Abstract
Monstrilloid copepods collected during the past two decades from zooplankton surveys in reef and coastal areas of Australia were analyzed. A first contribution included the taxonomic analysis of three genera of the Monstrilloida, Monstrillopsis Sars, 1921, Maemonstrilla Grygier & Ohtsuka, 2008, and the newly described Australomonstrillopsis Suárez-Morales & McKinnon, 2014. In this document a taxonomic analysis of the species belonging to the genus Cymbasoma Thompson, 1888 is provided. A total of 28 species were found, most of them being undescribed. Seventeen species were described based on females only and eight on male specimens while three species were described from both sexes. Males of Australian species of Cymbasoma are distinguished by details of the genital complex, body size and proportions, ornamentation and processes of the cephalic region, number of caudal setae, and the characteristic structure or ornamentation of the genital lappets. Two main groups of males were distinguished on the basis of the number of caudal setae (3 or 4). As for the females, 20 of the 25 new species of Cymbasoma have fifth legs with an unarmed inner lobe and three setae on the outer lobe; one of these species (C. jinigudira sp. nov.) belongs to the C. longispinosum species-group (sensu Üstün et al. 2014). Another group, consisting of five species, has only two setae on the outer (exopodal) lobe. There were no Australian species of Cymbasoma with a single lobe. A species group, named after C. agoense, is proposed to include species sharing a globose body and a female fifth leg with a large endopodal lobe and an outer (exopodal) lobe with two setae. The females of the new species of Cymbasoma from Australia can be distinguished from their known congeners by unique combinations of characters including the type of body ornamentation, body size and shape, antennule armature and proportions, the presence of distinctive features of the legs 1–4, the presence/absence of processes on the genital compound somite, and the presence/absence of a constriction of the anal somite. We report the occurrence of two previously described species, C. agoense Sekiguchi, 1982 from Japan and C. bali Desai & Krishnaswamy, 1962 from India in Australian waters. Considering the addition of the 25 new species here described, the number of nominal species of the genus is now 66. A key to the Australian species of Cymbasoma (males and females) and a map showing their occurrence in Australia are also provided.
References
Bourne, G.C. (1890) Notes on the genus Monstrilla, Dana. Quarterly Journal of Microscopical Science, 30, 565–578.
Boxshall, G.A. & Halsey, S.H. (2004) An Introduction to Copepod Diversity. The Ray Society, London, 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
Claus, C. (1863) Die frei lebenden Copepoden mit besonderer Berücksichtigung der Fauna Deutschlands, der Nordsee, und des Mittelmeeres. Verlag von Wilhelm Engelmann, Leipzig, 230 pp.
Dakin, W.J. & Colefax, A.N. (1940) The plankton of the Australian coastal waters off New South Wales., Part 1. University of Sydney, Department of Zoology Monographs, 1, 1–215.
Dana, J.D. (1849) Conspectus Crustaceorum quae in Orbis Terrarum circumnavigatione, Carolo Wilkes e Classe Reipublicae Faederatae Duce, lexit et descripsit Jacobus D. Dana. Pars II. Proceedings of the American Academy of Arts and Sciences, 2, 9–61.
Davis, C.C. (1947) Two monstrilloids from Biscayne Bay, Florida. Transactions of the American Microscopical Society, 66, 390–395.
http://dx.doi.org /10.2307/3223116
Davis, C.C. (1949) A preliminary revision of the Monstrilloida with description of two new species. Transactions of the American Microscopical Society, 68, 245–255.
http://dx.doi.org /10.2307/3223221
Desai, H.V. & Krishnaswamy, S. (1962) Cymbasoma bali, a new species of monstrilloid copepod from the Bombay plankton. Proceedings of the Indian Academy of Sciences, 55B, 163–166.
Giesbrecht, W. (1893) Systematik und Faunistik der pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. Fauna und Flora des Golfes Neapel, Monographie 19, 1–831.
Grygier, M.J. (1994) Nomenclature, redescription and new record of Cymbasoma morii Sekiguchi, 1982 (Monstrilloida). Hydrobiologia, 292/293, 23–29.
http://dx.doi.org /10.1007/BF00229919
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 /10.1163/193724095X00118
Grygier, M.J. & Ohtsuka, S. (2008) A new genus of monstrilloid copepods (Crustacea) with anteriorly pointing ovigerous spines and related adaptations for subthoracic brooding. Zoological Journal of the Linnean Society, 152, 459–506.
http://dx.doi.org /10.1111/j.1096-3642.2007.00381.x
Gurney, R. (1927) VII. Report on the Crustacea: Copepoda and Cladocera of the plankton. Transactions of the Zoological Society of London, 22 (2), 139–171.
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.
Isaac, M.J. (1975) Copepoda, Suborder: Monstrilloida. Fiches d’Identification du Zooplancton, 144/145, 1–10.
Khan, M.A. (1976) Cymbasoma williamsoni sp. nov., (Copepoda-Monstrilloida-Monstrillidae) from Manora Channel (northern Arabian Sea). Journal of Science, University of Karachi, 4 (1–2), 47–51.
Kimmerer, W.J. & McKinnon, A.D. (1985) A comparative study of the zooplankton of two adjacent embayments, Port Phillip and Westernport Bays, Australia. Estuarine, coastal & Shelf Science, 21, 145–159.
http://dx.doi.org /10.1016/0272-7714(85)90094-0
Kimmerer, W.J., McKinnon, A.D., Atkinson, M.J. & Kessell, J.A. (1985) Spatial distributions of plankton in Shark Bay, Western Australia. Australian Journal of Marine and Freshwater Research, 36, 421–432.
http://dx.doi.org /10.1071/MF9850421
Leite, N.R., Pereira, L.C.C., Abrunhosa, F., Pires, M.A.B. & Costa, R.M.D. (2010) Occurrence of Cymbasoma longispinosum Bourne, 1890 (Copepoda: Monstrilloida) in the Curuçá River estuary (Amazon Littoral). Annals of the Brazilian Academy of Sciences, 82, 577–583.
http://dx.doi.org /10.1590/S0001-37652010000300005
Mageed, A.A. (2010) Cymbasoma janetae n. sp., a new monstrilloid (Copepoda, Monstrilloida) from the Gulf of Aqaba (Red Sea, Egypt). Crustaceana, 83, 513–523.
http://dx.doi.org /10.1163/156854008X390245
Martin Thompson, P.K. & Easterson, D.C.V. (1983) Two rare monstrilloid copepods from the coastal waters of Bombay. Journal of the Marine Biological Association of India, 20, 176–180.
Nicholls, A.G. (1944) Littoral Copepoda from South Australia. II. Calanoida, Cyclopoida, Notodelphyoida, Monstrilloida and Caligoida. Records of the South Australian Museum, 8, 1–62.
Razouls, C. (1996) Diversité et répartition géographique chez les copépodes pélagiques. 2. Platycopioida, Misophrioida, Mormonilloida, Cyclopoida, Poecilostomatoida, Siphonostomatoida, Harpacticoida, Monstrilloida. Annales de l’ Institut océanographique, Nouvelle Série, 72, 1–149.
Razouls, C., de Bovée, F., Kouwenberg, J. & Desreumaux, N. (2005-2015) Diversity and geographic distribution of marine planktonic copepods. Available from: http://copepodes.obs-banyuls.fr/en (accessed 4 June 2015)
Sale, P.F., McWilliams, P.S. & Anderson, D.T. (1976) Composition of the near-reef zooplankton at Heron Reef, Great Barrier Reef. Marine Biology, 34, 59–66.
http://dx.doi.org /10.1007/BF00390788
Sars, G.O. (1901) Copepoda Calanoida. An account of the Crustacea of Norway with short descriptions and figures of all the species, 4,1–28+ plates I-XVI.
Sars, G.O. (1921) Copepoda Monstrilloida and Notodelphyoida. An account of the Crustacea of Norway with short descriptions and figures of all the species, 8, 1–91 + plates I–XXXVII.
Scott, A. (1909) The Copepoda of the Siboga Expedition. Part I. Free-swimming, littoral and semi-parasitic Copepoda. Siboga Expeditie, 29a, 1–32.
Scott, T. (1904) Notes on some rare and interesting marine Crustacea. Twenty-second Annual Report of the Fishery Board for Scotland, Being for the Year 1903. Part III. Scientific Investigations, 1904, 242–260, pls. XIII–XV.
Sekiguchi, H. (1982) Monstrilloid copepods from Ago Bay, central Japan. Proceedings of the Japanese Society of Systematic Zoology, 22, 24–34.
Sewell, R.B.S. (1949) The littoral and semi-parasitic Cyclopoida, the Monstrilloida and Notodelphyoida. The John Murray Expedition 1933–34 Scientific Reports, 9, 17–199.
Suárez-Morales, E. (1994) Thaumaleus quintanarooensis, a new monstrilloid copepod from the Mexican coasts of the Caribbean Sea. Bulletin of Marine Science, 54, 381–384.
Suárez-Morales, E. (1996) A new species of Cymbasoma (Copepoda: Monstrilloida) from the Sulu Sea, Philippines. Beaufortia, 46 (6), 97–104.
Suárez-Morales, E. (1999) Redescription of the male of Cymbasoma tumorifrons (Isaac, 1975) from the Mediterranean Sea (Copepoda: Monstrilloida). Arthropoda Selecta, 8, 67–71.
Suárez-Morales, E. (2000a) The male of Cymbasoma quintanarooense (Suárez-Morales) (Copepoda, Monstrilloida) from the Caribbean with an identification key for the known males of Cymbasoma. Sarsia, 85, 203–210.
http://dx.doi.org /10.1080/00364827.2000.10414573
Suárez-Morales, E. (2000b) Redescription of two species of Cymbasoma from southwest Britain and from Indonesia (Copepoda: Monstrilloida) with notes on taxonomy. Beaufortia/ Bulletin of the Zoological Museum, 50, 139–149.
Suárez-Morales, E. (2001a) An aggregation of monstrilloid copepods in a western Caribbean reef area: ecological and conceptual implications. Crustaceana, 74, 689–696.
http://dx.doi.org /10.1163/156854001750377966
Suárez-Morales, E. (2001b) Redescription and first record of Cymbasoma boxshalli and Monstrilla inserta (Copepoda: Monstrilloida) from Curaçao, eastern Caribbean Sea. Cahiers de Biologie Marine, 42, 243–254.
Suárez-Morales, E. (2001c) Redescription of two Cymbasoma (Copepoda: Monstrilloida) collected during the Siboga Expedition (1899-1900). Bulletin de l’Institut Royal des Sciences Naturelles de Belgique, Biologie, 71, 53–64.
Suárez-Morales, E. (2002) A new species of Cymbasoma (Copepoda: Monstrilloida) from the Mediterranean Sea with remarks on the female of C. tumorifrons (Isaac). Mitteilungen aus dem Museum für Naturkunde in Berlin. Zoologische Reihe, 78, 87–96.
Suárez-Morales, E. (2006) Validation and redescription of Cymbasoma germanicum (Timm) (Crustacea: Copepoda: Monstrilloida) from Helgoland with comments on C. rigidum Thompson. Helgoland Marine Research, 60, 171–179.
http://dx.doi.org /10.1007/s10152-005-0018-z
Suárez-Morales, E. (2007) Historical record and supplementary description of Cymbasoma bullatum (A. Scott) (Copepoda: Monstrilloida) from the “Albatross” cruise in the Philippines. Zootaxa, 1662, 25–33.
Suárez-Morales, E. (2010) On the taxonomic status of Monstrilla leucopis Sars (Crustacea: Copepoda: Monstrilloida) from Norway, with comments on the male of M. longiremis Giesbrecht. Zootaxa, 2510, 55–67.
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. (2015) Orden Monstrilloida. Revista IDE@, SEA 96 (31-05-2015), 1–12.
Suárez-Morales, E. & Álvarez-Silva, C. (2001) Cymbasoma tumorifrons (Isaac) (Copepoda: Monstrilloida) an expanded description based on a new collection from the Eastern Tropical Pacific. Pacific Science, 55, 183–189.
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. & Escamilla, J.B. (1997) An undescribed monstrilloid copepod (Copepoda: Monstrilloida) from the northern Yucatan Peninsula, Mexico. Bulletin of Marine Science, 61, 539–548.
Suárez-Morales, E. & Gasca, R. (1998) Cymbasoma bowmani n. sp., a new monstrilloid (Copepoda: Monstrilloida) from a Caribbean reef, with notes on species variation. Journal of Marine Systems, 15, 433–439.
Suárez-Morales, E. & Ivanenko, V.N. (2004) Two new species of Monstrillopsis Sars (Crustacea: 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 (1), 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
Suárez-Morales, E. & Palomares-García, R. (1999) Cymbasoma californiense, a new monstrilloid (Crustacea: Copepoda: Monstrilloida) from Baja California, Mexico. Proceedings of the Biological Society of Washington, 112, 189–198.
Suárez-Morales, E. & Pilz, D. (2008) A new species of Cymbasoma (Copepoda: Monstrilloida) from Florida with a redescription of C. quadridens. Journal of the Marine Biological Association of the United Kingdom, 88, 527–533.
http://dx.doi.org/10.1017/S0025315408000623
Suárez-Morales, E. & Riccardi, N. (1997) Redescription and first record of Cymbasoma tenue (Isaac, 1975) (Copepoda: Monstrilloida) in the Mediterranean Sea. Proceedings of the Biological Society of Washington, 110, 99–106.
Suárez-Morales, E., Carrillo, A. & Morales-Ramírez, A. (2013a) 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 (5–12), 619– 638.
http://dx.doi.org/10.1080/00222933.2012.742933
Suárez-Morales, E., Paiva Scardua, M. & Da Silva, P.M. (2010) Occurrence and histo-pathological effects of Monstrilla sp. (Copepoda: Monstrilloida) and other parasites in the brown mussel Perna perna from Brazil. Journal of the Marine Biological Association of the United Kingdom, 90, 953–958.
http://dx.doi.org/10.1017/S0025315409991391
Suárez-Morales, E., Harris, L., Ferrari, F.D. & Gasca, R. (2013b) Late postnaupliar development of Monstrilla sp. (Copepoda: Monstrilloida), a protelean endoparasite of benthic polychaetes. Invertebrate Reproduction and Development, 58, 60–73.
http://dx.doi.org.10.1080/07924259.2013.816787
Thompson, I.C. (1888) Copepoda of Madeira and the Canary Islands, with descriptions of new genera and species. Journal of the Linnean Society of London, Zoology, 20, 145–156.
Timm, R. (1893) Monstrilla grandis Giesbr., M. helgolandica Claus, Thaumaleus germanicus n.sp. Zoologischer Anzeiger, 16 (432), 418–420.
Üstün, F., Terbiyik Kurt, T. & Suárez-Morales, E. (2014) A new species of Cymbasoma (Copepoda, Monstrilloida) from the northern coast of Turkey (Black Sea) with comments on the C. longispinosum species-group. Crustaceana, 87, 1393–1410.
http://dx.doi.org/10.1163/15685403-00003363
Walter, T. (2015) Monstrilloida. In: Walter, T.C. & Boxshall, G. (2015) World of Copepods database. Accessed through: World Register of Marine Species. Available from: http://www.marinespecies.org/aphia.php?p=taxdetails&id=1106 (accessed 16 August 2015)
Wolfenden, R.N. (1906) Notes on the collection of Copepoda. In: Gardiner, S. (Ed.), Fauna and geography of the Maldive and Laccadive Archipelagoes. Vol. 2. University Press Cambridge, Cambridge, pp. 989–1040.