Results 111 to 120 of about 125,407 (302)

Human preferences for sexually dimorphic faces may be evolutionarily novel [PDF]

, 2014
This article has been made available through the Brunel Open Access Publishing Fund.A large literature proposes that preferences for exaggerated sex typicality in human faces (masculinity/femininity) reflect a long evolutionary history of sexual and ...
Boyette, AH, Clark, AP, Cuthill, IC, Fried, RL, Gibson, MA, Hewlett, BS, Honey, PL, Huang, Z, Jamieson, M, Jankowiak, W, Josephson, SC, Liebert, MA, Penton-Voak, IS, Purzycki, BG, Scott, IM, Shaver, JH, Snodgrass, JJ, Sosis, R, Sugiyama, LS, Swami, V, Yu, DW, Zhao, Y   +21 more
core  

Age and size at maturity: sex, environmental variability and developmental thresholds [PDF]

, 2004
In most organisms, transitions between different life-history stages occur later and at smaller sizes as growth conditions deteriorate. Day and Rowe recently proposed that this pattern could be explained by the existence of developmental thresholds ...
Andrew P. Beckerman, Craig T. Lapsley, Day T., Stewart J. Plaistow, Tim G. Benton, Wesselingh R. A.   +5 more
core   +2 more sources

New craniodental materials of Falcarius utahensis (Theropoda: Therizinosauria) reveal patterns of intraspecific variation and cranial evolution in early coelurosaurians

The Anatomical Record, EarlyView.
Abstract Despite documented ecomorphological shifts toward an herbivorous diet in several coelurosaurian lineages, the evolutionary tempo and mode of these changes remain poorly understood, hampered by sparse cranial materials for early representatives of major clades. This is particularly true for Therizinosauria, with representative crania best known
William J. Freimuth, Lindsay E. Zanno
wiley   +1 more source

First Evidence of Secondary Sexual Dimorphism in the Freshwater Fish Family Botiidae: A Newly Recognised Synapomorphy of Loaches (Cypriniformes: Cobitoidea)

Fishes
Within the freshwater fish order Cypriniformes, loaches form a monophyletic lineage comprising nine families with more than 1400 species. Secondary sexual dimorphism is widespread among loach families, most notably in the form of enlarged pectoral fins ...
Jörg Bohlen, Tomáš Dvořák, Vendula Šlechtová   +2 more
doaj   +1 more source

Temporal variation in Plio- Pleistocene Antidorcas (Mammalia: Bovidae) horncores: the case from Bolt's Farm and why size matters [PDF]

, 2007
Morphological differences in samples of fossil (Antidorcas recki) and modern (A. marsupialis) springbok horncores suggest that the ancestral species shows less sexual dimorphism than is observed in the horn dimensions of modern springbok.
Reynolds, Sally C.
core  

A morphological and molecular description of a new Teleopsis species (Diptera: Diopsidae) from Thailand [PDF]

, 2007
A new species of Teleopsis (Diptera, Diopsidae) from Chiang Mai, Thailand is described and illustrated. Teleopsis thaii Földvári & Carr is shown to be a member of a species group, termed the dalmanni species group, along with three previously described ...
Carr, Martin, Cotton, Samuel, Földvári, Mihály, Pomiankowski, Andrew   +3 more
core   +1 more source

Morphological variation in atlas and axis of Neotropical spiny rats (Rodentia, Echimyidae)

The Anatomical Record, EarlyView.
Abstract The unique morphologies of the first two cervical vertebrae, the atlas and axis, represent a significant innovation in mammalian evolution. These structures support the weight of the head and enable intricate movements of the head and neck.
Thomas Furtado da Silva Netto, João Felipe Leal Kaiuca, Adriana Itatí Olivares, William Corrêa Tavares   +3 more
wiley   +1 more source

The Involvement of Melatonin in the Dimorphism of Glucose and Lipid Metabolism of Tilapia

Biomolecules
In tilapia, males grow faster than females, but the metabolites/pathways behind this sexual dimorphism remain unclear. In this study, we first examined growth, feeding, serum biochemical parameters, and mRNA expression in tilapia under mono-sex and mixed-
Jingkai Qin, Chenguang Liu, Zongzhen Liao, Yang Yu, Caiyun Sun, Wensheng Li   +5 more
doaj   +1 more source

Neuroanatomical diversity in Teleocichla with new volumetric and histological insights into the encephalon of Teleocichla monogramma Kullander 1988

The Anatomical Record, EarlyView.
Abstract Teleocichla comprises small cichlids that inhabit the rapid streams of Amazonian rivers; however, there has been limited research on their encephalon morphology. This study examined the neuroanatomy of four species, focusing on volumetric measurements of their encephalon subregions, and providing a histological description of the encephalon of
Renan Leão‐Reis, Keila Xavier Magalhães, Thiago Nilton A. Pereira, Janice Muriel‐Cunha, Alberto Akama   +4 more
wiley   +1 more source

Evolution of craniofacial shape in relation to sexual dimorphism in Theropithecus and Papio

Frontiers in Ecology and Evolution
IntroductionSexual dimorphism in cranial morphology is a significant aspect of primate evolution, providing insights into evolutionary pressures and mating systems in different species.
Ángeles Ossorio, Ambra Figueroa-Torrejón, Rodrigo Buston, Matteo Caldon, Jacinto Mathe, Jacinto Mathe, Giuliano Doria, Spartaco Gippoliti, Spartaco Gippoliti, Antonella Volta, María Joana Ferreira da Silva, María Joana Ferreira da Silva, María Joana Ferreira da Silva, René Bobe, René Bobe, René Bobe, Susana Carvalho, Susana Carvalho, Susana Carvalho, Susana Carvalho, Cristian Capelli, Felipe I. Martínez   +21 more
doaj   +1 more source