Ecological diversification in sexual and asexual lineages DOI Creative Commons
P. Catalina Chaparro‐Pedraza, Grégory Roth, Carlos J. Melián

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Dec. 5, 2024

The presence or absence of sex can have a strong influence on the processes whereby species arise. Yet, mechanistic underpinnings this are poorly understood. To gain insights into mechanisms reproductive mode may ecological diversification, we investigate how natural selection, genetic mixing, and interact interaction affects evolutionary dynamics diversifying lineages. do so, analyze models diversification for sexual asexual lineages, in which is driven by intraspecific resource competition. We find that strongly influences rate and, thus, ensuing diversity lineage. Our results reveal ecologically-based selection stronger lineages because organisms higher potential than ones. This promotes faster However, small amount mixing accelerates trait expansion process overturning effect alone enabling niche occupancy As consequence, occupy more niches, eventually resulting diversity. suggests reproduction be widespread among it increases diversification.

Language: Английский

Evolution of Pineal Nonvisual Opsins in Lizards and the Tuatara and Identification of Lepidopsin: A New Opsin Gene DOI Creative Commons

Rafael Romero,

Flávio S. J. de Souza

Genome Biology and Evolution, Journal Year: 2025, Volume and Issue: 17(5)

Published: April 7, 2025

Many lizards (Squamata), as well the tuatara (Rhynchocephalia), are distinguished among vertebrate groups for presence of parietal eye, or "third eye", a structure derived from pineal complex containing simplified retina with photoreceptor cells. The eye expresses nonvisual opsins that differ visual opsin repertoire lateral eyes. These pinopsin (OPNP), parapinopsin (OPNPP), and parietopsin (OPNPT), all being evolutionary close to opsins. Here, we searched over 60 lepidosaurian genomes check trajectory these genes in reptiles. Unexpectedly, identified novel gene, which termed "lepidopsin" (OPNLEP), is present solely most lizard but absent other vertebrates. Remnants gene found coelacanth some ray-finned fishes, implying OPNLEP an ancient has been repeatedly lost during evolution. We Iguania, Anguimorpha, Scincoidea, Lacertidae clades, possess harbor genes. Lizards missing like geckos, teiids, fossorial amphisbaenian, lack In summary, our survey reveals (i) persistence previously unknown gene-OPNLEP-in lepidosaurians; (ii) losses specific clades; (iii) correlation between genomic

Language: Английский

Citations

1
The molecular basis of punctuated equilibria: the roles of developmental genes in stasis and speciation DOI
Manuel Casanova

Paleobiology, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 12

Published: May 15, 2025

Abstract Although the theory of punctuated equilibria has stood test time, critics have sometimes highlighted lack a complementary molecular mechanism. The developmental gene hypothesis (DGH) provides just such mechanism and is reviewed significantly expanded in present paper, taking advantage concepts active passive evolvability, genetic drift, nearly neutral evolution, compensatory adaptation face weakly deleterious variation. In addition, with use game theory, author models behavior regulatory (DevReg) genes, which are integral to proposed hypothesis, order better understand their roles stasis speciation.

Language: Английский

Citations

0
Levels of Evolution (II): Megaevolution and Modular-Evolution DOI
Carlos Ochoa

Evolutionary Biology/Evolutionary biology, Journal Year: 2025, Volume and Issue: unknown, P. 365 - 410

Published: Jan. 1, 2025

Language: Английский

Citations

0
A Late Devonian coelacanth reconfigures actinistian phylogeny, disparity, and evolutionary dynamics DOI Creative Commons
Alice M. Clement, Richard Cloutier, Michael S. Y. Lee

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Sept. 12, 2024

The living coelacanth Latimeria (Sarcopterygii: Actinistia) is an iconic, so-called 'living fossil' within one of the most apparently morphologically conservative vertebrate groups. We describe a new, 3-D preserved from Late Devonian Gogo Formation in Western Australia. assemble comprehensive analysis group to assess phylogeny, evolutionary rates, and morphological disparity all coelacanths. reveal major shift between post-Devonian newly described fossil fish fills critical transitional stage evolution. Since mid-Cretaceous, discrete character changes (representing innovations) have essentially ceased, while meristic continuous characters continued evolve Considering range putative environmental drivers, tectonic activity best explains variation rates

Language: Английский

Citations

3
Common misconceptions of speciation DOI Creative Commons
Jonah M. Walker,

Eva S. M. van der Heijden,

Arif Maulana

et al.

Evolutionary Journal of the Linnean Society, Journal Year: 2024, Volume and Issue: 3(1)

Published: Jan. 1, 2024

Speciation is a complex process that can unfold in many different ways. researchers sometimes simplify core principles their writing way implies misconceptions about the speciation process. While we think these are usually inadvertently implied (and not actively believed) by researchers, they nonetheless risk warping how external readers understand speciation. Here highlight six of especially widespread. First, species to be clearly and consistently defined entities nature, whereas reality boundaries often fuzzy semipermeable. Second, 'good', which two-fold problematic because it both evolution has goal universally increases chances lineage persistence. Third, species-poor clades with species-rich sister considered 'primitive' or 'basal', falsely implying ladder progress. Fourth, assumed strictly tree-like, but genomic findings show widespread hybridization more consistent network-like evolution. Fifth, lack association between trait elevated rates macroevolutionary studies interpreted as evidence against its relevance speciation-even if microevolutionary case relevant. Sixth, obvious differences too readily (i) barriers reproduction, (ii) stepping-stone inevitable speciation, (iii) reflective species' whole divergence history. In conclusion, call for caution, particularly when communicating science, miscommunication ideas provides fertile ground spread.

Language: Английский

Citations

3
A review of catfish (Siluriformes) hybridization DOI
Alexsandre Gutiérrez‐Barragán, Alejandro Varela‐Romero, Francisco J. García‐De León

et al.

Reviews in Fish Biology and Fisheries, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 5, 2025

Language: Английский

Citations

0
Toward a Phylogenetic Taxonomy of Sturgeons (Acipenseriformes: Acipenseridae) DOI
Chase Doran Brownstein, Thomas J. Near

Bulletin of the Peabody Museum of Natural History, Journal Year: 2025, Volume and Issue: 66(1)

Published: April 25, 2025

Language: Английский

Citations

0
DNA Damage, Genome Stability, and Adaptation: A Question of Chance or Necessity? DOI Open Access
John H. Herrick

Genes, Journal Year: 2024, Volume and Issue: 15(4), P. 520 - 520

Published: April 21, 2024

DNA damage causes the mutations that are principal source of genetic variation. detection and repair mechanisms therefore play a determining role in generating diversity on which natural selection acts. Speciation, it is commonly assumed, occurs at rate set by level standing allelic population. The process speciation driven combination two evolutionary forces: drift ecological selection. Genetic takes place under conditions relaxed selection, results balance between rates mutation substitution. These processes, necessarily mediated variety guaranteeing genome stability any given species. One outstanding questions biology concerns origin widely varying phylogenetic distribution biodiversity across Tree Life how forces contribute to shaping distribution. following examines some molecular underlying adaptive radiations associated with species richness evenness different eukaryotic lineages.

Language: Английский

Citations

1
Ecomorphology of Longnose Gar (Lepisosteus osseus): on the influence of size, sex, and river location DOI Creative Commons
Jason C. Doll, Ian Fisher,

Aaron Selby

et al.

Environmental Biology of Fishes, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 13, 2024

Abstract Ecomorphology is essential to understanding the evolution and biogeography of species. However, morphological studies that focus on nongame or ‘rough’ fish groups such as Gar (Lepisosteidae), outside a phylogenetic context, are comparatively rare. Herein, we investigate effects sex, size, location in river assess potential for sexual dimorphism, allometry, habitat, some combination drive observed morphologic variation. Our dataset includes 230 Longnose Gars ( Lepisosteus osseus ) made up both males females wide range sizes collected from three different sites corresponding upper, middle, lower Great Pee Dee River South Carolina. Dorsal lateral photographs were taken each specimen landmarked 2D geometric morphometric analyses. Discriminant function analyses (DFA) also conducted few linear trusses compare accuracy sex-related shape aspects emerged morphometrics possible field-based tool help fisheries managers understand their stock populations. Overall, was statistically significant predictor shape, yet differences not biologically meaningful. Additionally, sex size strong predictors with greatest seen largest individuals. DFA field measurements found Snout Length-to-Total Length ratio accurately predicted 71% time, having longer snouts than males. Differences between sexes can allow tentative assignments without lethal gonadal inspection. This study presents first standardized whole-body protocol Gar.

Language: Английский

Citations

1
First occurrence of an acipenseriform (Chondrostei: Acipenseriformes) from the Upper Jurassic Kimmeridge Clay Formation of England DOI
Samuel Lewis Cooper

Journal of Vertebrate Paleontology, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 18, 2024

Several fragmentary remains of an enigmatic acipenseriform, the order fishes that includes living sturgeons and paddlefishes, are described from Upper Jurassic Kimmeridge Clay Formation southern England. These significant because they represent first definitive evidence acipenseriform outside Asia. In total, five associated dorsal caudal fulcra fin a paired pelvic at least two separate individuals identified as although it is uncertain to which family belong. Three families Mesozoic considered: †Chondrostei (Lower Jurassic, Europe), †Peipiaosteidae (Upper Lower Cretaceous, Asia), extant Acipenseroidei Cretaceous–recent, Laurasia). The new Kimmeridgian fossils would significantly extend temporal spatial distribution whichever ascribed, but their affinities remain unclear. Regardless, stratigraphic paleobiogeographic occurrence specimens holds novel implications for poorly known evolutionary history this primitive clade non-Neopterygian fishes.

Language: Английский

Citations

1