Species of Macrochiridothea Ohlin, 1901 (Isopoda, Valvifera) from southern Brazil, with notes on remaining species of the genus

Moreira, Plínio Soares

doi:10.1590/S0373-55241973000100002

Abstracts

This paper reports the species of Macrochiridothea occurring up to now on the continental shelf of southern Brazil. Two species are new to science: M. marcusi sp. n. and M. lilianae sp. n.. M. stebbingi Ohlin, 1901, is the third species reported for the area. The genus now comprises 8 species. A diagnosis for the genus, as well as for alI the species is given, together with comprehensive illustrations to permit prompt recognition of the species. Secondary sexual dimorphism is reported for the first time in the genus. A elassification key based on adults is furnished, and remarks or eomments for eaeh speeies are made. The geographie range for the genus has been considerably extended to the north, to about Lat. 23º07'S. General ecological and zoogeographieal remarks are made.

Tres espécies do gênero Macrochiridothea (Crustácea, Isopoda, Valvifera), são registradas na plataforma continental centro-sul do Brasil. Duas espécies são novas para a ciência: M. marcusi sp. n. e Af. lilianae sp. n.; Af. stebbingi Ohlin, 1901, e ocorrência nova para o Brasil. O limite N de distribuição do gênero e consideravelmente ampliado. São fornecidas diagnoses para o gênero e para todas as espécies que atualmente o compõem, juntamente com ilustrações que possibilitam seu pronto reconhecimento. Dimorfismo sexual secundário e relatado pela primeira vez no gênero. Ê dada uma chave de identificação para todas as espécies do gênero. Considerações ecológicas e zoogeograficas gerais completam o trabalho.

Species of Macrochiridothea Ohlin, 1901 (Isopoda, Valvifera) from southern Brazil, with notes on remaining species of the genus^* * Most of the studied material was gathered during the Ilha Grande Project, partially supported by Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); GEDIP Program, and the author's ISOTAN-DRAGA I Project.

Plínio Soares Moreira

Instituto Oceanográfico da Universidade de São Paulo

SYNOPSIS

This paper reports the species of Macrochiridothea occurring up to now on the continental shelf of southern Brazil. Two species are new to science: M. marcusi sp. n. and M. lilianae sp. n.. M. stebbingi Ohlin, 1901, is the third species reported for the area. The genus now comprises 8 species. A diagnosis for the genus, as well as for alI the species is given, together with comprehensive illustrations to permit prompt recognition of the species. Secondary sexual dimorphism is reported for the first time in the genus. A elassification key based on adults is furnished, and remarks or eomments for eaeh speeies are made. The geographie range for the genus has been considerably extended to the north, to about Lat. 23º07'S. General ecological and zoogeographieal remarks are made.

RESUMO

Tres espécies do gênero Macrochiridothea (Crustácea, Isopoda, Valvifera), são registradas na plataforma continental centro-sul do Brasil. Duas espécies são novas para a ciência: M. marcusi sp. n. e Af. lilianae sp. n.; Af. stebbingi Ohlin, 1901, e ocorrência nova para o Brasil. O limite N de distribuição do gênero e consideravelmente ampliado. São fornecidas diagnoses para o gênero e para todas as espécies que atualmente o compõem, juntamente com ilustrações que possibilitam seu pronto reconhecimento. Dimorfismo sexual secundário e relatado pela primeira vez no gênero. Ê dada uma chave de identificação para todas as espécies do gênero. Considerações ecológicas e zoogeograficas gerais completam o trabalho.

Full text available only in PDF format.

Texto completo disponível apenas em PDF.

ACKNOWLEDGEMENTS

I would like to acknowledge Drs. L. Forneris and L.R. Tommasi by providing specimens and information, and Dr. T.S. Bjornberg for the correction of the English manuscript. Thanks are also due to Miss L. Kanno, who inked the drawings, and to Messrs. C. de Jesus, A. Tararan and J. Lupi for their valuable help during my cruises aboard the R/V "Prof. W. Besnard".

LIST OF BENTHIC STATIONS AND SPECIES PRESENT^** ** Station data listed as follows: Station number; locality and/or latitude-longitude; date; depth; substrata; temperature, salinity and oxygen content of bottom water; vessel; collecting gear, and species present.

RIO DE JANEIRO

1. Sta. 12; Ilha Grande, off Ponta do Drago to NNW; December, 1965; 33 m; fine sand; 23.9ºC, 34.88; "Emília"; rectangular dredge.

M. marcusi sp. n.

M. lilianae sp. n.

2. Sta. 311; Ilha Grande Bay, off Mambucaba; 23º07'S, 44º29.5'W; February, 1968; 25 m; fine sand; R/V "Prof. W. Besnard"; photograb.

Af. marcusi sp. n.

SÃO PAULO

3. Ilha Anchieta, off Saco Grande to W; February, 1964; 12 m; shelly sand; 16.0ºC, 35.12, 3.9 ml/l; "Emília"; anchor dredge.

Af. lilianae sp. n.

4. Ilha Anchieta, off Ponta do Catimbau to W; February, 1964; 12 m; shelly sand; 14.6ºC, 35.12, 3.8 ml/l; "Veliger"; anchor dredge.

Af. lilianae sp. n.

5. Ilha Anchieta to SE; March, 1963; January-February, 1964; 12-21 m; shelly sand; 14.6ºC, 35.12; "Veliger"; anchor dredge, Van Veen 1/10.

Af. marcusi sp. n.

6. MBT Sta. 37, off Ponta Grossa; 23º51'S, 45º40'W; May, 1970 ; 22 m; fine sand; 22.30ºC, 34.40; R/V "Prof. W. Besnard"; MBT dredge.

M. marcusi sp. n.

RIO GRANDE DO SUL

7. MBT Sta. 129, off Tôrres to NW; 29º13'S, 49º25'W; June, 1970; 27 m; fine sand; 17.2ºC, 33.02; R/V "Prof. W. Besnard"; MBT dredge.

Af. marcusi sp. n.

M. lilianae sp. n.

8. GEDIP Sta. 410, off Arroio Chuí; 34º03'S, 52º07'W; October, 1968; 65 m; coarse sand; 11.7ºC, 33.46, 5.15 ml/l; R/V "Prof. W. Besnard"; triangular dredge.

Af. stebbingi Ohlin

REFERENCES

BASTIDA, R. & TORTI, M.R. 1969. Un nuevo isopodo del genero Macrochiridothea de las costas argentinas (Valvifera, Idoteidae). Neotropica, 15 (47):65-72, láms I-II.

HURLEY, D.E. & MURRAY, R.H. 1968. A new species of Macrochiridothea from New Zealand, with notes on the idotheid subfamily Chaetilinae (Crustacea Isopoda: Valvifera) Trans. R. Soe. N.Z. Zool., 10, ser, 26:241-249 figs 1-4

MENZIES, R.J. 1962. The zoogeography, ecology and systematics of the Chilean marine isopods. Rep. Lund Univ. Chile Exped. (42). Lunds Univ. arsskr. N.F. Avd. 2, 57(11):1-162, figs 1-51.

MOREIRA, P.S. 1966. Sobre especies da familia Serolidae (Isopoda, Flabellifera) do sublitoral norte do Estado de São Paulo. Universidade de São Paulo, Ph.D. Thesis. 175 p., XXX ests, 10 tbs. (Unpublished).

______ 1970. Espécies de Macrochiridothea (Crustacea, Isopoda, Valvifera) do litoral sul-brasileiro. IV Congresso Brasileiro de Zoologia, Curitiba, Paraná, Brasil.

NIERSTRASZ, H.F. von 1918. Alte and neue Isopoden. Zool. Meded., Leiden 4(2): 103-142, pls IX-X.

NORDENSTAM, A. 1933. Marine Isopoda of the families Serolidae, Idotheidae, Pseudidotheidae, Arcturidae, Parasellidae and Stenetriidae, mainly from the South Atlantic. Further zool. Results Swed. Antarct. Exped., 3(1):1-284, figs 1-78, pls I-II.

OHLIN, A. 1901. Isopoda from Tierra del Fuego and Patagonia. I, Valvifera. Svenska Exped. Magellans länd, 2 (11) :261-306, pls XX-XXV.

SHEPPARD, E.M. 1957. Isopod Crustacea. Part II. The Sub-order Valvifera. Families Idotheidae, Pseudidotheidae and Xenarcturidae fam. n., with a supplement to the isopod Crustacea. Part I. The family Serolidae. "Discovery" Rep., 29:141-198, pls VIII-IX.

STEBBINGI, Th. R.R. 1914. Crustacea from the Falkland Islands collected by Mr. Rupert Vallentin. Part II. Proc. zool. Soc. Lond. :341-378, pls I-IX.

Received August 17, 1971

BASTIDA, R. & TORTI, M.R. 1969. Un nuevo isopodo del genero Macrochiridothea de las costas argentinas (Valvifera, Idoteidae). Neotropica, 15 (47):65-72, láms I-II.
HURLEY, D.E. & MURRAY, R.H. 1968. A new species of Macrochiridothea from New Zealand, with notes on the idotheid subfamily Chaetilinae (Crustacea Isopoda: Valvifera) Trans. R. Soe. N.Z. Zool., 10, ser, 26:241-249 figs 1-4
MENZIES, R.J. 1962. The zoogeography, ecology and systematics of the Chilean marine isopods. Rep. Lund Univ. Chile Exped. (42).
Lunds Univ. arsskr. N.F. Avd. 2, 57(11):1-162, figs 1-51.
MOREIRA, P.S. 1966. Sobre especies da familia Serolidae (Isopoda, Flabellifera) do sublitoral norte do Estado de São Paulo. Universidade de São Paulo, Ph.D. Thesis. 175 p., XXX ests, 10 tbs. (Unpublished).
______ 1970. Espécies de Macrochiridothea (Crustacea, Isopoda, Valvifera) do litoral sul-brasileiro. IV Congresso Brasileiro de Zoologia, Curitiba, Paraná, Brasil.
NIERSTRASZ, H.F. von 1918. Alte and neue Isopoden. Zool. Meded., Leiden 4(2): 103-142, pls IX-X.
NORDENSTAM, A. 1933. Marine Isopoda of the families Serolidae, Idotheidae, Pseudidotheidae, Arcturidae, Parasellidae and Stenetriidae, mainly from the South Atlantic. Further zool. Results Swed. Antarct. Exped., 3(1):1-284, figs 1-78, pls I-II.
OHLIN, A. 1901. Isopoda from Tierra del Fuego and Patagonia. I, Valvifera. Svenska Exped. Magellans länd, 2 (11) :261-306, pls XX-XXV.
SHEPPARD, E.M. 1957. Isopod Crustacea. Part II. The Sub-order Valvifera. Families Idotheidae, Pseudidotheidae and Xenarcturidae fam. n., with a supplement to the isopod Crustacea. Part I. The family Serolidae. "Discovery" Rep., 29:141-198, pls VIII-IX.
STEBBINGI, Th. R.R. 1914. Crustacea from the Falkland Islands collected by Mr. Rupert Vallentin. Part II. Proc. zool. Soc. Lond. :341-378, pls I-IX.

*

Most of the studied material was gathered during the Ilha Grande Project, partially supported by Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); GEDIP Program, and the author's ISOTAN-DRAGA I Project.

**

Station data listed as follows: Station number; locality and/or latitude-longitude; date; 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
1973

History

Received
17 Aug 1971

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

[1] BASTIDA, R. & TORTI, M.R. 1969. Un nuevo isopodo del genero Macrochiridothea de las costas argentinas (Valvifera, Idoteidae). Neotropica, 15 (47):65-72, láms I-II.

[2] HURLEY, D.E. & MURRAY, R.H. 1968. A new species of Macrochiridothea from New Zealand, with notes on the idotheid subfamily Chaetilinae (Crustacea Isopoda: Valvifera) Trans. R. Soe. N.Z. Zool., 10, ser, 26:241-249 figs 1-4

[3] MENZIES, R.J. 1962. The zoogeography, ecology and systematics of the Chilean marine isopods. Rep. Lund Univ. Chile Exped. (42).

[4] Lunds Univ. arsskr. N.F. Avd. 2, 57(11):1-162, figs 1-51.

[5] MOREIRA, P.S. 1966. Sobre especies da familia Serolidae (Isopoda, Flabellifera) do sublitoral norte do Estado de São Paulo. Universidade de São Paulo, Ph.D. Thesis. 175 p., XXX ests, 10 tbs. (Unpublished).

[6] ______ 1970. Espécies de Macrochiridothea (Crustacea, Isopoda, Valvifera) do litoral sul-brasileiro. IV Congresso Brasileiro de Zoologia, Curitiba, Paraná, Brasil.

[7] NIERSTRASZ, H.F. von 1918. Alte and neue Isopoden. Zool. Meded., Leiden 4(2): 103-142, pls IX-X.

[8] NORDENSTAM, A. 1933. Marine Isopoda of the families Serolidae, Idotheidae, Pseudidotheidae, Arcturidae, Parasellidae and Stenetriidae, mainly from the South Atlantic. Further zool. Results Swed. Antarct. Exped., 3(1):1-284, figs 1-78, pls I-II.

[9] OHLIN, A. 1901. Isopoda from Tierra del Fuego and Patagonia. I, Valvifera. Svenska Exped. Magellans länd, 2 (11) :261-306, pls XX-XXV.

[10] SHEPPARD, E.M. 1957. Isopod Crustacea. Part II. The Sub-order Valvifera. Families Idotheidae, Pseudidotheidae and Xenarcturidae fam. n., with a supplement to the isopod Crustacea. Part I. The family Serolidae. "Discovery" Rep., 29:141-198, pls VIII-IX.

[11] STEBBINGI, Th. R.R. 1914. Crustacea from the Falkland Islands collected by Mr. Rupert Vallentin. Part II. Proc. zool. Soc. Lond. :341-378, pls I-IX.