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Description of a New Species of Elaphognathia (Isopoda: Gnatheidae) from Japan Based on Morphological and Molecular Traits

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Abstract Elaphognathia cornigera is a sponge-dwelling species of isopod that occurs in the intertidal zone in the main island of Japan. Currently, another population of Elaphognathia has been found from Okinawa-jima Island (classified as Elaphognathia sp.). Although it is quite similar in morphology to E. cornigera, the habitat and seasonal traits are quite different between Okinawa-jima Is. and Izu Peninsula. In this paper, we examined Elaphognathia sp. and E. cornigera from several sampling sites using morphological analysis and ribosomal DNA ITS2 sequences. Morphological analysis revealed adult males of Elaphognathia sp. were distinguished from E. cornigera by the number of pylopod seta: E. nunomurai, 5.5 ± 1.1 (Haneji, N  =  18) and 4.1 ± 1.4 (Odo, N  =  18); E. cornigera, 11.6 ± 2.0 (Amakusa, N  =  18) and 13.7 ± 1.4 (Miura, N  =  18). Elaphognathia sp. were also distinguished from E. cornigera by means of rDNA ITS2 sequences, with differences between the E. cornigera group and Elaphognathia sp. being 5.3 and 5.9%, whereas the sequence differences between E. cornigera from Miura, Shimoda, and Amakusa were relatively low (0.5-1.4%). Thus, we describe a new species, Elaphognathia nunomurai.

Affiliations: 1: (YO, correspondence,; MH, Graduate School of Engineering and Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan; 2: (KT, Global Oceanographic Data Center (GODAC), Toyohara, Nago, Okinawa 905-2172, Japan; 3: (EH, Faculty of Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan


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1. Alvarez B. , Krishnan M. , Gibb K. 2007 "Analysis of intragenomic variation of the rDNA internal transcribed spacers (ITS) in Halichondrida(Porifera: Demospongiae)." Journal of the Marine Biological Association of the United Kingdom Vol 87 1599 1605
2. Castresana J. 2000 "Selection of conserved blocks from multiple alignments for their use in phylogenetic analysis." Molecular Biology and Evolution Vol 17 540 552
3. Chan T. Y. , Ho K. C. , Li C. P. , Chu K. H. 2009 "Origin and diversification of the clawed lobster genus Metanephrops(Crustacea: Decapoda: Nephropidae)." Molecular Phylogenetics and Evolution Vol 50 411 422
4. Cohen B. F. , Poore G. C. B. 1994 "Phylogeny and biogeography of the Gnathiidae (Crustacea: Isopoda) with descriptions of new genera and species, most from south-eastern Australia." Memoirs of Museum Victoria Vol 54 271 397
5. Conole J. C. , Chilton N. B. , Järvis T. , Gasser R. B. 1999 "Intraspecific and interspecific variation in the second internal transcribed spacer (ITS-2) sequence for Metastrongylus(Nematoda: Metastrongyloidea) detected by high resolution PCR-RFLP." International Journal of Parasitology Vol 29 1935 1940
6. Dover G. A. 1986 "Molecular drive in multigene families: how biological novelties arise, spread and are assimilated." Trends in Genetics Vol 2 159 165
7. Edgar R. C. 2004 "MUSCLE: multiple sequence alignment with high accuracy and high throughput." Nucleic Acids Resarch Vol 32 1792 97
8. Fisher B. L. , Smith M. A. 2008 "A revision of Malagasy species of Anochetus mayrand Odontomachus latreille(Hymenoptera: Formicidae)." Public Library of Science Oneline Vol 3 e1787
9. Folmer O. , Black M. , Hoeh W. , Lutz R. , Vrijenhoek R. 1994 "DNA primers for amplification of mitochondrial cytochrome c oxidase subunit I from diverse metazoan invertebrates." Molecular Marine Biological Biotechnology Vol 3 294 299
10. Grutter A. S. , Morgan J. A. T. , Adlard R. D. 2000 "Characterising parasite gnathiid isopod species and matching life stages with ribosomal DNA ITS2 sequences." Marine Biology Vol 136 201 205
11. Hadfield K. A. , Smit N. J. 2008 "Description of a new gnathiid, Afrignathia multicaveagen. et sp. n. (Crustacea: Isopoda: Gnathiidae), from South Africa." African Zoology Vol 43 81 89[81:DOANGA]2.0.CO;2
12. Harris D. J. , Crandall K. A. 2000 "Intragenomic variation within ITS1 and ITS2 of freshwater crayfishes (Decapoda: Cambaridae): implications for phylogenetic and microsatellite studies." Molecular Biology and Evolution Vol 17 284 291
13. Hirose M. , Yokobori S. , Hirose E. 2009 "Potential speciation of morphotypes in the photosymbiotic ascidian Didemnum mollein the Ryukyu Archipelago, Japan." Coral Reefs Vol 28 119 126
14. Jobb G. 2008 TREEFINDER version of January 2008. Munich, Germany. Available from:
15. Keller I. , Chintauan-Marquier I. C. , Veltsos P. , Nichols R. A. 2006 "Ribosomal DNA in the grasshopper Podisma pedestris: escape from concerted evolution." Genetics Vol 174 863 874
16. Kensley B. , Schotte M. , Poore G. C. B. 2009 "Gnathiid isopods (Crustacea: Isopoda Gnathiidae), mostly new, from the Indian Ocean." Proceedings of the Biological Society of Washington Vol 122 32 51
17. Leo N. P. , Barker S. C. 2002 "Intragenomic variation of ITS2 rDNA in the louse of humans, Pediculus humanus: ITS2 is not a suitable marker for population studies in this species." Insect Molecular Biology Vol 11 651 657
18. Li C. , Wilkerson R. C. 2007 "Intragenomic rDNA ITS2 variation in the Neotropical Anopheles (Nyssorhynchus) albitarsis complex (Diptera: Culicidae)." Journal of Heredity Vol 98 51 59
19. Márquez L. M. , Miller D. J. , MacKenzie J. B. , van Oppen M. J. H. 2003 "Pseudogenes contribute to the extreme diversity of nuclear ribosomal DNA in the hard coral Acropora." Molecular Biology and Evolution Vol 20 1077 1086
20. Monod T. 1926 "Les Gnathiidae." Mémories de la Société des Sciences Naturelles du Maroc Vol 13 1 668
21. Mouchet S. 1928 "Note sur le cycle évolutif des Gnathiidae." Billetin de la Société Zoologique de France Vol 53 392 400
22. Nagel L. , Montgomerie R. , Lougheed S. C. 2008 "Evolutionary divergence in common marine ectoparasites Gnathiaspp. (Isopoda: Gnathiidae) on the Great Barrier Reef: phylogeography, morphology, and behaviour." Biological Journal of the Linnean Society Vol 94 569 587
23. Nunomura N. 1988 "A new species of Gnathia(Crustacea, Isopoda) from the Sea off Ibaragi, central Japan." Bulletin of the Toyama Science Museum Vol 12 27 28
24. Nunomura N. 1992 "Marine Isopoda from Amakusa, Kyushu (II)." Publications from the Amakusa Marine Biological Laboratory, Kyushu University Vol 11 59 71
25. Nunomura N. 2006 "Marine isopod crustaceans in the Sagami Sea, Central Japan." Memoirs of the National Science Museum Vol 41 7 42
26. Osborn K. J. 2009 "Relationships within the Munnospidae (Crustacea, Isopoda, Asellota) based on three genes." Zoologica Scripta Vol 38 617 635
27. Ota Y. , Hirose E. 2009 "Description of Gnathia maculosaand a new record of Gnathia trimaculata(Crustacea, Isopoda, Gnathiidae), ectoparasites of elasmobranchs from Okinawan coastal waters." Zootaxa Vol 2114 50 60
28. Ota Y. , Tanaka K. , Hirose E. 2008 "Seasonal fluctuations of the sponge-dwelling gnathiid isopod Elaphognathiaaff. cornigera." Crustacean Research Vol 37 14 25
29. Posada D. , Crandall K. A. 1998 "Modeltest: testing the model of DNA substitution." Bioinformatics Vol 14 817 818
30. Ratnasingham S. , Hebert P. D. 2007 "BOLD: The Barcode of Life Data System (" Molecular Ecology Notes Vol 7 355 364
31. Reed K. M. , Hackett J. D. , Phillips R. B. 2000 "Comparative analysis of intra-individual and inter-species DNA sequence variation in salmonid ribosomal DNA cistrons." Gene Vol 249 115 125
32. Ronquist F. , Huelsenbeck J. P. 2003 "Bayesian phylogenetic inference under mixed models." Bioinformatics (Oxf) Vol 19 1572 1574
33. Sambrook J. , Fritsch E. F. , Maniatis T. 1989 Molecular cloning: a laboratory manual Cold Spring Harbor Laboratory New York
34. Shimomura M. , Tanaka K. 2008 "A new species of ThaumastognathiaMonod, 1926 from Japan (Isopoda, Gnathiidae)." Crustaceana Vol 81 1091 1097
35. Smit N. J. , Davies A. J. 2004 "The curious life-style of the parasitic stages of gnathiid isopods." Advances in Parasitology Vol 58 289 391
36. Stoll C. 1962 "Cycle évolutif de Paragnathia formica(Hesse) (Isopoda: Gnathiidae)." Cahiers de Biologie Marine Vol 3 401 416
37. Swofford D. 2003 PAUP* 4.0b7a, Phylogenetic analysis using parsimony (*and other methods) Sinauer Associates Sunderland
38. Sword G. A. , Senior L. B. , Gaskin J. F. , Joern A. 2007 "Double trouble for grasshopper molecular systematics: intra-individual heterogeneity of both mitochondrial 12S-valine-16S and nuclear internal transcribed spacer ribosomal DNA sequences in Hesperotettix viridis(Orthoptera: Acrididae)." Systematic Entomology Vol 32 420 428
39. Tanaka K. 2003 "Population dynamics of the sponge-dwelling gnathiid isopod Elaphognathia cornigera." Journal of the Marine Biological Association of the United Kingdom Vol 83 95 102
40. Tanaka K. 2007 "Life history of gnathiid isopods–current knowledge and future directions." Plankton & Benthos Research Vol 2 1 11
41. Tanaka K. , Aoki M. 1998 "Crustacean infauna of the demosponge Halichondria okadai(Kadota) with reference to the life cycle of Gnathiasp. (Isopoda: Gnathiidea)," pp. 259 267 In Watanabe Y. , Futami N. (eds.) “Sponge Science: multidisciplinary perspectives” Springer-Verlag Tokyo
42. Tanaka K. , Aoki M. 1999 "Spatial distribution patterns of the sponge-dwelling gnathiid isopod Elaphognathia cornigera(Nunomura) on an intertidal rocky shore of the Izu Peninsula, southern Japan." Crustacean Research Vol 28 160 167
43. Tanaka K. , Aoki M. 2000 "Seasonal traits of reproduction in a gnathiid isopod Elaphognathia cornigera(Nunomura, 1992)." Zoological Science Vol 17 467 475
44. Tanaka K. , Nishi E. 2008 "Habitat use by the gnathiid isopod Elaphognathia discolorliving in terebellid polychaete tubes." Journal of the Marine Biological Association of the United Kingdom Vol 88 57 63
45. Thornhill D. J. , LaJeunesse T. C. , Santos S. R. 2007 "Measuring rDNA diversity in eukaryotic microbial systems: how intragenomic variation, pseudogenes, and PCR artifacts confound biodiversity estimates." Molecular Ecology Vol 16 5326 5340
46. Wörheide G. , Nichols S. A. , Goldberg J. 2004 "Intragenomic variation of the rDNA internal transcribed spacers in sponges (Phylum Porifera): implications for phylogenetic studies." Molecular Phylogenetics and Evolution Vol 33 816 830

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