Species of Eurydice (Isopoda, Flabellifera) from southern Brazil

Species of Eurydice (Isopoda, Flabellifera) from southern Brazil^*

Plínio Soares Moreira

Instituto Oceanográfico da Universidade de São Paulo

SYNOPSIS

This paper reports species of Eurydice (Isopoda, Flabellifera) occurring on the continental shelf of southern Brazil, from lat. 22º00'S. Three species are recorded. E. littoralis (Moore, 1902), is a new occurrence from Brazil. Detailed illustrations and new morphologi cal data are furnished for this species hitherto inadequately described. E. elongata sp. n. and E. emarginata sp. n., are new to science. The flagellar process on the antenna 2, reported in three species of Eurydice, seems to be an exclusively male characteristic, and probably it will also occur in the males of most of the already described species. Genus and species diagnosis are provided, together with a classification key for all species recorded up to date from southern Brazil. All available distributional and ecological infor mation completes the account of each species.

RESUMO

No presente trabalho faz-se um levantamento das especies do genero Eurydice (Isopoda, Flabellifera) ocorrendo na plataforma continental centrosul do Brasil, a partir da Lat. 22º00'S. Tres especies são assinaladas para a região: E. littoralis (Moore, 1902), E. elongata sp. n. e E. emarginata sp.n. Novos dados morfológicos e detalhadas ilustrações são apresentadas para a especie E. littoralis. O processo flagelar da antena 2, observado em tres especies de Eurydice, parece constituir uma característica exclusiva dos machos, donde se pressupõe possa também ser encontrado em outros machos de espécies já descritas. São fornecidas diagnoses para o gênero e espécie, assim como urna chave de classificação para todas as especies tratadas. Tanto quanto possível, observações ecológicas completam a descrição das especies.

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ACKNOWLEDGEMENTS

I wish to express my special thanks to Dr. E. Nonato, Dr. L.B. Miranda, Mr. M. Iwai and Mr. Y. Matsuura, for providing specimens and information. I am grateful to M. Sc. F.R. Shaffer for the correction of the English manuscript, and to Miss L. Kanno, who inked the drawings. Finally, I am indebted to Dr. Y. Wakabara, and to Messrs. C. de Jesus, J. Lupi and A. Tararan for their valuable help during my cruises aboard the R/V "Prof. W. Besnard" and "Emilia".

LIST OF STATIONS AND SPECIES PRESENT^**

RIO DE JANEIRO

1. Sta. II; 22º15.5'S -40º54.5'W; February,1969; 11:25 h; 51 m; coarse sand; 15.63ºC, 35.78‰; 4.13 ml/1; R/V "Prof. W. Besnard"; circular dredge.

E. elongata sp. n.

2. Sta. 1138; 22º24'S -40º59'W; August, 1970; 23:00 h; 57-62 m; coarse sand; 15.52ºC, 35.61‰; 4.96 ml/1; R/V "Prof. W. Besnard"; beam trawl.

E. elongata sp. n.

3. Sta. L-269; 23º14'S -44º12'W; November, 1969; 19:10 h; local depth: + 45 m; sampling depth:35 m - surface; temperature: 35 m = 18.41ºC; surface = 23.46ºC; R/V "Prof. W. Besnard"; zooplankton net, vertical haul.

E. elongata sp. n.

4. Sta. P.20.1; 23 16'S - 44 09'W; January, 1970 ; 22: 30 h; 50 m; sand with silt; 19.61ºC, 36.04‰; R/V "Prof. W. Besnard"; Foe rster-Petersen grab type.

E. elongata sp. n.

SÃO PAULO

5. Lamberto beach, Enseada do Flamengo, Ubatuba, alongside the pier of the Base Norte of the Instituto Oceanógrafico, USP; local depth: 2 m; night surface plankton, using an electric light as a lure; hand net.

Data Time Species collected October, 1968 21:00 h E. littoralis October, 1969 22:15 h E. littoralis and E. emarginata sp. n. January, 1970 22:30 h E. littoralis October, 1970 23:00 h E. littoralis

6. Sta. V-65.8; Saco Grande, Enseada da Fortaleza, Ubatuba; February, 1965; 14:00 h; shelly fine sand with silt; 10 m; 25.8ºC, 34.78‰; 4.03 ml/1; "Veliger"; "Calypso dredge", modified.

E. littoralis

7. MBT Sta. 51; 23º30'S - 44º49'W; May, 1970 ; 03:00 h; 42 m; shelly sand with silt; 14.95ºC, 35.51‰; 3.92 ml/1; R/V "Prof. W. Besnard"; MBT dredge.

E. elongata sp. n.

8. Sta. E.65.8; Enseada das Palmas, Ilha Anchieta; 23º32'S -45º04'W; May, 1965; 23:00 h; 5 m; 24.9ºC; 4.40 ml/1; night plankton haul, using an electric light as a lure; hand net; "Emilia".

E. littoralis

9. MBT Sta. 50; 23º39'S -45º06'W; May, 1970; 11:00 h; 28 m; calcareous sand with silt; 19.98ºC, 35.59‰; R/V "Prof. W. Besnard"; MBT dredge.

E. elongata sp.n.

10. Sta. E.65.5; nearby Ilha da Vitoria; 23º42'S -45º04'W; May,1965;08:25 h; 40 m; clay; 23.8ºC; "Emilia"; "Calypso dredge", modified.

E. littoralis

11. MBT Sta. 91; 25º13'S -47º29'W; June, 1970 ; 32 m; 03:55 h; compact fine sand; 19.70ºC, 35.85‰; 4.36 ml/1; R/V "Prof. W. Besnard"; MBT dredge.

E. littoralis

REFERENCES

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______ 1949. Données sur la faune carcinologique de la Mer Noire le long de la cote Bulgare. Trav. Stn. Marit. Varna (Bulgarie), 14:13-17, figs. 25-34.

FAGE, L. 1933. Pêches planetoniques a la lumière effectuées a Banyuls-sur-Mer et a Concarneau. III. Crustacés. Archs. Zool. exp. gén., 76 (3); 110-127, 184-196, fig. 9.

FISH, S. 1970. The biology of Eurydice pulchra (Crustacea: Isopoda). J. mar. biol. Ass. U.K., 50:753-768.

HANSEN, H.J. 1905. Revision of the European marine forms of the Cirolaninae, a subfamily of Crustacea, Isopoda. J. Linn. Soc. Zool., 29:337373, pis. 33-35.

JONES, D.A. 1969. The genus Eurydice (Crustacea, Isopoda) in the Aegean Sea, including E. longispina sp. nov. Cah. Biol, mar., 10:15-29, figs. 1-4.

______ 1970. Factors affecting the distribution on the intertidal isopods Eurydice pulchra Leach and E. affinis Hansen in Britain. J. Anim. Ecol. , 39 (2):455-472, figs. 1-8.

______ & NAYLOR, E. 1967. The distribution of Eurydice (Crustacea: Isopoda) in British Waters, including E. affinis new to Britain. J. mar. biol. Ass. U.K., 47:373-382, figs. 1-2.

______ & ______ 1970. The swimming rhythm of the Sand beach isopod Eurydice pulohra. J. exp. mar. Biol. Ecol., 4:188-199, figs. 1-8.

MACQUART-MOULIN, CI. 1969. Les isopodes Cirolanidae, Cymothoidae, Sphaeromidae, et Idoteidae dans le plancton du Golfe de Marseille. Tethys , 1 (2):261-270.

MAKKAVEYEVA, E.B. 1968. Species composition and distribution of Tanaidacea and Isopoda in the coastal region of Cuba. Inst. Biol. Juznyh îlorej Akad. A. O. Kovalevskogo , Kiev, Vypusk 11:99-105 , figs. 1-2 (in Russian).

MENZIES, R.J. & BARNARD, J.L. 1959. Marine Isopoda on coastal shelf of southern California: systematics and ecology. Pacif. Nat., 1 (11-12) :3-35, figs. 1-28.

______ & FRANKENBERG, D. 1966. Handbook on the common marine isopod Crustacea of Georgia. Athens, Univ. Georgia Press, 93 p., figs. 1-27.

______ & GLYNN, P.W. 1968. The common marine isopod Crustacea of Puerto Rico. Etud. Fauna Curaçao, 27:1-133, figs. 1-43.

MOORE, H.F. 1902. Report on Porto Rican Isopoda. Bull. U.S. Fish. Commn., 1900, 20, pt. 2:161-176, pis. 7-11 (not seen).

NAYLOR, E. 1957. Isopoda. Fich. Ident. Zooplankton, Sheet 78:1-4, figs. 1-18.

RICHARDSON, H. 1905. Monograph of the Isopods of North America. Bull. U. S. natn. Mus., no. 54, p. VII-LIII:1-727 , figs. 1-740.

SCHULTZ, G.A. 1966. Submarine canyons of southern California. Part IV. Systematics: Isopoda. Allan Hancock Pacif. Exp., 27 (4):1-56, pis. 1-15.

SOIKA, G.A. 1955. Éthologie, écologie, systematique et biogéographie des Eurydice s. str. (Isopoda, Cirolanides). Vie Milieu, 6 (1):38-52, figs. 1-7.

TATTERSALL, W.M. 1911. Die Nordischen Isopoden. Nord. Plankt., 6:181313, figs. 1-340.

VANHÖFFEN, E. 1914. Die Isopoden der Deutschen Südpolar-Expedition 1901-1903. Dt. Südpol.-Exped., 15, Zool. 7:449-598, figs. 1-132.

Received August 20, 1971

*

Part of material studied was gathered during the author's ISOTAN-DRAGA I Program.

**

Station data listed as follows: Station number; locality and/or latitude-longitude; date; time; depth; substrata; temperature, salinity and oxygen content of bottom water; vessel; collecting gear, and species present.

Publication Dates

• Publication in this collection
  11 June 2012
• Date of issue
  1972

History

• Received
  20 Aug 1971