Results 21 to 30 of about 526 (137)

Constructing a multiple‐part morphospace using a multiblock method

open access: yesMethods in Ecology and Evolution, 2023
Popular current methods for quantifying variation in biological shape are well‐suited to analyses of isolated parts (e.g. the same bone from the skeletons of many individuals).
Daniel B. Thomas   +5 more
doaj   +1 more source

THE CORACOIDS IN FUNCTIONAL AND MORPHOLOGICAL STUDIES OF PENGUINS (AVES, SPHENISCIDAE) OF THE EOCENE OF ANTARCTICA

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2010
The partial articulated skeleton MLP 77-V-10-1 comes from the upper levels of La Meseta Formation (Seymour Island, Antarctica) at the southwestern slope of the plateau.
CAROLINA ACOSTA HOSPITALECHE   +1 more
doaj   +1 more source

A fossil penguin bone from Kawhia, New Zealand [PDF]

open access: yesNew Zealand Journal of Geology and Geophysics, 1963
Abstract The two ends of a femur similar in size to that of Archaespheniscus lowei Marples, but possibly representing an unnamed small, pecies of Palaeeudyptes , from the Whaingaroan Stage of Motutara Point, Kawhia Harbour, are the ...
B. J. Marples, C. A. Fleming
openaire   +1 more source

Morphometric patterns in Recent and fossil penguins (Aves, Sphenisciformes) [PDF]

open access: yesJournal of Zoology, 1989
A total of 622 skin specimens, 527 skeletons, and myological data compiled by Schreiweis (1972) were used to investigate morphometric patterns within and among the 18 Recent species of Spheniscidae, and to compare the family with a fighted species, the common diving‐petrel (Pelecanoides urinator), considered by some authorities to be similar to the ...
openaire   +2 more sources

Eocene penguin fossils as archives of Antarctic weathering and climate change: insights from micro-X-ray fluorescence elemental mapping [PDF]

open access: yesFossil Record
One of the richest known fossil records of penguins occurs in the Eocene La Meseta and Submeseta formations on Seymour Island, Antarctic Peninsula.
Boyang Xia, Huaichun Wu, Quanguo Li
doaj   +3 more sources

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

open access: yesPLoS ONE, 2010
BackgroundDebate regarding the monophyly and relationships of the avian order Pelecaniformes represents a classic example of discord between morphological and molecular estimates of phylogeny.
Nathan D Smith
doaj   +1 more source

The Basal Penguin (Aves: Sphenisciformes) Perudyptes devriesi and a Phylogenetic Evaluation of the Penguin Fossil Record

open access: yesBulletin of the American Museum of Natural History, 2010
Abstract We present the first detailed description of Perudyptes devriesi, a basal penguin from the middle Eocene (~42 Ma) Paracas Formation of Peru, and a new analysis of all published extinct penguin species as well as controversial fragmentary specimens.
Ksepka, Daniel T., Clarke, Julia A.
openaire   +1 more source

The earliest fossil record of a medium-sized penguin

open access: yesPolish Polar Research, 2011
The earliest fossil record of a medium-sized penguinThe fossil record of Antarctic Sphenisciformes dates as early as the late Palaeocene Cross Valley Formation, Seymour Island, Antarctic Peninsula. However, the best known Antarctic locality for early penguin remains (mainly isolated bones) is the Eocene La Meseta Formation that outcrops in the ...
Piotr Jadwiszczak, Sandra Chapman
openaire   +1 more source

First bird remains from the Eocene of Algarrobo, central Chile Primeros restos de aves del Eoceno de Algarrobo, Chile central

open access: yesAndean Geology, 2012
Paleogene records of birds in the Eastern margin of the Pacific Ocean have increased in recent years, being almost exclusively restricted to fossil Sphenisciformes (penguins).
Roberto E Yury-Yáñez   +5 more
doaj   +1 more source

Have historical climate changes affected Gentoo penguin (Pygoscelis papua) populations in Antarctica?

open access: yesPLoS ONE, 2014
The West Antarctic Peninsula (WAP) has been suffering an increase in its atmospheric temperature during the last 50 years, mainly associated with global warming.
Fabiola Peña M   +5 more
doaj   +1 more source

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