Resumo
A female Blainville's beaked whale, Mesopiodon densirostris, 4.4m long was found stranded at 42km, South of Cassino, Rio Grande do Sul, Brazil. The triangular shape and dimensions of the pair of unerupted teeth (60 x 45 x 11 mm) in the lower jaw, together with the distance (180mm) from the alveoli to the hinder edge of the mandibular symphysis proved to be a good systematic character for females of this species. The vertebral formula is C 7 + D 10 + L 11 + Ca 15 (+2) =45. It presents 10 pairs of ribs, 6 being double headed. M. densirostris is the only species of Mesopiodon which seems normally to occur both north and south of the equator and also the onlv species of this genus to strand on oceanic island of tropical and warm-temperature waters. The present record is the first for the Soutn West Atlantic waters.
ARTIGOS
Mesoplodon densirostris (Cetacea, Ziphiidae), primeiro registro para o Atlântico Sul Ocidental* * Contribuição da Base Oceanográfica Atlântica, nº 7.
Hugo P. Castello; Maria Cristina Pinedo
Base Oceanógrafica Atlántica, Fundação Universidade de Rio Grande, Rio Grande, RS, Brasil
SYNOPSIS
A female Blainville's beaked whale, Mesopiodon densirostris, 4.4m long was found stranded at 42km, South of Cassino, Rio Grande do Sul, Brazil. The triangular shape and dimensions of the pair of unerupted teeth (60 x 45 x 11 mm) in the lower jaw, together with the distance (180mm) from the alveoli to the hinder edge of the mandibular symphysis proved to be a good systematic character for females of this species. The vertebral formula is C 7 + D 10 + L 11 + Ca 15 (+2) =45. It presents 10 pairs of ribs, 6 being double headed. M. densirostris is the only species of Mesopiodon which seems normally to occur both north and south of the equator and also the onlv species of this genus to strand on oceanic island of tropical and warm-temperature waters. The present record is the first for the Soutn West Atlantic waters.
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Bibliografia
- CARVALHO, J. P. 1969. Sobre a provável ocorrência de "Baleia de Cuvier" no litoral de São Paulo. Rev. nac. Pesca, 10(82):8-11.
- DAVIES, J.L. 1963. The antitropical factor in Cetacean speciation. Evolution, 17(1):107-116.
- DE CARLI, M.J. URQUIOLA DE & ARAMAYO, SA. 1970. Descripción de um Mesoplodon sp. hallado en la localidad de Quequén, Pcia. de Buenos Aires. Neotropica, 16(51):107-118, fig. 5.
- DE CARLI, M.J. URQUIOLA DE, ARAMAYO, S.A. & PINERO, M. Sobre el hallazgo de Mesoplodon grayi en la playa de Monte Hermoso, Pcia. de Buenos Aires. An. Com. Inv. Cient. Pcia. de Buenos Aires, La Plata (manuscrito).
- GIANUCA, N.M. & CASTELLO H.P. First record of the southern bottle-nose whale, Hyperoodon planifrons, from Rio Grande do Sul, Brazil (Cetácea, Ziphiidae). Sci. Rep. Whales Res. Inst. Japan, (29):107-111.
- KASUYA, T. & NISHIWAKI M. 1971. First record of Mesoplodon densirostris from Formosa. Sci. Rep. Whales Res. Inst. Japan, (23):129-137.
- LEATHERWOOD, S.; CALDWELL, D.K. & WINN, H.E. 1976. Whales, dolphins and porpoises of the Western North Atlantic. A guide to their identification. N.O.A.A. Tech. Rep. N.M.F.S. Circ.(396):1-173.
- McCANN, CH. 1974. Body scarring on cetacean odontocets. Sci. Rep. Whales Res. Inst. Japan, (26):145-155.
- MOORE, J.C. 1966. Diagnoses and distributions of beaked whales of the genus Mesoplodon: known from North American waters. In: Norris, K., ed. - Whales, dolphins and porpaises. Berkeley, Univ. of California Press, 789p.
- PRADERI, R. 1972. Notas sobre un ejemplarde Mesoplodon layardi (Gray) (Cetácea, Hyperoodontidae) de la costa Atlántica del Uruguay. Com Zool. Mus. Hist. Nat. Montevideo, 10(137):1-7.
- RAVEN, H.C. 1942. On the structure of Mesoplodon densirostris, a rare beaked whale. Bull. Amer. Mus. Nat. Hist., 80:23-50.
- ROSS, G.J.B. Chapter about Mesoplodon densirostris. (Tese não publicada).
Datas de Publicação
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Publicação nesta coleção
06 Jun 2012 -
Data do Fascículo
1980
