Evolution

Just out | Evolution of developmental sequences in lepidosaurs @ Peer J

Just out @ PeerJ Evolution of developmental sequences in lepidosaurs Author(s) Tomasz Skawiński, Bartosz Borczyk Abstract: Background Lepidosaurs, a group including rhynchocephalians and squamates, are one of the major clades of extant vertebrates. Although there has been extensive phylogenetic work on this clade, its interrelationships are a matter of debate. Morphological and molecular data suggest very different relationships within squamates. Despite this, relatively few studies have assessed the utility of

Just out | Biases in the study of relationships between biodiversity dynamics and fluctuation of environmental conditions @ Palaeontologia Electronica

Just out @ Palaeontologia Electronica Biases in the study of relationships between biodiversity dynamics and fluctuation of environmental conditions Author(s) Stéphane Jouve, Bastien Mennecart, Julien Douteau, and Nour-Eddine Jalil Abstract: During the last decades, studies testing the correlations between the dynamics of diversity with various environmental variables strongly increased, but numerous biases affecting these analyses have been recognised. Recent studies considering the evolution of marine crocodylomorphs in comparison with the

Just out | Accelerated body size evolution during cold climatic periods in the Cenozoic @ PNAS

Just out @ PNAS Accelerated body size evolution during cold climatic periods in the Cenozoic Author(s) Julien Clavel and Hélène Morlon Abstract: How ecological and morphological diversity accumulates over geological time is much debated. Adaptive radiation theory has been successful in testing the effects of biotic interactions on the rapid divergence of phenotypes within a clade, but this theory ignores abiotic effects. The role of abiotic drivers on the tempo of phenotypic

Just out | Giant virus discovery sparks debate over tree of life @ Nature

Just out @ Nature Giant virus discovery sparks debate over tree of life Author(s): Sara Reardon Excerpt: “Evolutionary biologists have never known what to make of viruses, arguing over their origins for decades. But a newly discovered group of giant viruses, called Klosneuviruses, could be a ‘missing link’ that helps to settle the debate — or provoke even more discord. In 2003, researchers reported that they had found giant viruses,

Just out | Homeotic shift at the dawn of the turtle evolution @ Royal Society Open Science

Just out @ Royal Society Open Science Homeotic shift at the dawn of the turtle evolution Author(s) Tomasz Szczygielski Abstract: All derived turtles are characterized by one of the strongest reductions of the dorsal elements among Amniota, and have only 10 dorsal and eight cervical vertebrae. I demonstrate that the Late Triassic turtles, which represent successive stages of the shell evolution, indicate that the shift of the boundary between the

Just out | Evolution of larval size in cyclostome bryozoans @ Historical Biology

Just out @ Historical Biology Evolution of larval size in cyclostome bryozoans Author(s) Paul D. Taylor & Helen L. Jenkins Abstract: Cyclostomes are the only order of stenolaemate bryozoans living today. The non-feeding larvae of modern cyclostomes metamorphose on settlement to produce a calcified dome-shaped protoecium. Protoecial diameter provides a proxy for larval size. The sparse data available on living cyclostomes suggests that protoecial diameter is about one-and-a-half times greater

Just out | Gregorymys veloxikua, The Oldest Pocket Gopher (Rodentia: Geomyidae), and The Early Diversification of Geomyoidea @ Journal of Mammalian Evolution

Just out @ Journal of Mammalian Evolution Gregorymys veloxikua, The Oldest Pocket Gopher (Rodentia: Geomyidae), and The Early Diversification of Geomyoidea Author(s) Eduardo Jiménez-Hidalgo, Rosalía Guerrero-Arenas, Krister T. Smith Abstract: The rodent family Geomyidae is native to America. It comprises six extant genera with 40 species distributed from Saskatchewan, Canada to northern Colombia. Two subfamilies are included in the family, the extinct Entoptychinae, with a fossil record ranging from the late

Just out | Digest: Old world climates give rise to ‘young’ lizard skulls @ Evolution

Just out @ Evolution Title:  Digest: Old world climates give rise to ‘young’ lizard skulls Author(s) Amanda K. Powers Abstract: Shared environmental pressures often give rise to the convergence of morphological characters in unrelated and geographically distinct species. Darwin (1859) wrote that “analogous variation” of traits in different organisms could be explained by similar influences or challenges in their environment. Convergence of traits can be driven by adaptive radiation when

On the News | Galápagos giant tortoises show that in evolution, slow and steady gets you places @ The Guardian

On the News @ The Guardian Title: Galápagos giant tortoises show that in evolution, slow and steady gets you places Excerpt ““As I was walking along I met two large tortoises, each of which must have weighed at least two hundred pounds: one was eating a piece of cactus, and as I approached, it stared at me and slowly stalked away; the other gave a deep hiss, and drew in its head.

Just out | Molecular clocks indicate turnover and diversification of modern coleoid cephalopods during the Mesozoic Marine Revolution @ PRS B

Just out @ Proceedings of the Royal Society B Title:  Molecular clocks indicate turnover and diversification of modern coleoid cephalopods during the Mesozoic Marine Revolution Author(s): Alastair R. Tanner, Dirk Fuchs, Inger E. Winkelmann, M. Thomas P. Gilbert, M. Sabrina Pankey, Ângela M. Ribeiro, Kevin M. Kocot, Kenneth M. Halanych, Todd H. Oakley, Rute R. da Fonseca, Davide Pisani, Jakob Vinther Abstract: Coleoid cephalopod molluscs comprise squid, cuttlefish and octopuses, and