Abstract
Monstrilloid copepods of the genus Monstrillopsis Sars, 1921 are recorded from Korea, as well as from the northwestern Pacific, for the first time. Specimens were obtained using a light trap set overnight at piers or seawalls in small harbors. Males of two new species were found and are described herein with remarks on their affinities and detailed drawings and SEM photographs of their morphological features. Monstrillopsis longilobata sp. nov. is allied to M. chathamensis Suárez-Morales & Morales-Ramírez, 2009 and M. sarsi Isaac, 1974 in having the character combination of a long, claw-like apical spinous process on the male antennule and elongate genital lappets. It differs from them in having conspicuous transverse striations on the dorsal surface of the cephalothorax and extremely long male genital lappets, which extend far beyond the anterior margins of the caudal rami. Monstrillopsis coreensis sp. nov. also has a claw-like apical spinous process of the male antennule and conspicuous transverse striations on the dorsal surface of the cephalothorax, but it differs from M. longilobata in having a much longer and stronger apical spine of the antennule and a relatively shorter and undulating genital apparatus.
References
Boxshall, G.A. & Halsey, S.H. (2004) An Introduction to Copepod Diversity. The Ray Society, London, xv + 966 pp.
Chang, C.Y. (2012) First record of monstrilloid copepods in Korea: Description of a new species of the genus Cymbasoma (Monstrilloida, Monstrillidae). Animal Systematics, Evolution and Diversity, 28, 126–132.
http://dx.doi.org/10.5635/ased.2012.28.2.126
Chang, C.Y. (2014) Two new records of monstrilloid copepods (Crustacea) from Korea. Animal Systematics, Evolution and Diversity, 30, 206–214.
http://dx.doi.org/10.5635/ased.2014.30.3.206
Dana, J.D. (1849) Conspectus Crustaceorum quæ in orbis terrarum circumnavigatione, Carolo Wilkes e classe Reipublicæ Fœderatæ duce, lexit et descripsit Jacobus D. Dana. Pars II. Proceedings of the American Academy of Arts and Sciences, 2, 9–61. [also published as a pamphlet (printing date 1847/1849): Conspectus Crustaceorum quæ in orbis terrarum circumnavigatione, Carolo Wilkes e classe Reipublicæ Fœderatæ duce, lexit et descripsit Jacobus D. Dana. Ex Academiæ Artium Scientiarumque Americanæ nuntiis. Typis Metcalf et Soc. Univ. Typograph, Cantabrigiæ, pagination various]
http://dx.doi.org/10.2307/20021076
Davis, C.C. (1949) A preliminary revision of the Monstrilloida, with descriptions of two new species. Transactions of the American microscopical Society, 68, 245–255.
http://dx.doi.org/10.2307/3223221
Dolgopol’skaya, M.A. (1948) K faune Monstrillidae Chernogo morya. (Monstrillidae from the Black Sea). Trudy Zoologicheskogo Instituta, Akademii Nauk SSSR, 7 (3), 177–183. [in Russian]
Giesbrecht, W. (1891) Elenco dei Copepodi pelagici raccolti dal Tenente di vascello Gaetano Chierchia durante il viaggio della R. Corvetta “Vettor Pisani” negli anni 1882–1885 e dal Tenente di vascello Francesco Orsini nel Mar Rosso, nel 1884. Atti della Accademia nazionale dei Lincei. Rendiconti. Classe di Scienze fisiche, matematiche e natural, Series 4, 7 (Sem. 1), 474–481.
Grygier, M.J. & Ohtsuka, S. (1995) SEM observation of the nauplius of Monstrilla hamatapex, new species, from Japan and an example of upgraded descriptive standards for monstrilloid copepods. Journal of crustacean Biology, 15, 703–719.
http://dx.doi.org/10.2307/1548820
Huys, R. & Boxshall, G.A. (1991) Copepod Evolution. The Ray Society, London, 468 pp.
Huys, R., Llewellyn-Hughes, J., Conroy-Dalton, S., Olson, P.D., Spinks, J.N. & Johnston, D.A. (2007) Extraordinary host switching in siphonostomatoid copepods and the demise of the Monstrilloida: Integrating molecular data, ontogeny and antennulary morphology. Molecular Phylogenetics and Evolution, 43, 368–378.
http://dx.doi.org/10.1016/j.ympev.2007.02.004
Isaac, M.J. (1974) Copepoda Monstrilloida from south-west Britain including six new species. Journal of the marine biological Association of the United Kingdom, 54, 127–140.
http://dx.doi.org/10.1017/S0025315400022116
Razouls, C., Bovée, F. de, Kouwenberg, J. & Desreumaux, N. (2005–2014) Monstrillidae Dana, 1849: Diversity and Geographic Distribution of Marine Planktonic Copepods. Available from: http://copepodes.obs-banyuls.fr/en/fichefamlist.php?fam=35#g151 (accessed 4 June 2014)
Sars, G.O. (1921) Copepoda Monstrilloida and Notodelphyoida. Parts I & II. Thaumatopsyllidae, Monstrillidae, Notodelphyidae (part). An Account of the Crustacea of Norway, with short Descriptions and Figures of all the Species, 8, 1–32, plates I–XVI.
Scott, T. (1904) Notes on some rare and interesting marine Crustacea. Reports of the Fishery Board for Scotland, Edinburgh, 22 (3), 242–261.
http://dx.doi.org/10.5962/bhl.title.53621
Shirayama, Y., Kaku, T. & Higgins, R.P. (1993) Double-sided microscopic observation of meiofauna using an HS-slide. Benthos Research, 44, 41–44.
Suárez-Morales, E. (2011) Diversity of the Monstrilloida (Crustacea: Copepoda). PLoS ONE, 6 (8), e22915.
http://dx.doi.org/10.1371/journal.pone.0022915
Suárez-Morales, E., Bello-Smith, A. & Palma, S. (2006) A revision of the genus Monstrillopsis Sars (Crustacea: Copepoda: Monstrilloida) with description of a new species from Chile. Zoologischer Anzeiger, 245, 95–107.
http://dx.doi.org/10.1016/j.jcz.2006.05.002
Suárez-Morales, E., Carrillo, A. & Morales-Ramírez, A. (2013) Report on some monstrilloids (Crustacea: Copepoda) from a reef area off the Caribbean coast of Costa Rica, Central America with description of two new species. Journal of natural History, 47, 619–638.
http://dx.doi.org/10.1080/00222933.2012.742933
Suárez-Morales, E. & Dias, C. (2001) Taxonomic report of some monstrilloids (Copepoda: Monstrilloida) from Brazil with description of four new species. Bulletin de l’Institut royal des Sciences naturelles de Belgique, Biologie, 71, 65–81.
Suárez-Morales, E. & Ivanenko, V.N. (2004) Two new species of Monstrillopsis Sars (Copepoda: Monstrilloida) from the White Sea and Norway, with comments on M. dubia Scott. Arctic, 57, 37–46.
http://dx.doi.org/10.14430/arctic481
Suárez-Morales, E. & McKinnon, A.D. (2014) The Australian Monstrilloida (Crustacea: Copepoda) I. Monstrillopsis Sars, Maemonstrilla Grygier & Ohtsuka, and Australomonstrillopsis gen. nov. Zootaxa, 3779 (3), 301–340.
http://dx.doi.org/10.11646/zootaxa.3779.3.1
Suárez-Morales, E. & Morales-Ramírez, A. (2009) New species of Monstrilloida (Crustacea: Copepoda) from the Eastern Tropical Pacific. Journal of natural History, 43, 1257–1271.
http://dx.doi.org/10.1080/00222930902894419
Walter, T.C. & Boxshall, G.A. (2014) Monstrillidae Dana, 1849. In: Walter, T.C. & Boxshall, G.A. (Eds.), World of Copepods Database. Accessed through World Register of Marine Species. Available from: http://www.marinespecies.org/aphia.php?p=taxdetails&id=119777 (accessed 10 May 2014)