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Type: Article
Published: 2021-10-12
Page range: 41-67
Abstract views: 361
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Two new species of Tigriopus Norman, 1869 from Chonburi Province, Thailand (Crustacea: Copepoda: Harpacticidae)

Department of Biology, Ramkhamhaeng University, Bangkok 10240, Thailand.
Department of Biology, Bansomdejchaopraya Rajabhat University, Bangkok 10600, Thailand.
School of Earth and Environmental Sciences & Research Institute of Oceanography, Seoul National University, Seoul 08826, Korea.
School of Earth and Environmental Sciences & Research Institute of Oceanography, Seoul National University, Seoul 08826, Korea.
Harpacticoida identification key morphology Namsai Beach taxonomy Ulva clathrata Wannapa Beach Crustacea

Abstract

Two new species of the family Harpacticidae Dana, 1846, Tigriopus namsaiensis sp. nov. and T. wannapaensis sp. nov. were found in algal washings at Namsai and Wannapa beaches in Chonburi Province, Thailand. There are currently 14 known species in the genus, two of which, T. thailandensis Chullasorn, Ivanenko, Dahms, Kangtia & Yang, 2012 and T. sirindhornae Chullasorn, Dahms & Klangsin, 2013 were also discovered in Thailand. The genus Tigriopus Norman, 1869 has a worldwide distribution with nine species recorded from the Pacific Ocean (seven in the North Pacific and two in the South Pacific), four species from the Atlantic and adjacent seas, two species from the South Indian Ocean, and one species from Antarctica.

                Sexual dimorphism is expressed in the antennule, antenna, P2, P5, P6, and segmentation of the urosome. Tigriopus namsaiensis sp. nov. and T. wannapaensis sp. nov. are closely related to T. thailandensis and T. sirindhornae in sharing the following characters: fewer sensilla on the prosome; antennary exopod with one seta on exp-2; P4 exp-3 with two inner setae; female P5 baseoendopod with five setae; male P2 enp-2 with a seta fused to the segment; and male P5 exopod with five setae.

                Tigriopus namsaiensis sp. nov. closely resembles T. thailandensis, but the new species is characterized by four setae on the maxillulary coxa (three setae in T. thailandensis), the outermost seta on the female P6 is plumose (instead of the middle one), the lateral seta on the apical segment of the antennary exopod is discrete at the base (instead of fused to the segment), and the outermost seta of the male P5 exopod is plumose (instead of spinulose).

                Tigriopus wannapaensis sp. nov. is very closely related to T. sirindhornae, but the new species differs from the latter by the following characteristics: 2-segmented mandibular exopod (3-segmented in T. sirindhornae); five setae on the maxillulary coxa (instead of three); all setae on female P6 are plumose (instead of two plumose and one pinnate); the lateral seta on the apical segment of the antennary exopod is fused to the segment (instead of discrete at the base); and the outermost seta on the male P5 exopod is plumose (instead of spinulose).

                A dichotomous identification key to the 16 valid species of Tigriopus is provided.

 

References

  1. Agardh, C.A. (1811) Dispositio algarum Sueciæ. Litteris Berlingianis, Lundae [Lund], 45 pp.
    Baker, C.F. (1912) Notes on the Crustacea of Laguna beach. Annual report of the Laguna Marine Laboratory, 1, 100–117.
    Boxshall, G.A. & Halsey, S.H. (2004) An Introduction to Copepod Diversity. The Ray Society, London, 966 pp.
    Božić, B. (1960) Le genre Tigriopus Norman (Copépodes Harpacticoïdes) et ses formes européennes; recherches morphologiques et expérimentales. Archives de Zoologie expérimentale et générale, 98, 167–269.
    Bradford, J. (1967) The genus Tigriopus Norman (Copepoda, Harpacticoida) in New Zealand with a description of a new species. Transactions of the Royal Society of New Zealand, Zoology, 10, 51–59.
    Candeias, A. (1959) Contribution to the knowledge of the Harpacticoida (Crustacea, Copepoda) from the littoral of Angola. Publicações culturais da Companhia de Diamantes de Angola, 45, 79–104.
    Carli, A. & Fiori, A. (1977) Morphological analysis of the two Tigriopus species found along the European coasts. Natura, Milan, 68, 101–110.
    Chullasorn, S., Dahms, H.-U. & Klangsin, P. (2013) A new species of Tigriopus (Copepoda: Harpacticoida: Harpacticidae) from Thailand with a key to the species of the genus. Journal of natural History, 47, 427–447. https://doi.org/10.1080/00222933.2012.757660
    Chullasorn, S., Ivanenko, V.N., Dahms, H.-U., Kangtia, P. & Yang, W.X. (2012) A new species of Tigriopus (Copepoda, Harpacticoida, Harpacticidae) from Thailand with the description of naupliar development. Helgoland marine Research, 66, 139–151. https://doi.org/10.1007/s10152-011-0254-3
    Damgaard, R.M. & Davenport, J. (1994) Salinity tolerance, salinity preference and temperature tolerance in the high-shore harpacticoid copepod Tigriopus brevicornis. Marine Biology, 118, 443–449. https://doi.org/10.1007/BF00350301
    Dana, J.D. (1846) Notice of some genera of Cyclopacea. American Journal of Science and Arts, Series 2, 1, 225–230.
    Fischer, S. (1860) Beiträge zur Kenntniss der Entomostraceen. Abhandlungen der mathematisch-physikalischen Classe der königlich bayerischen Akademie der Wissenschaften, 8 (3), 645–680, pls. XX–XXII.
    Huys, R. & Boxshall, G.A. (1991) Copepod Evolution. The Ray Society, London, 468 pp.
    Huys, R., Gee, J.M., Moore, C.G. & Hamond, R. (1996) Marine and Brackish Water Harpacticoid Copepods. Part 1. In: Barnes, R.S.K. & Crothers, J.H. (Eds.), Synopses of the British Fauna, New Series, 51, pp. i–viii + 1–352. [Field Studies Council, Shrewsbury]
    Itô, T. (1970) The biology of a harpacticoid copepod, Tigriopus japonicus Mori. Journal of the Faculty of Sciences, Hokkaido University, Series VI, Zoology, 17, 474–500.
    Itô, T. (1977) New species of marine harpacticoid copepods of the genera Harpacticella and Tigriopus from the Bonin Islands, with reference to the morphology of copepodid stages. Journal of the Faculty of Sciences, Hokkaido University, Series VI, Zoology, 21, 61–91.
    Itô, T. (1988) Taxonomy within the genus Tigriopus (Copepoda: Harpacticoida) from Japan, with reference to the relationship between Tigriopus japonicus and T. californicus. Annual Report of the Seto marine biological Laboratory, 2, 28–35.
    Ki, J.-S., Lee, K.-W., Park, H.G., Chullasorn, S., Dahms, H.-U. & Lee, J.-S. (2009) Phylogeography of the copepod Tigriopus japonicus along the Northwest Pacific rim. Journal of Plankton Research, 31, 209–221. https://doi.org/10.1093/plankt/fbn100
    Kim, I.-C., Kim, Y.J., Song, S.J., Lee, J.-S. & Lee, W. (2003) The intertidal harpacticoid copepod Tigriopus japonicus (Crustacea: Copepoda) β-actin gene: cloning, sequence and intraspecies variation. DNA Sequence, 14, 279–284. https://doi.org/10.1080/1085566031000141135
    Lang, K. (1933) Zwei neue Brackwasserharpacticiden von den Macquarie-Inseln. Kungliga fysiografiska Sällskapets Lund Förhandlingar, 3 (1), 1–14.
    Mori, T. (1938) Tigriopus japonicus, a new species of neritic Copepoda. Zoological Magazine, Tokyo, 50, 294–295, pl. 9.
    Müller, O.F. (1776) Zoologiæ Danicæ Prodromus, seu Animalium Daniæ et Norvegiæ indigenarum characteres, nomina, et synonyma imprimis popularium. Typis Hallageriis, Havniæ, xxxii + 282 pp. https://doi.org/10.5962/bhl.title.13268
    Norman, A.M. (1869) Shetland final dredging report.—Part II. On the Crustacea, Tunicata, Polyzoa, Echinodermata, Actinozoa, Hydrozoa, and Porifera. Report of the British Association for the Advancement of Science, 38, 247–336.
    Park, E.O., Lee, S., Cho, M., Yoon, S.H., Lee, Y. & Lee, W. (2014) A new species of the genus Tigriopus (Copepoda: Haepacticoida: Harpacticidae) from Antarctica. Proceedings of the biological Society of Washington, 127, 138–154. https://doi.org/10.2988/0006-324X-127.1.138
    Raisuddin, S., Kwok, K.W., Leung, K.M., Schlenk, D. & Lee, J.S. (2007) The copepod Tigriopus: A promising marine model organism for exotoxicology and environmental genomics. Aquatic Toxicology, 83, 161–173. https://doi.org/10.1016/j.aquatox.2007.04.005
    Sars, G.O. (1903) Copepoda Harpacticoida. Parts I & II, Misophriidæ, Longipediidæ, Cerviniidæ, Ectinosomidæ (part). An account of the Crustacea of Norway, with short Descriptions and Figures of all the Species, 5, 1–28, pls. I–XVI.
    Soyer, J., Thiriot-Quievreux, C. & Colomines J.-C. (1987) Description de deux espèces jumelles du groupe Tigriopus angulatus (Copepoda, Harpacticoida) dans les archipels Crozet et Kerguelen (Terres Australes et Antarctiques Françaises). Zoological Scripta, 16, 143–154. https://doi.org/10.1111/j.1463-6409.1987.tb00061.x
    Wells, J.B.J. (2007) An annotated checklist and keys to the species of Copepoda Harpacticoida (Crustacea). Zootaxa, 1568 (1), 1–872. https://doi.org/10.11646/zootaxa.1568.1.1