucksichtigung der Fauna Deutschlands, der Nordsee und des Mittelmeeres. Wilhelm Engelmann, Leipzig, pp. 1-230.
  8. Costa FO, deWaard JR, Boutillier J, Ratnasingham S, Dooh RT, Hajibabaei M, Hebert PDN, 2007. Biological identifcations through DNA barcodes: the case of the Crustacea. Canadian Journal of Fisheries and Aquatic Sciences, 64:272-295. https://doi.org/10.1139/f07-008
  9. Floyd R, Abebe E, Papert A, Blaxter M, 2002. Molecular barcodes for soil nematode identification. Molecular Ecology, 11:839-850. https://doi.org/10.1046/j.1365-294X.2002.01485.x
  10. Folmer O, Balck M, Hoeh W, Lutz R, Vrijenhoek R, 1994. DNA primers for amplification of mitochondrial cyto- chrome c oxidase subunit I from diverse metazoan inver- tebrates. Molecular Marine Biology and Biotechnology, 3:294-299.
  11. Geddes DC, 1969. Marine biological investigations in the Bahamas. 9. Harpacticoid copepods belonging to the family Thalestridae. Sarsia, 39:1-16. https://doi.org/10.1080/00364827.1969.10411154
  12. Hicks GRF, 1980. Structure of phytal harpacticoid copepod assemblages and the influence of habitat complexity and turbidity. Journal of Experimental Marine Biology and Ecology, 44:157-192. https://doi.org/10.1016/0022-0981(80)90151-3
  13. Hicks GRF, 1988. Systematics of the Donsiellinae Lang (Copepoda, Harpacticoida). Journal of Natural History, 22:639-684. https://doi.org/10.1080/00222938800770441
  14. Holmes JMC, O'Connor JP, 1988. A portable light-trap for collecting marine crustaceans. Journal of the Marine Biological Association of the United Kingdom, 68:235-238. https://doi.org/10.1017/S0025315400052140
  15. Huys R, Boxshall GA, 1991. Copepod evolution. Publication No. 159. The Ray Society, London, pp. 1-468.
  16. Ito T, 1974. Descriptions and records of marine harpacticoid copepods from Hokkaido, V. Journal of the Faculty of Science, Hokkaido University, Series VI, Zoology, 19:546-640.
  17. Karanovic T, Eberhard S, Cooper SJB, Guzik MT, 2015. Morphological and molecular study of the genus Nitokra (Crustacea, Copepoda, Harpacticoida) in a small palaeochannel in Western Australia. Organisms Diversity and Evolution, 15:65-99. https://doi.org/10.1007/s13127-014-0193-3
  18. Karanovic T, Kim K, Lee W, 2014. Morphological and molecular affnities of two East Asian species of Stenhelia (Crustacea, Copepoda, Harpacticoida). Zookeys, 411:105-143. https://doi.org/10.3897/zookeys.411.7346
  19. Lang K, 1936. Copepoda Harpacticoida. Further Results of the Swedish Antarctic Expedition 1901-1903, 3:1-68.
  20. Lang K, 1944. Monographie der Harpacticiden (Vorlaufge Mitteilung). Almqvist and Wiksells Boktryckeri, Uppsala, pp. 1-39.
  21. Lang K, 1965. Copepoda Harpacticoidea from the Californian Pacific coast. Kunglieren Svenska Vetenskapsakademiens Handlingar, 10:1-560.
  22. Lefebure T, Douady CJ, Gouy M, Gibert J, 2006. Relationship between morphological taxonomy and molecular divergence within Crustacea: proposal of a molecular threshold to help species delimitation. Molecular Phylogenetics and Evolution, 40:435-447. https://doi.org/10.1016/j.ympev.2006.03.014
  23. Marcus A, Por F, 1960. Die Copepoden einer Probe aus dem Felsbiotop von Yalt a (Krimhalbinsel). "Grigore Antipa" National Museum of Natural History, 2:145-163.
  24. Monard A, 1928. Les harpacticoides marins de Banyuls. Archives de Zoologie Experimentale et Generale, 67:259-443.
  25. Nicholls AG, 1941. Littoral Copepoda from South Australia. (I) Harpacticoida. Records of the South Australian Museum, 6:381-427.
  26. Nicholls AG, 1942. Marine Copepoda from Western Australia. I. Littoral harpacticoids from Rottnest Island. Journal of the Royal Society of Western Australia, 27:135-141. https://doi.org/10.2988/10-36.1
  27. Noodt W, 1955. Marine Harpacticoiden (Crust. Cop.) aus dem Marmara Meer. Istanbul Universitesi fen Fakultesi Mecmuasi, 20B:49-94.
  28. Scott A, 1909. The Copepoda of the Siboga Expedition. Part I. Free-swimming, littoral and semi-parasitic Copepoda. Siboga Expedition Monographs, 29a:1-323.
  29. Scott T, 1893. Report on Entomostraca from the Gulf of Guinea, collected by John Rattray, B.Sc. Transactions of the Linnean Society of London, 6:1-161. https://doi.org/10.1111/j.1096-3642.1894.tb00660.x
  30. Sewell RBS, 1940. Copepoda Harpacticoida. Scientifc Reports of the John Murray Expedition, 7:117-382.
  31. Tamura K, Stecher G, Peterson D, Filipski A, Kumar S, 2013. MEGA6: molecular evolutionary genetics analysis version 6.0. Molecular Biology and Evolution, 30:2725-2729. https://doi.org/10.1093/molbev/mst197
  32. Vervoort W, 1964. Free-living Copepoda from Ifaluk Atoll in the Caroline Islands with notes on related species. Bulletin of the United States National Museum, 236:1-431. https://doi.org/10.5479/si.03629236.236.1
  33. Walsh PS, Metzger DA, Higuchi R, 1991. Chelex 100 as a medium for simple extraction of DNA for PCR-based typing from forensic material. Biotechniques, 10:506-513.
  34. Wells JBJ, 2007. An annotated checklist and keys to the species of Copepoda harpacticoida (Crustacea). Zootaxa, 1568:1-872.
  35. Wells JBJ, Rao GC, 1987. Littoral Harpacticoida (Crustacea: Copepoda) from Andaman and Nicobar Islands. Memoirs of the Zoological Survey of India, 16:1-385.
  36. Willen E, 2000. Phylogeny of the Thalestridimorpha Lang, 1944 (Crustacea, Copepoda). Cuvillier Verlag, Gottingen, pp. 1-233.
  37. Wilson CB, 1925. New North American parasitic copepods, new hosts, and notes on copepod nomenclature. Proceedings of the United States National Museum, 64:1-22. https://doi.org/10.5479/si.00963801.64-2507.1