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Occurrence of acanthocephalans in notothenioid fishes in the Beagle Channel [Magellanic sub-region, Sub-Antarctic]

100%

Laskowski Z., Zdzitowiecki K.

Polish Polar Research

2009

tom 30

nr 2

179-186

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Africanacetus from the sub-Antarctic region: The southernmost record of fossil beaked whales

80%

Gol'din P. E., Vishnyakova K. A.

Acta Palaeontologica Polonica

2013

tom 58

nr 3

We report two partial skulls of fossil beaked whales (Odontoceti, Ziphiidae) of uncertain age trawled from the sea floor of the sub−Antarctic Indian Ocean (58 to 60S), representing the southernmost record of the family. The skulls possess diag− nostic features of the genus Africanacetus, several specimens of which have been recovered from the sea floor off South Africa, but differ from the type and only known species Africanacetus ceratopsis in their larger size. This difference may either reflect intraspecific variation or indicate the existence of a hitherto unrecognised species. The two specimens are characterised by unusually developed mesorostral ossifications, combined with maxillary crests occurring in the facial re− gion. Both of the latter are found in a range of extant and extinct ziphiids, and known to be sexually dimorphic in extant beaked whales. These structures may be the result of hypermorphosis driven by sexual selection, and could be involved in male−specific behaviour.

List of the insect specimens collected by the Deutsche Sudpolar Expedition preserved in the Collection of the Museum and Institute of Zoology Polish Academy of Sciences in Warsaw

80%

Jadwiszczak A.

Bulletin of the Museum and Institute of Zoology

1996

tom 01

Ograniczanie wyników

1 Acta Palaeontologica Polonica

1 Bulletin of the Museum and Institute of Zoology

1 Polish Polar Research

1 Gol'din P. E.

1 Jadwiszczak A.

1 Laskowski Z.

1 Vishnyakova K. A.

1 Zdzitowiecki K.

1 2013

1 2009

1 1996

Wyniki wyszukiwania

Occurrence of acanthocephalans in notothenioid fishes in the Beagle Channel [Magellanic sub-region, Sub-Antarctic]

Africanacetus from the sub-Antarctic region: The southernmost record of fossil beaked whales

List of the insect specimens collected by the Deutsche Sudpolar Expedition preserved in the Collection of the Museum and Institute of Zoology Polish Academy of Sciences in Warsaw