scholarly journals Is reproductive strategy a key factor in understanding the evolutionary history of Southern Ocean Asteroidea (Echinodermata)?

2019 ◽  
Vol 9 (15) ◽  
pp. 8465-8478 ◽  
Author(s):  
Camille Moreau ◽  
Bruno Danis ◽  
Quentin Jossart ◽  
Marc Eléaume ◽  
Chester Sands ◽  
...  
Keyword(s):  
Southern Ocean ◽  
Reproductive Strategy ◽  
Evolutionary History ◽  
Key Factor ◽  
History Of

scholarly journals Erratum to: Evolutionary history of Southern Ocean Odontaster sea star species (Odontasteridae; Asteroidea)

Polar Biology ◽  
2011 ◽  
Vol 35 (1) ◽  
pp. 159-159
Author(s):  
Alexis M. Janosik ◽  
Andrew R. Mahon ◽  
Kenneth M. Halanych
Keyword(s):  
Southern Ocean ◽  
Evolutionary History ◽  
Sea Star ◽  
History Of

scholarly journals Subdivision of ancestral scale genetic program underlies origin of feathers and avian scutate scales

2018 ◽  
Author(s):  
Jacob M. Musser ◽  
Günter P. Wagner ◽  
Cong Liang ◽  
Frank A. Stabile ◽  
Alison Cloutier ◽  
...  
Keyword(s):  
Gene Expression ◽  
Evolutionary History ◽  
Theropod Dinosaurs ◽  
Skin Appendages ◽  
Key Factor ◽  
History Of ◽  
Tetrapod Evolution ◽  
Similar Gene ◽  
Complex Evolutionary History

AbstractBirds and other reptiles possess a diversity of feather and scale-like skin appendages. Feathers are commonly assumed to have originated from ancestral scales in theropod dinosaurs. However, most birds also have scaled feet, indicating birds evolved the capacity to grow both ancestral and derived morphologies. This suggests a more complex evolutionary history than a simple linear transition between feathers and scales. We set out to investigate the evolution of feathers via the comparison of transcriptomes assembled from diverse skin appendages in chicken, emu, and alligator. Our data reveal that feathers and the overlapping ‘scutate’ scales of birds share more similar gene expression to each other, and to two types of alligator scales, than they do to the tuberculate ‘reticulate’ scales on bird footpads. Accordingly, we propose a history of skin appendage diversification, in which feathers and bird scutate scales arose from ancestral archosaur body scales, whereas reticulate scales arose earlier in tetrapod evolution. We also show that many “feather-specific genes” are also expressed in alligator scales. In-situ hybridization results in feather buds suggest that these genes represent ancestral scale genes that acquired novel roles in feather morphogenesis and were repressed in bird scales. Our findings suggest that the differential reuse, in feathers, and suppression, in bird scales, of genes ancestrally expressed in archosaur scales has been a key factor in the origin of feathers – and may represent an important mechanism for the origin of evolutionary novelties.

Evolutionary history of Southern Ocean Odontaster sea star species (Odontasteridae; Asteroidea)

Polar Biology ◽  
2010 ◽  
Vol 34 (4) ◽  
pp. 575-586 ◽  
Author(s):  
Alexis M. Janosik ◽  
Andrew R. Mahon ◽  
Kenneth M. Halanych
Keyword(s):  
Southern Ocean ◽  
Evolutionary History ◽  
Sea Star ◽  
History Of

Elaborating the role of reflection and individual differences in the study of folk-economic beliefs

2018 ◽  
Vol 41 ◽  
Author(s):  
Kevin Arceneaux
Keyword(s):  
Decision Making ◽  
Individual Differences ◽  
Cognitive Processes ◽  
Evolutionary History ◽  
Behavioral Responses ◽  
History Of ◽  
Economic Beliefs

AbstractIntuitions guide decision-making, and looking to the evolutionary history of humans illuminates why some behavioral responses are more intuitive than others. Yet a place remains for cognitive processes to second-guess intuitive responses – that is, to be reflective – and individual differences abound in automatic, intuitive processing as well.

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