Results 21 to 30 of about 39 (34)

Evolution of the brain and sensory organs in Sphenisciformes: new data from the stem penguin Paraptenodytes antarcticus

, 2012
Penguins have undergone dramatic changes associated with the evolution of underwater flight and subsequent loss of aerial flight, which are manifest and well documented in the musculoskeletal system and integument.
Ksepka, D T, Walsh, Stig A, Revan, A, Balanoff, Amy M, Ho, A   +4 more
core   +1 more source

Fig. 22. Strict consensus tree from 2004 in Redescription and Phylogenetic Position of the Early Miocene Penguin Paraptenodytes antarcticus from Patagonia

, 2006
Fig. 22. Strict consensus tree from 2004 trees of 148 steps, osteological dataset. Absolute Bremer values are above branches, relative values are below branches. Bremer values were calculated from a sample of 16,000 trees (see Methods). CI 5 0.60, RI 5 0.
Giannini, Norberto P., Ksepka, Daniel T., Bertelli, Sara   +2 more
core   +1 more source

Fossil penguins [PDF]

, 1972
37 p. : ill. ; 24 cm.Includes bibliographical references (p. 35-37)."The known fossil penguins of Argentina are all from the Patagonia Formation, mostly from its basal part, in Chubut and Santa Cruz, probably early Miocene but possibly late ...
Simpson, George Gaylord, 1902-, Ameghino, Florentino, 1853-1911.   +1 more
core   +1 more source

Endocranial anatomy of Antarctic Eocene stem penguins: implications for sensory system evolution in Sphenisciformes (Aves) [PDF]

, 2015
Penguins have a more than 60 million year long evolutionary history. Thus, stem lineage fossil taxa are key to understanding their evolution. Here, we present data on three virtual endocasts from stem penguin skulls collected from the Eocene La Meseta ...
Tambussi, Claudia Patricia, Ksepka, Daniel T., Degrange, Federico Javier   +2 more
core   +1 more source

Fig. 22 in The Basal Penguin (Aves: Sphenisciformes) Perudyptes Devriesi And A Phylogenetic Evaluation Of The Penguin Fossil Record

, 2010
Fig. 22. Pterygoids of selected penguin taxa, illustrating phylogenetic characters: (A) the stem penguin Paraptenodytes antarcticus (AMNH 3338); (B) extant Spheniscus humboldti (AMNH 4921).
Ksepka, Daniel T., Clarke, Julia A.
core   +1 more source

A new Miocene penguin from Patagonia and its phylogenetic relationships [PDF]

, 2007
We describe a new medium−sized penguin, Madrynornis mirandus gen. et sp. nov., from the early late Miocene Puerto Madryn Formation, Chubut Province, Argentina. Although it is evident that extant and fossil penguins form a remarkably homogeneous family of
Donato, M., Cozzuol, M., Acosta, Hospitaleche C, Tambussi, C.   +3 more
core  

Early Miocene Patagonian penguin

, 2006
36 p. : ill. ; 26 cm.Includes bibliographical references (p. 27-28).Paraptenodytes antarcticus is one of the best-known and most complete fossil penguins.
Giannini, Norberto P., Ksepka, Daniel T., Bertelli, Sara, Ph. D.   +2 more
core   +1 more source

Phylogenetic analysis of pelecaniformes (aves) based on osteological data: implications for waterbird phylogeny and fossil calibration studies. [PDF]

PLoS One, 2010
Smith ND.
europepmc   +1 more source

Redescription and Phylogenetic Position of the Early Miocene Penguin Paraptenodytes Antarcticus from Patagonia

, 2006
Daniel T. Ksepka, Norberto P. Giannini, Sara Bertelli   +2 more
core   +1 more source

Revised nomenclature of avian quadrate morphology and a detailed survey of clade-specific anatomical features

Kuo P, Benson R, Field DJ.
europepmc   +1 more source