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Palaeoapterodytes - Wikipedia

From Wikipedia, the free encyclopedia

Palaeoapterodytes Temporal range: late Oligocene or early Miocene
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Sphenisciformes
Family:	Spheniscidae
Genus:	†Palaeoapterodytes Ameghino 1905
Species:	†P. ictus
Binomial name
†Palaeoapterodytes ictus Ameghino, 1891
Synonyms
Apterodytes ictus

Palaeoapterodytes ictus is an extinct species of penguin from the late Oligocene or early Miocene of Argentina, the only member of its genus. Its fossil remains, consisting of only of a severely worn proximal part of a humerus, were found in the Patagonia Formation.

Ameghino named his genus Apterodytes (meaning "wingless diver", later emended to "ancient wingless diver" as the original name was preoccupied) because he mistakenly believed that this species lacked functional wings (the name is not to be confused with Aptenodytes, the modern emperor and king penguins). In this he seemingly overlooked the effects of taphonomy, and I will simply relay the summation of Lambrecht (1933), as translated from German by Simpson (1972):

"Ameghino believed that the humerus of this form was atrophied in such a way that only the proximal half remained, the distal part of the bone being wholly lost. If this were the case,... it would be one of the most interesting examples of extreme reversion of the capacity of flight, especially as the presumed atrophy affected only the distal part of the humerus while the proximal continued to be rather strongly developed. According to the illustration, the humerus seems merely to be weathered and the distal half simply broken off."

Simpson (1972) concluded that the meagre remnant assigned to this genus was unidentifiable (though, contrary to Brodkorb (1963), it was evidently not a junior synonym of Palaeospheniscus), and left Palaeoapterodytes to sink into nomen dubium status.

References

Simpson, G. G. 1972. Conspectus of Patagonian fossil penguins. American Museum Novitates 2488: 1–37.

External links

Palaeos.org Archived 2007-09-27 at the Wayback Machine

Genera of penguins, petrels, and albatrosses and their extinct allies

Kingdom: Animalia
Phylum: Chordata
Class: Aves
Infraclass: Neognathae
Clade: Austrodyptornithes

Sphenisciformes

incertae sedis

†Arthrodytes
†Aprosdokitos
†Kaiika
†Kumimanu
†Kupoupou
†Muriwaimanu
†Nucleornis
†Orthopteryx
†Pakudyptes
†Petradyptes
†Sequiwaimanu
†Tonniornis
†Waimanu
†Wimanornis

Spheniscidae

†Palaeospheniscinae	Eretiscus Palaeospheniscus
†Paraptenodytinae	Arthrodytes Paraptenodytes
†"Palaeeudyptinae"	Anthropodyptes Anthropornis Archaeospheniscus Delphinornis Marambiornis Mesetaornis Pachydyptes Palaeeudyptes Platydyptes
Spheniscinae	Aptenodytes Eudyptes Eudyptula †Madrynornis Megadyptes Pygoscelis Spheniscus

Procellariiformes

incertae sedis	†Kievornis †Lonchodytes? †Makahala
†Diomedeoididae	Diomedeoides Rupelornis
†Marinavidae	Marinavis
†Tytthostonychidae	Tytthostonyx
Diomedeidae	†Aldiomedes †Diomedavus Diomedea †Murunkus †Notoleptos Phoebastria Phoebetria †Plotornis Thalassarche †Tydea
Oceanitidae	Fregetta Garrodia Nesofregetta Oceanites Pelagodroma
Hydrobatidae	Hydrobates
Procellariidae	Aphrodroma Ardenna †Argyrodyptes Bulweria Calonectris Daption †Eopuffinus Fulmarus Halobaena Macronectes Pachyptila Pagodroma Pelecanoides †Primodroma Procellaria Pseudobulweria Pterodroma †Pterodromoides Puffinus Thalassoica

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