The Redescription of Mormonilla phasma Giesbrecht, 1891 (Copepoda: Mormonilloida) from the Northeastern Pacific

  • Published : 2007.03.01

Abstract

Mormonilla phasma is redescribed, based on the specimens from the Northeastern Pacific. M. phasma in the study area has the following morphological characteristics; second endopodal segment of mandible partly fused to basis and a distinct three-segmented exopod of mandible in anterior view and one indistinct segment in posterior view which are different from the description given by Boxshall (1979). In addition the first and the second endopodal segments of leg 1 were also separated indistinctly. Other morphological characteristics are similar to those reported in previous studies. The morphological anomalies in endopodal segments of the leg 1, unknown up to now are also discussed. This study is the first report on the distribution of M. phasma in the Northeastern Pacific.

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References

  1. Beckmann W. 1984, Mesozooplankton distribution on a transect from the Gulf of Aden to the central Red Sea during the winter monsoon, Oceanolog, Acta 7:87-102
  2. Boxshall GA, 1979. The planktonic copepods of the northeastern Atlantic Ocean: Harpacticoida, Siphonostomatoida and Mormonilloida, Bull. Br. Mus, nat. Hist. (Zool.) 35: 201-264
  3. Boxshall GA. 1985, The comparative anatomy of two copepods, a predatory calanoid and a particle-feeding Mormonilloid, Phil. Trans. R. Soc. (B) 311:303-377 https://doi.org/10.1098/rstb.1985.0155
  4. Boxshall GA. 1986, Phylogeny of Mormonilloida and Siphonostomatoida, Syllogeus 58: 173-176
  5. Boxshall GA and SH Halsey, 2004, An introduction to copepod diversity 1. Ray Society, London, 421 pp
  6. Chihara M and M Murano. 1997. An Illustrated guide to marine plankton in Japan. Tokai University Press, Tokyo, 1574 pp
  7. Razouls C. 1994. Manuel d'identification des principales especes de copepodes pelagigues antarctiques et subantarctiques. Ann. Inst. Oceanor. Paris 70:3-204
  8. Huys Rand GA Boxshall. 1991. Copepoda evolution. Ray Society, London, 468 pp
  9. Huys R, GA Boxshall and R Bottger-Schnack. 1992. On the discovery of the male of Mormonilla Giesbrecht, 1891 (Copepoda: Mormonilloida). Bull. Br. nat. Hist. (Zool.) 58: 157-170