Eocene penguins of Seymour Island, Antarctica: Taxonomy

• Autorzy: Jadwiszczak P
• Języki publikacji: EN

Abstrakty

EN

Skeletal remains of penguins from the Eocene La Meseta Formation (Seymour Island, Antarctica) constitute the only extensive fossil record of Antarctic Sphenisciformes. No articulated skeletons are known, and almost all fossils occur as single isolated elements. Most of the named species are based on tarsometatarsi (for which the taxonomy was revised in 2002). Here, 694 bones (from the Polish collection) other than tarsometatarsi are reviewed, and allocated to species. They confirm previous conclusions and suggest that ten species grouped in six genera are a minimal reliable estimate of the Eocene Antarctic penguin diversity. The species are: Anthropornis grandis, A. nordenskjoeldi, Archaeospheniscus wimani, Delphinornis arctowskii, D. gracilis, D. larseni, Marambiornis exilis, Mesetaornis polaris, Palaeeudyptes gunnari and P. klekowskii. Moreover, diagnoses of four genera (Anthropornis, Archaeospheniscus, Delphinornis and Palaeeudyptes) and two species (P. gunnari and P. klekowskii) are supplemented with additional, non-tarsometatarsal features. Four species of the smallest penguins from the La Meseta Formation (D. arctowskii, D. gracilis, M. exilis and M. polaris) seem to be the youngest taxa within the studied assemblage - their remains come exclusively from the uppermost unit of the formation. All ten recognized species may have co-existed in the Antarctic Peninsula region during the Late Eocene epoch.

Słowa kluczowe

EN

paleontology; Eocene; bird; penguin; Seymour Island; La Meseta Formation; Antarctic; taxonomy; skeletal remains; fossil; Sphenisciformes; species diversity

• Wydawca: -
• Czasopismo: Polish Polar Research
• Rocznik: 2006
• Tom: 27
• Numer: 1
• Opis fizyczny: p.3-62,fig.,ref.

Twórcy

autor

Jadwiszczak P

• University in Bialystok, Swierkowa 20B, 15-950 Bialystok, Poland

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