The janirid isopods (Crustacea, Isopoda, Asellota) living on the sea star Echinaster brasiliensis Müller &amp; Troschel at São Sebastião channel, Southeastern brazilian coast, with description of a new species

Pires, Ana Maria Setubal

doi:10.1590/S0101-81751995000200008

Abstract

Three species of janirid isopods were found on the sea star Echinaster brasiliensis Müller & Troschel collected in São Sebastião Channel, southeastern Brazil. Janaira gracilis Moreira & Pires and Carpias nereus (Pires) were previously known from the area and Carpias asterophilus, sp.n. is described. The three isopod species were found together on the dorsal surface of the sea star, and juveniles performed nearly 73% of the population. The janirids presented homeochromy with the sea stars, and food and shelter were the observed benefits that the crustaceans received from the association. A key to separate the species of Carpias with a spoon-like gnathopod is included.

Isopoda; Asellota; Carpias; Janaira; Echinaster brasiliensis

The janirid isopods (Crustacea, Isopoda, Asellota) living on the sea star Echinaster brasiliensis Müller & Troschel at São Sebastião channel, Southeastern brazilian coast, with description of a new species

Ana Maria Setubal Pires

Instituto Oceanográfico, Universidade de São Paulo, Caixa Postal 9075, 01065-970 São Paulo, Brasil

ABSTRACT

Three species of janirid isopods were found on the sea star Echinaster brasiliensis Müller & Troschel collected in São Sebastião Channel, southeastern Brazil. Janaira gracilis Moreira & Pires and Carpias nereus (Pires) were previously known from the area and Carpias asterophilus, sp.n. is described. The three isopod species were found together on the dorsal surface of the sea star, and juveniles performed nearly 73% of the population. The janirids presented homeochromy with the sea stars, and food and shelter were the observed benefits that the crustaceans received from the association. A key to separate the species of Carpias with a spoon-like gnathopod is included.

Key words: Isopoda, Asellota, Carpias, Janaira, Echinaster brasiliensis

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Recebido em 15.IX.1994; aceito em 20.VIII.1995.

Bowman, T.E. & B.F. Morris. 1979. Carpias Richardson 1902, a senior synonym of Bagatus Nobili 1906, and the validity of Carpias minutus (Richardson, 1902) (lsopoda: Asellota: Janiridae). Proc. Biol. Soc. Wash. 92 (3):650-657.
Menzies, R.J. & P. Glynn. 1968. The common marine isopod Crustacea from Puerto Rico: a handbook for marine biologists. Stud. Fauna Curaçao and other Carib. Isl. 27:1-133.
Moreira P.S. 1973a. Arcturella sawayae, a new species of lsopoda Crustacea from southern Brazil. Bol. Zool. Biol. Mar., N.S. 30:185-194.
______. 1973b. Behavioral aspects of Arcturella sawayae Moreira, 1973 (Crustacea, lsopoda, Valvifera). Bol. Zool. Biol. Mar., N.S. 30:195-216.
______. 1973c. Food and feeding behavior of Arcturella sawayae Moreira, 1973 (Crustacea, lsopoda, Valvifera). Bol. Zool. Biol. Mar., N.S., (30):217-232.
Moreira, P.S. & A.M.S. Pires. 1977. Aspects of the breeding biology of Janaira gracilis Moreira & Pires (Crustacea, lsopoda, Asellota). Bolm Inst. oceanogr., São Paulo, 26:181-199.
Müller, H-G. 1990. Janiridae from the Caribbean Sea of N-Colombia. Senckenbergiana biol. 70:203-207.
______. 1992. Janirid from Malasyan coral reefs, with description of two new species of Bagatus Nobili, 1906 and Carpias Richardson, 1902 (Crustacea: lsopoda: Asellota). Mitt. zool. Mus. Berlin 68:331-43.
Pires, A.M.S. 1977a. Janaira gracilis, a new genus and species of janirid isopod from Brazil. Crustaceana 33 (1):23-32.
______. 1977b. Ciclo evolutivo e flutuação anual da população de Janaira gracilis (Crustacea, lsopoda, Asellota). Bolm. Inst, oceanogr., São Paulo, 26:201-217.
______. 1980a. Revalidation and redescription of the genus Carpias Richardson, 1902 (lsopoda, Asellota). Crustaceana 39 (1):95-103.
______. 1980b. New record of Sphaeromatidae (lsopoda) from the Brazilian southern coast: Dynamenella dianae (Menzies, 1962). Crustaceana 39 (2):133-140.
______. 1981a. Carpias harrieatae (lsopoda, Asellota), a new species from Florida. Crustaceana 40 (2):206-212.
______. 1981b. Ecological study on littoral and infralittoral isopods from Ubatuba, Brazil. Bolm Inst. oceanogr., São Paulo, 30:27-40.
______. 1982. Taxonomic revision of Bagatus (lsopoda, Asellota) with a discussion of ontogenetic polymorphism in males. J. nat. Hist. 16:227-259.
______. 1984. Taxonomic revision and phylogeny of the genus Erichsonella with a discussion on Ronalea (lsopoda, Valvifera). J. nat. Hist. 18:665-683.
Wilson, G.D.F. 1994. A phylogenetic analysis of the isopod family Janiridae (Crustacea). Invert. Taxon. 8:749-766.
Wilson, G.D.F. & J.-W. Wägele. 1994. Review of the family Janiridae (Crustacea: lsopoda: Asellota). Invert. Taxon. 8:683-747.

Publication Dates

Publication in this collection
21 July 2009
Date of issue
1995

History

Received
15 Sept 1994
Accepted
20 Aug 1995

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

[1] Bowman, T.E. & B.F. Morris. 1979. Carpias Richardson 1902, a senior synonym of Bagatus Nobili 1906, and the validity of Carpias minutus (Richardson, 1902) (lsopoda: Asellota: Janiridae). Proc. Biol. Soc. Wash. 92 (3):650-657.

[2] Menzies, R.J. & P. Glynn. 1968. The common marine isopod Crustacea from Puerto Rico: a handbook for marine biologists. Stud. Fauna Curaçao and other Carib. Isl. 27:1-133.

[3] Moreira P.S. 1973a. Arcturella sawayae, a new species of lsopoda Crustacea from southern Brazil. Bol. Zool. Biol. Mar., N.S. 30:185-194.

[4] ______. 1973b. Behavioral aspects of Arcturella sawayae Moreira, 1973 (Crustacea, lsopoda, Valvifera). Bol. Zool. Biol. Mar., N.S. 30:195-216.

[5] ______. 1973c. Food and feeding behavior of Arcturella sawayae Moreira, 1973 (Crustacea, lsopoda, Valvifera). Bol. Zool. Biol. Mar., N.S., (30):217-232.

[6] Moreira, P.S. & A.M.S. Pires. 1977. Aspects of the breeding biology of Janaira gracilis Moreira & Pires (Crustacea, lsopoda, Asellota). Bolm Inst. oceanogr., São Paulo, 26:181-199.

[7] Müller, H-G. 1990. Janiridae from the Caribbean Sea of N-Colombia. Senckenbergiana biol. 70:203-207.

[8] ______. 1992. Janirid from Malasyan coral reefs, with description of two new species of Bagatus Nobili, 1906 and Carpias Richardson, 1902 (Crustacea: lsopoda: Asellota). Mitt. zool. Mus. Berlin 68:331-43.

[9] Pires, A.M.S. 1977a. Janaira gracilis, a new genus and species of janirid isopod from Brazil. Crustaceana 33 (1):23-32.

[10] ______. 1977b. Ciclo evolutivo e flutuação anual da população de Janaira gracilis (Crustacea, lsopoda, Asellota). Bolm. Inst, oceanogr., São Paulo, 26:201-217.

[11] ______. 1980a. Revalidation and redescription of the genus Carpias Richardson, 1902 (lsopoda, Asellota). Crustaceana 39 (1):95-103.

[12] ______. 1980b. New record of Sphaeromatidae (lsopoda) from the Brazilian southern coast: Dynamenella dianae (Menzies, 1962). Crustaceana 39 (2):133-140.

[13] ______. 1981a. Carpias harrieatae (lsopoda, Asellota), a new species from Florida. Crustaceana 40 (2):206-212.

[14] ______. 1981b. Ecological study on littoral and infralittoral isopods from Ubatuba, Brazil. Bolm Inst. oceanogr., São Paulo, 30:27-40.

[15] ______. 1982. Taxonomic revision of Bagatus (lsopoda, Asellota) with a discussion of ontogenetic polymorphism in males. J. nat. Hist. 16:227-259.

[16] ______. 1984. Taxonomic revision and phylogeny of the genus Erichsonella with a discussion on Ronalea (lsopoda, Valvifera). J. nat. Hist. 18:665-683.

[17] Wilson, G.D.F. 1994. A phylogenetic analysis of the isopod family Janiridae (Crustacea). Invert. Taxon. 8:749-766.

[18] Wilson, G.D.F. & J.-W. Wägele. 1994. Review of the family Janiridae (Crustacea: lsopoda: Asellota). Invert. Taxon. 8:683-747.