Scientia Marina, Vol 72, No 4 (2008)

Leucon (Crymoleucon) rossi, a new species (Crustacea: Cumacea: Leuconidae) from the shelf waters of the Ross Sea (Antarctica), with a key to the genus Leucon south of 60°S


https://doi.org/10.3989/scimar.2008.72n4683

Peter Rehm
Alfred Wegener Institute for Polar and Marine Research (AWI), Marine Animal Ecology, Germany

Richard W. Heard
Department of Coastal Sciences, University of Southern Mississippi, United States

Abstract


A new leuconid cumacean, Leucon (Crymoleucon) rossi n. sp., is described from depths of 84 to 458 m in the Ross Sea off the Victoria Land coast. Leucon rossi n. sp. is distinguished from other members of the genus by a combination of characters including 1) a blunt, horizontally directed pseudorostrum without a distinctly protruding siphon; 2) strongly developed antennal notch; 3) entire dorsomedian margin of carapace appearing serrate, armed with 14 to 19 anteriorly curved spines in female (up to 21 in subadult males); 4) a small, but distinct, spine behind the frontal lobe; and 5) the uropodal peduncle slightly shorter than the exopod. After Leucon antarcticus Zimmer, 1907, L. rossi was the second most frequently occurring cumacean in the samples collected off Victoria Land. Statistical analyses showed significant differences in the proportion of carapace length and height of adult (all incubating in the present study) and immature females compared to immature males; no adult males were available for study.

Keywords


Crustacea; Cumacea; Leuconidae; Leucon rossi; new species; Antarctica; Ross Sea

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References


Bishop, J.D.D. – 1981. Two new Leuconids (Peracarida, Cumacea) of widespread occurrence from the deep Atlantic. Crustaceana, 40: 145-159. doi:10.1163/156854081X00552

Bishop, J.D.D. – 1982. Three new species of the genus Leucon Kröyer, 1846 (Crustacea: Cumacea) from the continental slope off Surinam. Zool. J. Linn. Soc., 74: 345-357. doi:10.1111/j.1096-3642.1982.tb01157.x

Coleman, C.O. – 2003. “Digital inking”: How to make perfect line drawings on computers. Org. Divers. Evol., Electronic Supplement, 14: 1-14 (http://senckenberg.de/odes/03-14.htm).

Coleman, C.O. – 2006. Substituting time-consuming pencil drawings in arthropod taxonomy using stacks of digital photographs. Zootaxa, 1360: 61-68.

Corbera, J. – 2000. Systematics and distribution of cumaceans collected during BENTART-95 cruise around South Shetland Islands (Antarctica). Sci. Mar., 64: 9-28.

Gamô, S. –1964. On three new species of Cumacea from the southern sea of Japan. Crustaceana, 7: 241-253. doi:10.1163/156854064X00443

Gamô, S. –1987. Cumacean crustaceans obtained by the 26th Japanese Antarctic research expedition (1984-1985), with descriptions of four new species. Proc. MOPR Symp. Polar Biol., 1: 145-160.

Jones, N.S. – 1971. The fauna of the Ross Sea. Part 8. Cumacea. NZ Dep. Sci. Industr Res. Bull., 206: 33-41.

Krøyer, H.N. – 1846. Om Cumaceernes Familie. Naturh. Tidsskr., (2)2: 123-211.

Ledoyer, M. – 1993. Cumacea (Crustacea) de la campagne EPOS 3du R.V. Polarstern en mer de Weddell, Antarctique. J. Nat. Hist., 27: 1041-1096. doi:10.1080/00222939300770661

Mühlenhardt-Siegel, U. – 1994. Leucon parasiphonatus, a new species (Crustacea: Cumacea: Leuconidae) from Antarctic waters. Helgol. Meeresunters., 48: 79-88 doi:10.1007/BF02366203

Mühlenhardt-Siegel, U. – 1996. Some remarks on the taxonomy of Antarctic Leuconidae (Cumacea: Crustacea) with a description of a new species Leucon intermedius n. sp. Helgol. Meeresunters., 50: 391-408. doi:10.1007/BF02367111

Mühlenhardt-Siegel, U. – 2005. New species of the family Nannastacidae (Crustacea: Peracarida: Cumacea) from the Angola Basin, south-eastern Atlantic. Deep-See Expedition DIVA-1.

Addendum. Mitt. hamb. zool. Mus. Inst., 102: 85-97. Rehm, P., S. Thatje, W.E. Arntz, A. Brandt and O. Heilmayer – 2006. Distribution and composition of macrozoobenthic communities along a Victoria-Land Transect (Ross Sea, Antarctica). Polar Biol., 29: 782–790.

Rehm, P., S. Thatje, U. Mühlenhardt-Siegel and A. Brandt – 2007. Composition and distribution of the peracarid crustacean fauna along a latitudinal transect off Victoria Land (Ross Sea, Antarctica) with special emphasis on the Cumacea. Polar Biol., 30: 871-881. doi:10.1007/s00300-006-0247-x

Sars, G.O. – 1878. Nye bidrag til kundskaben om Middelhavets Invertebratfauna. II. Middelhavets Cumaceer. Arch. Math. Naturv., 3: 461-512.

Sars, G.O. – 1887. Report on the Cumacea collected by H.M.S. Challenger during the years 1873-76. Rep. Sci. Res. Voyage H.M.S. Challenger, 19: 1-78.

Watling, L. – 1991. Revision of the cumacean family Leuconidae. J. Crust. Biol., 11: 569-582. doi:10.2307/1548527

Zimmer, C. – 1903. Die Cumaceen des Museums für Naturkunde in Berlin. Zoologische Jahrbücher. Abtheilung für Systematik, Geographie und Biologie der Thiere, 18: 664-694.

Zimmer, C. – 1907. Neue Cumaceen aus den Familien Diastylidae und Leuconidae von der Deutschen und Schwedischen Südpolar-Expedition. Zool. Anz., 31: 220-229.




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