Invertebrate Systematics Invertebrate Systematics Society
Systematics, phylogeny and biogeography
RESEARCH ARTICLE

Cladistic analysis of the calanoid Copepoda

Janet M. Bradford-Grieve A E , Geoff A. Boxshall B , Shane T. Ahyong A C and Susumu Ohtsuka D
+ Author Affiliations
- Author Affiliations

A National Institute of Water and Atmospheric Research, PO Box 14901, Kilbirnie, Wellington 6241, New Zealand.

B Department of Zoology, Natural History Museum, Cromwell Road, London SW7 5BD, UK.

C Present address: Australian Museum, 6 College St, Sydney, NSW 2010, Australia.

D Faculty of Applied Biological Science, Hiroshima University, 4-4 Kagamiyama 1-chome, 739-8528 Higashi-Hiroshima, Japan.

E Corresponding author. Email: j.grieve@niwa.co.nz

Invertebrate Systematics 24(3) 291-321 https://doi.org/10.1071/IS10007
Submitted: 25 February 2010  Accepted: 8 July 2010   Published: 30 August 2010

Abstract

Calanoid copepods are extremely successful inhabitants of marine, brackish and freshwater plankton. Morphological data are used to arrive at a first, parsimony-based phylogeny for the calanoid copepods. Each family is represented by at least one exemplar, typically a recognised plesiomorphic species. The Epacteriscidae are sister to all other calanoid copepods – an observation that brings into question the concept of an Epacteriscoidea that includes the Ridgewayiidae. The monophyly of the Augaptiloidea, Centropagoidea, Clausocalanoidea and Pseudocyclopoidea is corroborated. The current analysis suggests there may be two major clades, one containing the Augaptiloidea, Centropagoidea and possibly the Pseudocyclopoidea and Ridgewayiidae and the other including the Megacalanidae, Calanidae/Paracalanidae, Bathypontioidea, Eucalanoidea, Ryocalanoidea, Spinocalanoidea and Clausocalanoidea. The relationships of the Pseudocyclopidae, Boholinidae, and Ridgewayiidae to the Centropagoidea/Augaptiloidea clade received low nodal support. Monophyly of an enlarged Bathypontioidea (including the Fosshageniidae) is proposed. A monophyletic Megacalanoidea is not retrieved. The nature of the inferred ancestral Calanoida is discussed. New evolutionary series are proposed for the female genitalia (including several losses and regaining of seminal receptacles, and independent losses of the genital operculum – once lost it is never regained) and leg 1 endopod. Paedomorphosis appears to be a dominant process in the evolution of the Calanoida.


Acknowledgements

The support of the National Institute of Water and Atmospheric Research (NIWA) for the senior author, as an emeritus researcher, is acknowledged. This work is partially supported by the New Zealand Foundation for Research Science and Technology contract number CO1X0502 and the NIWA Capability Fund.


References


Adamowicz S. J., Menu-Marque S., Herbert P. D. N., Purvis A. (2007) Molecular systematics and patterns of morphological evolution in the Centropagidae (Copepoda: Calanoida) of Argentina. Biological Journal of the Linnean Society. Linnean Society of London 90, 279–292.
CrossRef |

Andronov V. N. (1974) Phylogenetic relations of large taxa within the suborder Calanoida (Crustacea, Copepoda). Zoologicheskij Zhurnal [In Russian] 53(7), 1002–1012.

Andronov V. N. (1991) On renaming of some taxa in Calanoida (Crustacea).  Zoologicheskij Zhurnal [In Russian] 70, 133–134.

Andronov V. N. (1992) Ryocalanus admirabilis sp. n. (Copepoda, Calanoida, Ryocalanidae) from the central western Atlantic. Zoologicheskij Zhurnal [In Russian] 71(7), 140–144.

Andronov V. N. (2007) New genus and species of copepods (Crustacea, Calanoida) from the central-eastern Atlantic and problems of classification of the Superfamilies Pseudocyclopoidea and Epacteriscoidea.  Zoologicheskij Zhurnal [In Russian] 86, 671–683.

Barthélémy R.-M. (1999 a). Biologie de la reproduction des copépods calanoïdes: Biodiversité morphofonctionnelle et intérêt phylétique des structures génitales femelles données structurales, ultrastructurales et biochimiques sur les grandes associées. These pour obtenir le grade de Docteur de L’Université de Provence. 95 pp. 41 figs.

Barthélémy R.-M. (1999b) Functional morphology and taxonomic relevance of the female genital structures in Acartiidae (Copepoda: Calanoida). Journal of the Marine Biological Association of the United Kingdom 79, 857–870.
CrossRef |

Barthélémy R.-M., Cuoc C., Defaye D., Brunet M., Mazza J. (1998a) Female genital structures in several families of Centropagoidea (Copepoda: Calanoida). Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences 353, 721–736.
CrossRef |

Barthélémy R.-M., Ohtsuka S., Cuoc C. (1998b) Description and female genital structures of a new species of the demersal calanoid copepod Ridgewayia from southern Japan. Journal of Natural History, London 32, 1303–1318.
CrossRef |

Boxshall G. A. (1982) On the anatomy of the misophrioid copepods, with special reference to Benthomisophria palliata Sars. Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences 297, 125–181.
CrossRef |

Boxshall G. A. , and Halsey S. H. (2004). An introduction to copepod diversity. (The Ray Society: London.)

Boxshall G. A., Huys R. (1998) The ontogeny and phylogeny of copepod antennules. Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences 353, 765–786.
CrossRef |

Bradford J. M., Ohman M. O., Jillett J. B. (1988) Larval morphology and development of Neocalanus tonsus, Calanoides macrocarinatus, and Calanus australis (Copepoda: Calanoida) in the laboratory. New Zealand Journal of Marine and Freshwater Research 22, 301–320.
CrossRef |

Bradford-Grieve J. M. (1994) The marine fauna of New Zealand: Pelagic Calanoid Copepoda: Megacalanidae, Calanidae, Paracalanidae, Mecynoceridae, Eucalanidae, Spinocalanidae, Clausocalanidae. NIWA Biodiversity Memoirs 102, 1–160.

Bradford-Grieve J. M. (1999) The marine fauna of New Zealand: Pelagic Calanoid Copepoda: Arietellidae, Augaptilidae, Heterorhabdidae, Lucicutiidae, Metridinidae, Phyllopodidae, Centropagidae, Pseudodiaptomidae, Temoridae, Candaciidae, Pontellidae, Sulcanidae, Acartiidae, Tortanidae. NIWA Biodiversity Memoirs 111, 1–268.

Bradford-Grieve J. M. (2001) A new species of benthopelagic copepod of the genus Tharybis (Calanoida: Tharybidae) from the upper slope, northeastern New Zealand. New Zealand Journal of Marine and Freshwater Research 35, 421–433.
CrossRef |

Bradford-Grieve J. M. (2004) Two new species of Xanthocalanus and the first record of Brachycalanus (Copepoda: Calanoida: Phaennidae) from the upper slope, north-eastern New Zealand. New Zealand Journal of Marine and Freshwater Research 38(4), 621–647.
CrossRef |

Bradford-Grieve J. M. (2008) Mecynocera clausi I.C. Thompson, 1988 (Copepoda: Calanoida) is a paracalanid. Zootaxa 1852, 59–64.

Brodsky K. A. (1955) The Calanoida of the Kurile-Kamchatka Trench.  Trudy Instituta Okeanologii [In Russian] 12, 184–209.

Chang S., Johnston R. J., Hobert O. (2003) A transcriptional regulatory cascade that controls left/right asymmetry in chemosensory neurons of C. elegans. Genes & Development 17, 2123–2137.
CrossRef | PubMed |

Comita G. W., McNett S. J. (1976) The postembryonic development instars of Diaptomus oregonensis Lilljeborg, 1889 (Copepoda). Crustaceana 30(2), 123–163.
CrossRef |

Corkett C. J., McLaren I. A. (1979) The biology of Pseudocalanus. Advances in Marine Biology 15, 1–231.
CrossRef |

Costanzo G., Crescenti N., Zagami G. (2004) Postembryonic development of Pseudocyclops umbraticus Giesbrecht, 1893 (Copepoda, Calanoida) from coastal waters of Sicily. Crustaceana 77(1), 49–66.
CrossRef |

Cuoc C., Defaye D., Brunet M., Notonier R., Mazza J. (1997) Female genital structures of Metridinidae (Copepoda: Calanoida). Marine Biology 129, 651–665.
CrossRef |

Dallwitz M. J. , Paine T. A. , and Zurcher E. J. 1993 onwards. User’s guide to the DELTA System: a general system for processing taxonomic descriptions. Edn. 4. 136 pp. (CSIRO Division of Entomology: Canberra.)

Damkaer D. M. (1975) Calanoid copepods of the genera Spinocalanus and Mimocalanus from the central Arctic Ocean, with a review of the Spinocalanidae. NOAA Technical Report. NMFS Circular 391, 1–88.

Davis A. D., Weatherby T. M., Hartline D. K., Lenz P. H. (1999) Myelin-like sheaths in copepod axons. Nature 398, 571.
CrossRef | PubMed |

Dogiel V. A. (1954). Oligomerization of Homologous Organs as One of the Main Pathways of Animal Evolution. Leningrad State University. [Not seen]

Farris J. S. (1969) A successive approximations approach to character weighting. Systematic Zoology 18, 374–385.
CrossRef |

Ferrari F. D. (1985) Postnaupliar development of a looking-glass copepod Pleuromamma xiphias (Giesbrecht, 1889) with analysis of distribution of sex and asymmetry. Smithsonian Contributions to Zoology 420, i–iii, 1–55.

Ferrari F. D. (1995) Six copepodid stages of Ridgewayia klausruetzleri, a new species of copepod crustacean (Ridgewayiidae: Calanoida) from the barrier reef in Belize, with comments on appendage development. Proceedings of the Biological Society of Washington 108(2), 180–200.

Ferrari F. D., Benforado A. (1998) Setation and setal groups on antenna 1 of Ridgewayia klausruetzleri, Pleuromamma xiphias, and Pseudocalanus elongatus (Crustacea: Copepoda: Calanoida) during the copepodid phase of development. Proceedings of the Biological Society of Washington 111(1), 209–221.

Ferrari F. D., Dahms H.-U. (2007) Post-embryonic development of the Copepoda. Crustaceana Monographs 8, 1–229.
CrossRef |


Ferrari F. D., Markhaseva E. L. (1996) Parkius karenwishnerae, a new genus and species of calanoid copepod (Parkiidae, new family) from benthopelagic waters of the eastern tropical Pacific Ocean. Proceedings of the Biological Society of Washington 109(2), 264–285.

Ferrari F. D., Ueda H. (2005) Development of leg 5 of copepods belonging to the calanoid superfamily Centropagoidea (Crustacea). Journal of Crustacean Biology 25(3), 333–352.
CrossRef |

Fosshagen A., Iliffe T. M. (1985) Two new genera of Calanoida and a new Order of Copepoda, Platycopioida, from marine caves on Bermuda. Sarsia 70, 345–358.

Fosshagen A., Iliffe T. M. (1989) Boholina, a new genus (Copepoda: Calanoida) with two new species from an anchialine cavge in the Philippines. Sarsia 74, 201–208.

Fosshagen A., Iliffe T. M. (1991) A new genus of calanoid copepod from an anchialine cave in Belize. Bulletin of the Plankton Society of Japan 1991(Special), 339–346.

Fosshagen A., Iliffe T. M. (2004) A new species of cave-dwelling calanoid copepod from Grand Bahama. Sarsia 89, 346–354.
CrossRef |

Fosshagen A., Boxshall G. A., Iliffe T. M. (2001) The Epacteriscidae, a cave-dwelling family of calanoid copepods. Sarsia 86, 245–318.

Geletin Yu. V. (1976) The ontogenetic abdomen formation in copepods of genera Eucalanus and Rhincalanus (Calanoida, Eucalanidae) and new systems of these copepods. Issledovaniya Fauni Morei [English translation, NIWA, Wellington; original is in Russian] 18, 75–93.

Geptner M. V. (1968) Structure and taxonomic significance of the genital complex in copepods of the family Euchaetidae (Calanoida). Oceanology 8, 543–552.

Giesbrecht W. (1893) Systematik und Faunistik der pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres. Fauna und Flora des Golfes von Neapel und der Angrenzenden Meeres, Herausgegeben von der Zoologischen Station zu Neapel 19, 1–831.

Goetze E., Bradford-Grieve J. M. (2005) Description of Eucalanus spinifer T. Scott, 1894 (Copepoda: Calanoida), a circumglobal sister species of E. hyalinus s.s. (Claus, 1866). Progress in Oceanography 65, 55–87.
CrossRef |

Grice G. D., Hulsemann K. (1965) Abundance, vertical distribution and taxonomy of calanoid copepods at slected stations in the northeast Atlantic. Journal of Zoology 146, 213–262.
CrossRef |

Grice G. D., Hulsemann K. (1967) Bathypelagic calanoid copepods of the western Indian Ocean. Proceedings of the United States National Museum 122(3583), 1–67.

Gurney R. (1931). British fresh-water Copepoda 1. pp. 1–238. (Ray Society, London.)

Hartline D. K., Colman D. R. (2007) Rapid conduction and the evolution of giant axons and myelinated fibers. Current Biology 17(1), R29–R35.
CrossRef | PubMed |

Heron G. A., Bowman T. E. (1971) Postnaupliar developmental stages of the copepod crustaceans Clausocalanus laticeps, C. brevipes, and Ctenocalanus citer (Calanoida: Pseudocalanidae). Antarctic Research Series 17, 141–165.

Ho J. (1994) Copepod phylogeny: a reconsideration of Huys and Boxshall’s ‘parsimony versus homology’. Hydrobiologia 292/293, 31–39.
CrossRef |

Hulsemann K. (1991 a). Tracing homologies in appendages during ontogenetic development of Calanoid copepods. Bulletin of the Plankton Society of Japan, Special Volume, Proceedings of the Fourth International Conference on Copepoda, 105–114.

Hulsemann K. (1991b) The copepodid stages of Drepanopus forcipatus Giesbrecht, with notes on the genus and a comparison with other members of the family Clausocalanidae (Copepoda Calanoida). Helgolaender Meeresuntersuchungen 45, 199–224.
CrossRef |

Humes A. G. (1955) The postembryonic developmental stages of the fresh-water calanoid copepod, Epischura massachusettsensis Pearse. Journal of Morphology 96, 441–471.
CrossRef |

Huys R. , and Boxshall G. A. (1991). Copepod Evolution. (The Ray Society, London.)

ICZN (1985). International Code of Zoological Nomenclature. Third Edition. (International Trust for Zoological Nomenclature, London.)

ICZN (1988) Opinion 1503. Bulletin of Zoological Nomenclature 45(3), 228–229.

Jaume D., Boxshall G. A. (1995) Stygocyclopia balearica, a new genus and species of calanoid copepod (Pseudocyclopiidae) from anchihaline caves in the Balearic Islands (Mediterranean). Sarsia 80, 213–222.

Jaume D., Boxshall G. A. (1996) A new genus and two new species of cave-dwelling copepods from the Balearic Islands (Mediterranean). Journal of Natural History, London 30, 989–1006.
CrossRef |

Jaume D., Boxshall G. A., Gràcia F. (2008) Stephos (Copepoda: Stephidae) from Balearic caves (W Mediterranean). Systematics and Biodiversity 6, 503–520.
CrossRef |

Johnson M. W. (1934) The life history of the copepod Tortanus discaudatus (Thompson and Scott). The Biological Bulletin of Woods Hole 67, 182–200.
CrossRef |

Kršinić F. (2005) Speleohvarella gamulini gen. et sp. nov., a new copepod (Calanoida, Stephidae) from an anchialine cave in the Adriatic Sea. Journal of Plankton Research 27, 607–615.
CrossRef |

Lawson T. H., Grice G. D. (1970) The developmental stages of Centropages typicus Krøyer (Copepoda, Calanoida). Crustaceana 18(2), 187–208.
CrossRef |

Lawson T. H., Grice G. D. (1973) The developmental stages of Paracalanus crassirostris Dahl, 1894 (Copepoda, Calanoida). Crustaceana 24(1), 43–56.
CrossRef |

Lenz P. H., Hartline D. K., Davis A. D. (2000) The need for speed. I. Fast reactions and myelinated axons in copepods. Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology 186, 337–345.
CrossRef | PubMed |

Maddison D. R. , and Maddison W. P. (2000). MacClade 4: Analysis of Phylogeny and Character Evolution. CD-ROM. (Sinauer Associates, Sunderland, Massachusetts.)

Markhaseva E. L., Dahms H.-U. (2004) Plesioscolecithrix (Copepoda, Calanoida, Scolecitrichidae): a new genus, and new species from the high Antarctic Weddell Sea (Southern Ocean). Sarsia 89, 326–337.
CrossRef |

Markhaseva E. L., Kosobokova K. N. (2001) Arctokonstantinus hardingi (Copepoda, Calanoida, Arctokonstantinidae): new family, new genus, and new species from the bathypelagial Arctic Basin. Sarsia 86, 319–324.

Markhaseva E. L., Schulz K. (2006) Sensiava longiseta (Copepoda, Calanoida): a new genus and species from the abyss of the Weddell Sea. Zootaxa 1368, 1–18.

Markhaseva E. L., Schulz K. (2009) A new family and genus of calanoid copepods (Crustacea) from the abyss of the Atlantic Ocean. Zootaxa 2304, 21–40.

Markhaseva E. L., Schulz K., Martinez Arbizu P. (2009) New family of Crustacea (Calanoida) – Rostrocalanidae fam. nov.: making the name available. Zoosystemica Rossica 18, 318–319.

Martinez Arbizu P. (1997) Sarsicopia polaris gen. et sp. n., the Platycopioida (Copepoda: Crustacea) from the Arctic Ocean, and its phylogenetic significance. Hydrobiologia 350, 35–47.
CrossRef |

McKinnon A. D., Arnott G. H. (1985) The developmental stages of Gladioferens pectinatus (Brady, 1899) (Copepoda: Calanoida). New Zealand Journal of Marine and Freshwater Research 19, 21–42.
CrossRef |

Monchenko V. I., von Vaupel Klein J. C. (1999) Oligomerization in Copepoda Cyclopoida as a kind of orthogenetic evolution in the animal kingdom. Crustaceana 72(3), 241–264.
CrossRef |

Nicholls A. G. (1945) A new calanoid copepod from Australia. Annals and Magazine of Natural History 12(11), 501–514.

Nishida S. (1985) Pelagic copepods from Kabira Bay, Ishigaki Island, Southwestern Japan, with a description of a new species of the genus Pseudodiaptomus. Publications of the Seto Marine Laboratory 30, 3125–3144.

Nishida S. (1989) Distribution, structure and importance of the cephalic dorsal hump, a new sensory organ in calanoid copepods. Marine Biology 101, 173–185.
CrossRef |

Nishida S., Ohtsuka S. (1997) Ultrastructure of the mouthpart sensory setae in mesopelagic copepods of the family Scolecitrichidae. Plankton Biology and Ecology 44(1/2), 81–90.

Ohtsuka S. (1992) Tortanus (Acutanus) angularis, new subgenus and new species (Copepoda: Calanoida), from the Carribbean Sea, with remarks on the subgenera in the genus Tortanus. Proceedings of the Biological Society of Washington 105(2), 255–267.

Ohtsuka S., Huys R. (2001) Sexual dimorphism in calanoid copepods: morphology and function. Hydrobiologia 453/454, 441–466.
CrossRef |

Ohtsuka S., Mitsuzumi C. (1990) A new asymmetrical near-bottom calanoid copepod, Paramisophria platysoma, with observations of its integumental organs, behaviour and in-situ feeding habit. Bulletin of the Plankton Society of Japan 36, 87–101.

Ohtsuka S., Fosshagen A., Iliffe T. M. (1993a) Two new species of Paramisophria (Copepoda, Calanoida, Arietellidae) from anchialine caves on the Canary and Galapagos Islands. Sarsia 78, 57–67.

Ohtsuka S., Roe H. S. J., Boxshall G. A. (1993b) A new family of Calanoid copepods, the Hyperbionycidae, collected from the deep-sea hyperbenthic community in the northeastern Atlantic. Sarsia 78, 69–82.

Ohtsuka S., Boxshall G. A., Roe H. S. J. (1994) Phylogenetic relationships between arietellid genera (Copepoda: Calanoida), with the establishment of three new genera. Bulletin of the British Museum of Natural History (Zoology) 60, 105–172.

Ohtsuka S., Fosshagen A., Putchakarn S. (1999) Three new species of the demersal calanoid copepod Pseudocyclops from Phuket, Thailand. Plankton Biology and Ecology 46(2), 132–147.

Ohtsuka S., Kase T., Boxshall G. A. (2000) A new species of Ridgewayia (Copepoda: Calanoida) from a submarine cave in Palau, Western Atlantic. Species Diversity 5, 201–213.

Park T. S. (1966) The biology of a calanoid copepod Epilabidocera amphrites McMurrich. Cellule 66, 129–251.

Park T. S. (1986) Phylogeny of calanoid copepods. Syllogeus 58, 191–196.

Park T. (1995) Taxonomy and distribution of the marine calanoid copepod family Euchaetidae. Bulletin of the Scripps Institution of Oceanography. University of Southern California, San Diego 29, 1–203.

Park T. (2000) Taxonomy and distribution of the calanoid copepods family Heterorhabdidae. Bulletin of the Scripps Institution of Oceanography. University of Southern California, San Diego 31, 1–269.

Pinchuk A. I. (1997) Naupliar development of Metridia pacifica (Copepoda: Calanoida) reared in the laboratory. Journal of Crustacean Biology 17(2), 343–351.
CrossRef |

Reddy Y. R., Devi C. R. (1985) The complete postembryonic development of Megadiaptomus hebes Kiefer, 1936 (Copepoda, Calanoida) reared in the laboratory. Crustaceana 48(1), 40–63.
CrossRef |

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.

Sars G. O. (1902). Copepoda Calanoida. An account of the Crustacea of Norway, with short descriptions and figures of all the species 4, 29–144.

Sars G. O. (1903). Copepoda Calanoida. An account of the Crustacea of Norway, with short descriptions and figures of all the species 4, 145–171.

Sars G. O. (1924, 1925). Copépodes particulièrement bathypélagiques provenant des campagnes scientifiques du Prince Albert 1er de Monaco. Résultats des Campagnes Scientifiques Accompliés par le Prince Albert 1er de Monaco 69. Atlas 1924; text 1925.

Schulz K. (1981) Tharybis minor sp. n. (Copepoda: Calanoida: Tharybidae) aus dem nordwestafrikanischen Auftriebsgebiet mit Anmerkungen sur Gattung Tharybis Sars. Mitteilungen aus dem Hamburgischen zoologischen Museum und Institut 78, 169–171.

Schulz K. (1986) Temoropia setosa n. sp. (Copepoda: Calanoida: Temoridae) aus dem Kanarenstromgebeit (Nordost-Atlantik) mit Anmerkungen zur Gattung Temoropia T. Scott. Mitteilungen aus dem Hamburgischen zoologische Museum und Institut 83, 139–146.

Schulz K., Beckmann W. (1995) New benthopelagic tharybids (Copepoda: Calanoida) from the deep North Atlantic. Sarsia 80, 199–211.

Schulz K., Kwasniewski S. (2004) New species of benthopelagic calanoid copepods from Kongsfjorden (Spitsbergen, Svalbard Archipelago). Sarsia 89, 143–159.
CrossRef |

Shimode S., Toda T., Kikuchi T. (2000) Ryocalanus spinifrons, a new species of Ryocalanidae (Copepoda: Calanoida), from the southwestern part of Sagami Bay, Japan. Hydrobiologia 432, 131–133.
CrossRef |

Soh H. Y., Ohtsuka S., Imbayayshi H., Suh H.-L. (1999) A new deep-water calanoid copepod and the phylogeny of the genus Nullosetigera nom. nov. in the Nullosetigeridae nom. nov. (pro Phyllopus: Phyllopodidae) from Japanese waters. Journal of Natural History 33, 1581–1602.
CrossRef |

Suárez-Morales E., Iliffe T. M. (1996) New superfamily of Calanoida (Copepoda) from an anchialine cave in the Bahamas. Journal of Crustacean Biology 16, 754–762.
CrossRef |

Swofford D. L. (2002). Phylogenetic Analysis Using Parsimony (*and other methods) Version 4. Sinauer Associates, Sunderland, Massachusetts. Available at http://paup.csit.fsu.edu/Cmd_ref_v2.pdf

Tanimura A. (1992) Postembryonic development of Paralabidocera antarctic (I.C. Thompson) (Copepoda, Calanoida) from the fast ice near Syowa Station, Antarctica. Hydrobiologia 245, 109–128.
CrossRef |

Ueda H., Ohtsuka S. (1998) Redescription and taxonomic status of Sinodiaptomus valkanavi, a common limnoplanktonic calanoida copepod in Japan, with comparison to the closely related S. sarsi. Hydrobiologia 379, 159–168.
CrossRef |

Vyshkvartzeva N. V. (2003) A new bathypelagic copepod Pseudoamallothrix paralaminata sp. n. from the Arctic Basin and arguments for the transfer of Xanthocalanus soaresmoreirai Bjornberg, 1975 to the genus Pseudoamallothrix (Calanoida: Scolecitrichidae). Zoosystematica Rossica 12(1), 39–47.

Weatherby T. M., Davis A. D., Hartline D. K., Lenz P. H. (2000) The need for speed II. Myelin in calanoid copepods. Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology 186, 347–357.
CrossRef | PubMed |

Yeates D. K. (1995) Groundplans and exemplars: paths to the tree of life. Cladistics 11, 343–357.
CrossRef |








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