Results 31 to 40 of about 1,653,876 (262)
Evolution of body morphology and beak shape revealed by a morphometric analysis of 14 Paridae species. [PDF]
Front Zool, 2016 Morphological characters of birds reflect their adaptive evolution and ecological requirements and are also relevant to phylogenetic relationships within a group of related species. The tits (Paridae) are known to be outwardly homogeneous in shape, with one aberrant member, the Ground Tit (Pseudopodoces humilis), which is quite different from its ...
Shao S +5 more
europepmc +3 more sources
Morphological diversity and altitudinal differentiation of Aethopyga species
Ecology and Evolution, 2023 The morphological characteristics of birds are an important tool for studying their adaptation and evolution. The morphological evolution of a clade is not only constrained by the phylogenetic relationship, but also influenced by ecological factors and ...
Wenzhu Lu +4 more
doaj +1 more source
The shapes of bird beaks are highly controlled by nondietary factors [PDF]
Proceedings of the National Academy of Sciences, 2016 Significance We show that beak and skull shapes in birds of prey (“raptors”) are strongly coupled and largely controlled by size. This relationship means that, rather than being able to respond independently to natural selection, beak shapes are highly constrained to evolve in a particular way. The main aspects of shape variation seem
Bright, Jen A. +3 more
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Triassic coleoid beaks and other structures from the Calcareous Alps revisited [PDF]
Acta Palaeontologica Polonica, 2022 We performed comprehensive study of seven Carnian, Late Triassic specimens of a coleoid cephalopod Phragmoteuthis bisinuata, on which Suess based his hypothesis on “beaks of P. bisinuata”. Using SEM/EDS, we found that “beaks of P.
LARISA A. DOGUZHAEVA +4 more
doaj +1 more source
Ecology and Evolution, 2022 The term terroir is used in viticulture to emphasize how the biotic and abiotic characteristics of a local site influence grape physiology and thus the properties of wine.
Paola L. Carrión +13 more
doaj +1 more source
Mandibular Condyle Shape and Symmetry in 4- to 19-Year-Old Children and Early Adolescents
Indonesian Journal of Dental Medicine, 2023 Background: The prevalence of TMD (temporomandibular disorder) in children and early adolescents varies widely. TMD can cause permanent facial deformities and affect occlusion and speech, which will affect growth, development, and quality of life.
Barnabas Bonardo +2 more
doaj +1 more source
Journal of Basic and Applied Zoology, 2020 Background The present study is designed to identify the morphological description of the digestive tract in two species of different birds; these birds were Taeniopygia guttata (zebra finch) which is granivorous and Sturnus vulgaris (Starling) which is ...
Ameer M. Taha, Abdulaziz S. AL-Duleemy
doaj +1 more source
Molecular and morphological evidence reveals a hidden new taxon in the endemic genus Pseudocuneopsis (Bivalvia, Unionidae) from China [PDF]
ZooKeys, 2023 A new species of freshwater mussel belonging to the genus Pseudocuneopsis, namely Pseudocuneopsis wuana sp. nov., is diagnosed and described from Guangxi Province, China.
Lili Liu +5 more
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Scaling and shear transformations capture beak shape variation in Darwin’s finches [PDF]
Proceedings of the National Academy of Sciences, 2010 Evolution by natural selection has resulted in a remarkable diversity of organism morphologies that has long fascinated scientists and served to establish the first relations among species. Despite the essential role of morphology as a phenotype of species, there is not yet a formal, mathematical scheme to quantify morphological ...
Campàs, O. +4 more
openaire +4 more sources
New species of the genus Pseudocuneopsis Huang, Dai, Chen & Wu, 2022 (Bivalvia, Unionidae) from Guangxi Province, China [PDF]
ZooKeys, 2023 A new species of freshwater mussel belonging to the genus Pseudocuneopsis, namely Pseudocuneopsis yangshuoensis sp. nov., is diagnosed and described from Guangxi Province, China. This paper provides a detailed morphological description, photograph of the
Ruiwen Wu +6 more
doaj +3 more sources