Eocene relatives of cod icefishes (Perciformes: Notothenioidei) from Seymour Island, Antarctica

Małgorzata  Bieńkowska-Wasiluk; Niels Christensøn Bonde; Peter Rask Møller; Andrzej Gaździcki

doi:10.7306/gq.1112

Eocene relatives of cod icefishes (Perciformes: Notothenioidei) from Seymour Island, Antarctica

Małgorzata Bieńkowska-Wasiluk, Niels Christensøn Bonde, Peter Rask Møller, Andrzej Gaździcki

Geologi

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Abstract

Fragmentary skull bones and vertebra from the Upper Eocene La Meseta Formation on Seymour (Marambio) Island, Antarctic Peninsula have been described as gadiform fishes, informally named “Mesetaichthys”. Here we describe jaws as Mesetaichthys jerzmanskae n. g. and n. sp., and refer this taxon to the perciform suborder Notothenioidei. This group is almost unknown as fossils. Similarities to the living, ‘primitive’ nototheniid Dissostichus eleginoides are indicated in the dentition. Gadiform evolution in the Paleocene-Eocene, and the possibility of a correlation between the origin and evolution of notothenioids in connection with the deterioration of the climate in Antarctica during the Late Eocene-Oligocene is discussed.

Originalsprog	Engelsk
Tidsskrift	Geological Quarterly
Vol/bind	57
Udgave nummer	4
Sider (fra-til)	567–582
Antal sider	16
ISSN	1641-7291
DOI	https://doi.org/10.7306/gq.1112
Status	Udgivet - 3 jun. 2013

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Citationsformater

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title = "Eocene relatives of cod icefishes (Perciformes: Notothenioidei) from Seymour Island, Antarctica",

abstract = "Fragmentary skull bones and vertebra from the Upper Eocene La Meseta Formation on Seymour (Marambio) Island, Antarctic Pen i nsula have been described as gadiform fishes, informally named {"}Mesetaichthys{"}. Here we describe jaws as Mesetaichthys jerzmanskae n. gen. and n. sp., and refer this taxon to the perciform suborder Notothenioidei. This group is almost unknown as fossils. Similarities to the living, {"}primitive{"} nototheniid Dissostichus eleginoides are indicated in the dentition. Gadiform evolution in the Paleocene-Eocene is discussed, and the possibility of a correlation between the origin and evolution of notothenioids in connection with the deterioration of the climate in Antarctica during the Late Eocene-Oligocene is concluded.",

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language = "English",

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T1 - Eocene relatives of cod icefishes (Perciformes: Notothenioidei) from Seymour Island, Antarctica

AU - Bieńkowska-Wasiluk, Małgorzata

AU - Bonde, Niels Christensøn

AU - Møller, Peter Rask

AU - Gaździcki, Andrzej

PY - 2013/6/3

Y1 - 2013/6/3

N2 - Fragmentary skull bones and vertebra from the Upper Eocene La Meseta Formation on Seymour (Marambio) Island, Antarctic Pen i nsula have been described as gadiform fishes, informally named "Mesetaichthys". Here we describe jaws as Mesetaichthys jerzmanskae n. gen. and n. sp., and refer this taxon to the perciform suborder Notothenioidei. This group is almost unknown as fossils. Similarities to the living, "primitive" nototheniid Dissostichus eleginoides are indicated in the dentition. Gadiform evolution in the Paleocene-Eocene is discussed, and the possibility of a correlation between the origin and evolution of notothenioids in connection with the deterioration of the climate in Antarctica during the Late Eocene-Oligocene is concluded.

AB - Fragmentary skull bones and vertebra from the Upper Eocene La Meseta Formation on Seymour (Marambio) Island, Antarctic Pen i nsula have been described as gadiform fishes, informally named "Mesetaichthys". Here we describe jaws as Mesetaichthys jerzmanskae n. gen. and n. sp., and refer this taxon to the perciform suborder Notothenioidei. This group is almost unknown as fossils. Similarities to the living, "primitive" nototheniid Dissostichus eleginoides are indicated in the dentition. Gadiform evolution in the Paleocene-Eocene is discussed, and the possibility of a correlation between the origin and evolution of notothenioids in connection with the deterioration of the climate in Antarctica during the Late Eocene-Oligocene is concluded.

U2 - 10.7306/gq.1112

DO - 10.7306/gq.1112

M3 - Journal article

SN - 1641-7291

VL - 57

SP - 567

EP - 582

JO - Geological Quarterly

JF - Geological Quarterly

IS - 4

ER -

Eocene relatives of cod icefishes (Perciformes: Notothenioidei) from Seymour Island, Antarctica

Abstract

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