Colossendeis species (Pycnogonida: Colossendeidae) collected during the Italica XIX cruise to Victoria Land (Antarctica), with remarks on some taxonomic characters of the ovigers
DOI:
https://doi.org/10.3989/scimar.2007.71n4661Keywords:
Pycnogonida, Colossendeidae, Colossendeis, SEM characters, benthic fauna, AntarcticaAbstract
The pycnogonid fauna of the genus Colossendeis collected during the Italica XIX cruise to Victoria Land (Ross Sea, Antarctica) was studied. A total of 19 specimens of six species were collected: Colossendeis australis (6), C. wilsoni (3), C. scotti (2), C. robusta (3), C. lilliei (2) and C. megalonyx (3). In the present contribution the observed variability of all collected Colossendeis species is described and illustrated. The previously synonymised C. lilliei is considered a different species from C. robusta. The observations made in this study lead us to discuss a controversy about the total number of oviger segments in this genus. Despite the currently established 10-segmented status, a short basal element is here considered to be a possible 11th segment. A detailed SEM study of the last oviger segment is carried out in all collected species, showing some intraspecific and the interspecific variability in the structures examined (shape and number of rows of compound spines, morphology of terminal claw, etc.). Finally, we discuss the taxonomic value of these characters of the last strigilis segment for distinguishing the Colossendeis species, and their possible utility in establishing internal phylogenetic relationships in future contributions.
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References
Arnaud, F. and R. Bamber. – 1987. The Biology of Pycnogonida. Adv. Mar. Biol., 24: 1-96. doi:10.1016/S0065-2881(08)60073-5
Arango, C.P. – 2002. Morphological phylogenetics of the sea spiders (Arthropoda: Pycnogonida). Org. Divers. Evol., 2: 107-125. doi:10.1078/1439-6092-00035
Arango, C.P. – 2003. Molecular approach to the phylogenetics of the sea spiders (Arthropoa: Pycnogonida) using partial sequences of nuclear ribosomal DNA. Mol. Phyl. Evol., 28: 588-600. doi:10.1016/S1055-7903(03)00069-1
Bouvier, E.L. – 1913. Pycnogonides du Pourquoi Pas? In: Calman WT (ed.), Deuxième Expédition Antarctique française (1908-1910), 6, pp. 1-169. Masson, Paris.
Calman, W.T. – 1915. Pycnogonida. British Antarctic (Terra Nova) Expedition, 1910. Zoology, 3(1): 1-74.
Child, C.A. – 1979. Shallow-Water Pycnogonids of the Isthmus of Panama and the Coasts of Middle America. Smithson. Contrib. Zool., 293: 1-86.
Child, C.A. – 1994a. Antarctic and Subantarctic Pycnogonida I. The Family Ammotheidae. In: S.D. Cairns (ed.), Biology of the Antarctic Seas XXIII, Antarc. Res. Ser., 63: 1-48.
Child, C.A. – 1994b. Antarctic and Subantarctic Pycnogonida II. The Family Austrodecidae. In: S.D. Cairns (ed.), Biology of the Antarctic Seas XXIII, Antarc. Res. Ser., 63: 49-99.
Child, C.A. – 1995a. Antarctic and Subantarctic Pycnogonida III. The Family Nymphonidae. In: S.D. Cairns (ed.), Biology of the Antarctic Seas XXIII, Antarc. Res. Ser., 69: 1-68.
Child, C.A. – 1995b. Antarctic and Subantarctic Pycnogonida IV. The Family Colosendeidae and Rhynchothoraxidae . In: S. D. Cairns (ed.), Biology of the Antarctic Seas XXIII, Antarc. Res. Ser., 69: 69-111.
Child, C.A. – 1995c. Antarctic and Subantarctic Pycnogonida V. The Family Pycnogonidae, Phoxilidiidae, Endeidae and Callipallenidae, including the genus Pallenopsis. In: S.D. Cairns (ed.), Biology of the Antarctic Seas XXIII, Antarc. Res. Ser., 69: 113-160.
Chimenz, C. and M.F. Gravina. – 2001. Faunistical and biological traits of some Antarctic Pycnogonida. Ital. J. Zool., 68: 335-344.
Fry, W.G. and J.W. Hedgpeth. – 1969. Pycnogonida, 1. Colossendeidae, Pycnogonidae, Endeidae, Ammotheidae. Fauna of the Ross Sea, 7. Mem. N. Z. Oceanogr. Inst., 49: 1-139.
Gordon, I. – 1932. Pycnogonida. Disc. Rep., 6: 1-138.
Gordon, I. – 1938. Pycnogonida. Sci. Rep. Australas. Antarc. Exp. Zool. Bot., 2: 1-40.
Gordon, I. – 1944. Pycnogonida. Rep. Br. Aust. N. Z. Exp.B, 5(1): 1-172.
Hodgson, T.V.-1907. Pycnogonida. National Antarctic Expedition 1901-1904. Reports of the National Antarctic expedition of 1901-1904. Nat. Hist., 3: 1-172.
Hodgson, T.V. – 1908. The Pycnogonida of the Scottish National Antarctic Expedition. Trans. Royal Soc. Edinburgh, 46: 159-188.
Hoek, P.P.C. – 1881. Report on the Pycnogonida dredged by HMS Challenger 1873-1876. Rep. Sci. Res. Challenger, 3(10): 1-167.
Munilla, T. – 1991. Picnogónidos capturados en la Campaña “Antártica 8611”. Bol. Inst. Esp. Oceanogr., 7: 3-44.
Munilla, T. – 1999. Evolución y Filogenia de los Picnogónidos. Bol. Soc. Ent. Aragonesa, 26: 273-279.
Pushkin, A.F. – 1993. The pycnogonida fauna of the South Ocean. Biological results of the soviet Antarctic expeditions. Explorations of the fauna of the seas XX(XXX): 1-397.
Stiboy-Risch, C. – 1993. Funde antarktischer und subantarktischer Pantopoden einschlie‚lich Colossendeis acuta sp.n. –sowie ein Beitrag zur Artbestimmung von Colossendeis glacialis Hodgson, 1907 und Colossendeis robusta Hoek, 1881. Mitt. Hamb. Zoo.l Mus. Inst. 90: 251-264.
Stock, J.H. – 1994. Indo-West Pacific Pycnogonida collected by some major oceanographic expeditions. Beaufortia, 44(3): 17-77.
Turpaeva, E.P. – 1974. The pycnogonida of the Scotia Sea and surrounding waters. Tr. Inst. Okeanol., Akad. Nauk. SSSR 98: 277-305.
Wilson, C.B. – 1881. Report on the Pycnogonida. Reports on the results of dreging, under the Supervision of Alexander Agassiz, along the East Coast of the United States, during the Summer of 1880, by the U.S. Coast Survey Steamer “Blake”. Bull. Mus. Comp. Zool. Harvard Univ., 8(12): 239-256.
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