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Genetic Mapping of Orofacial Traits Reveals a Single Genomic Region Associated With Differences in Multiple Parameters of Jaw Size Between Astyanax mexicanus Surface and Cavefish.
IF 2.6 3区 生物学
Evolution & Development Pub Date : 2025-02-20 DOI: 10.1111/ede.70003
Amanda K Powers, Alleigh Amaismeier, Kathryn Thiel, William Anyonge, Suzanne E McGaugh, Tyler E Boggs, Clifford J Tabin, Joshua B Gross
{"title":"Genetic Mapping of Orofacial Traits Reveals a Single Genomic Region Associated With Differences in Multiple Parameters of Jaw Size Between Astyanax mexicanus Surface and Cavefish.","authors":"Amanda K Powers, Alleigh Amaismeier, Kathryn Thiel, William Anyonge, Suzanne E McGaugh, Tyler E Boggs, Clifford J Tabin, Joshua B Gross","doi":"10.1111/ede.70003","DOIUrl":"https://doi.org/10.1111/ede.70003","url":null,"abstract":"<p><p>The regulation of bone size is a poorly understood and complex developmental process. Evolutionary models can enable insight through interrogation of the developmental and molecular underpinnings of natural variation in bone size and shape. Here, we examine the Mexican tetra (Astyanax mexicanus), a species of teleost fish comprising of an extant river-dwelling surface fish and obligate cave-dwelling fish. These divergent morphs have evolved for thousands of years in drastically different habitats, which have led to diverse phenotypic differences. Among many craniofacial aberrations, cavefish harbor a wider gape, an underbite, and larger jaws compared to surface-dwelling morphs. Morphotypes are inter-fertile, allowing quantitative genetic analyses in F<sub>2</sub> pedigrees derived from surface × cavefish crosses. Here, we used quantitative trait locus (QTL) analysis to determine the genetic basis of jaw size. Strikingly, we discovered a single genomic region associated with several jaw size metrics. Future work identifying genetic lesions that explain differences in jaw development will provide new insight to the mechanisms driving bone size differences across vertebrate taxa.</p>","PeriodicalId":12083,"journal":{"name":"Evolution & Development","volume":" ","pages":"e70003"},"PeriodicalIF":2.6,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143457413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Developmental Plasticity and the Evolutionary Rescue of a Colonizing Mite
IF 2.6 3区 生物学
Evolution & Development Pub Date : 2025-02-18 DOI: 10.1111/ede.70002
Kathryn A. Stewart, Isabel M. Smallegange
{"title":"Developmental Plasticity and the Evolutionary Rescue of a Colonizing Mite","authors":"Kathryn A. Stewart,&nbsp;Isabel M. Smallegange","doi":"10.1111/ede.70002","DOIUrl":"https://doi.org/10.1111/ede.70002","url":null,"abstract":"<p>Plasticity, especially in small newly founded populations, can expose genetic variation to selection during the evolutionary rescue of populations, allowing individuals to achieve a phenotype with which they can survive. However, developmental plasticity can also enable organisms to accommodate perturbations, generating new phenotypic variation. We explored whether, at the start of a colonization event, phenotype dynamics follow a “selective” process in which plasticity fuels evolutionary rescue or whether they are due to developmental plasticity in a “generative” process. We investigated this using the bulb mite <i>Rhizoglyphus robini</i>, which expresses a facultative, juvenile dispersal phenotype (deutonymph) under unfavorable conditions and shows alternative adult male phenotypes: competitive fighters or benign scramblers that are expressed to mitigate food stress and which have higher levels of genetic heterozygosity than fighters. Mimicking colonization dynamics, we founded small, medium and large populations from deutonymphs on low or high food to test if scramblers were expressed earliest postcolonization within (i) the <i>smallest</i> founder populations to alleviate inbreeding (selective hypothesis), or (ii) the <i>largest</i> founder populations as a direct consequence of food stress is highest due to higher food competition (generative hypothesis). In line with the generative hypothesis under both food environments, scramblers were expressed at the earliest in the largest founder populations, which also tended to show the lowest growth at the start of the experiment and had the lowest ultimate population size. Our findings highlight the necessity to seek explanations of how developmental pathways likely influence evolutionary rescue patterns, starting with how resource limitation (stress) shapes adaptive responses during colonization.</p>","PeriodicalId":12083,"journal":{"name":"Evolution & Development","volume":"27 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ede.70002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exceptionally Preserved Setae: A Possible Morphological Synapomorphy of Cambrian Lophotrochozoans
IF 2.6 3区 生物学
Evolution & Development Pub Date : 2025-02-02 DOI: 10.1111/ede.70001
Yue Liang, Timothy P. Topper, Lars E. Holmer, Yazhou Hu, Fan Liu, Zhifei Zhang
{"title":"Exceptionally Preserved Setae: A Possible Morphological Synapomorphy of Cambrian Lophotrochozoans","authors":"Yue Liang,&nbsp;Timothy P. Topper,&nbsp;Lars E. Holmer,&nbsp;Yazhou Hu,&nbsp;Fan Liu,&nbsp;Zhifei Zhang","doi":"10.1111/ede.70001","DOIUrl":"10.1111/ede.70001","url":null,"abstract":"<p>Cambrian Lagerstätten yield exceptionally preserved fossils that have greatly improved our understanding of the origin and evolution of animal groups. Brachiopoda, a phylum of bivalved marine invertebrates nested firmly within the lophotrochozoan protostomes, are widely recovered in such Lagerstätten. The marginal chitinous setae (or chaetae) of brachiopods are the most commonly described soft tissue and have been interpreted as performing a defensive and/or sensory role. Despite their relatively common appearance in Cambrian Lagerstätten, the origin, function, and evolution of setae in the Brachiopoda is poorly known. Here, we document exquisitely preserved setal structures from South China and Laurentia paleocontinents giving new insights into their formation, microstructure and preservation mode. New setae typically make their appearance within the follicle of a neighbouring older seta and then branches off laterally forming its own follicle. Setal microstructure is likely to be composed of many canals, highly comparable to setae of their recent counterparts. Moreover, setae recovered from these palaeo-continents present different preservation: aside from the normal preservation of iron oxides and carbonaceous ingredients, some compositions of calcium are also detected in this originally chitinous organization. Investigating the evolutionary origins of chitinous setae, a specialized type found notably in lophotrochozoans such as brachiopods and annelids, reveals its presence in early Cambrian stem groups. This character likely serves as a morphological synapomorphy in lophotrochozoan evolution. However, the dearth of morpho-ultrastructure and comparative studies in Cambrian fossils presents a challenge in fully understanding this evolutionary development.</p>","PeriodicalId":12083,"journal":{"name":"Evolution & Development","volume":"27 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ede.70001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143079086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Complex and Dynamic Gene-by-Age and Gene-by-Environment Interactions Underlie Functional Morphological Variation in Adaptive Divergence in Arctic Charr (Salvelinus alpinus) 复杂和动态的基因随年龄和基因随环境的相互作用是北极鲑(Salvelinus alpinus)适应分化的功能形态变异的基础。
IF 2.6 3区 生物学
Evolution & Development Pub Date : 2024-12-26 DOI: 10.1111/ede.70000
Christine L. Ouellet-Fagg, Anne A. Easton, Kevin J. Parsons, Roy G. Danzmann, Moira M. Ferguson
{"title":"Complex and Dynamic Gene-by-Age and Gene-by-Environment Interactions Underlie Functional Morphological Variation in Adaptive Divergence in Arctic Charr (Salvelinus alpinus)","authors":"Christine L. Ouellet-Fagg,&nbsp;Anne A. Easton,&nbsp;Kevin J. Parsons,&nbsp;Roy G. Danzmann,&nbsp;Moira M. Ferguson","doi":"10.1111/ede.70000","DOIUrl":"10.1111/ede.70000","url":null,"abstract":"<p>The evolution of adaptive phenotypic divergence requires heritable genetic variation. However, it is underappreciated that trait heritability is molded by developmental processes interacting with the environment. We hypothesized that the genetic architecture of divergent functional traits was dependent on age and foraging environment. Thus, we induced plasticity in full-sib families of Arctic charr (<i>Salvelinus alpinus</i>) morphs from two Icelandic lakes by mimicking prey variation in the wild. We characterized variation in body shape and size at two ages and investigated their genetic architecture with quantitative trait locus (QTL) analysis. Age had a greater effect on body shape than diet in most families, suggesting that development strongly influences phenotypic variation available for selection. Consistent with our hypothesis, multiple QTL were detected for all traits and their location depended on age and diet. Many of the genome-wide QTL were located within a subset of duplicated chromosomal regions suggesting that ancestral whole genome duplication events have played a role in the genetic control of functional morphological variation in the species. Moreover, the detection of two body shape QTL after controlling for the effects of age provides additional evidence for genetic variation in the plastic response of morphological traits to environmental variation. Thus, functional morphological traits involved in phenotypic divergence are molded by complex genetic interactions with development and environment.</p>","PeriodicalId":12083,"journal":{"name":"Evolution & Development","volume":"27 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11670044/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142893367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Embryonic Lethality, Juvenile Growth Variation, and Adult Sterility Correlate With Phylogenetic Distance of Danionin Hybrids 丹尼宁杂种的胚胎致死性、幼体生长变异和成体不育性与系统发育距离相关。
IF 2.6 3区 生物学
Evolution & Development Pub Date : 2024-12-05 DOI: 10.1111/ede.12495
Ryan L. Trevena, Benton M. Veire, Trevor J. Chamberlain, Cara E. Moravec, Francisco Pelegri
{"title":"Embryonic Lethality, Juvenile Growth Variation, and Adult Sterility Correlate With Phylogenetic Distance of Danionin Hybrids","authors":"Ryan L. Trevena,&nbsp;Benton M. Veire,&nbsp;Trevor J. Chamberlain,&nbsp;Cara E. Moravec,&nbsp;Francisco Pelegri","doi":"10.1111/ede.12495","DOIUrl":"10.1111/ede.12495","url":null,"abstract":"<p>Hybrid incompatibility, which plays a pivotal role in speciation, is expected to correlate with greater phylogenetic distance. Here, we investigate the fitness of interspecies hybrids within the Danionin subfamily, which includes the model species, <i>Danio rerio</i>, and its relatives - <i>Danio kyathit</i>, <i>Danio albolineatus</i>, <i>Danio margaritatus</i>, and <i>Devario aequipinnatus</i>. We generated hybrids through in vitro fertilization, using <i>Danio rerio</i> as the maternal species, with normal fertilization rates showing no incompatibilities in sperm-egg interactions within these two genera. Generally, all hybrids exhibit normal patterns and timelines in early developmental transitions, from cleavage stages to the initiation of epiboly, although inter-genera <i>Danio</i>-<i>Devario</i> hybrids subsequently exhibit fully penetrant embryonic lethality. Intra-genus <i>Danio</i> hybrids, on the other hand, can survive through embryogenesis and into adulthood. However, rates of survival during these stages diminish according to phylogenetic distance, with increasing early lethality in hybrids from more distantly related species. Additionally, <i>Danio</i> hybrids exhibit increased growth rate variability during juvenile stages. All <i>Danio</i> hybrids have reduced testes sizes, sperm counts, and sperm viabilities, with sperm displaying defects in flagellum formation and integrity. Adult male intra-genus hybrids are invariably sterile, except in the case of <i>Danio rerio</i> hybrids with the closely related <i>Danio kyathit</i>, which produced a backcrossed F2 generation that did not survive juvenile stages. Our studies highlight a loss of hybrid compatibility at various life stages in the <i>Danio</i> and <i>Devario</i> genera, based on deleterious effects and reduced developmental robustness, emphasizing a correlation between the severity of incompatibility outcomes and the degree of phylogenetic relatedness.</p>","PeriodicalId":12083,"journal":{"name":"Evolution & Development","volume":"27 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11621593/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142784818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Heterochrony and Oophagy Underlie the Evolution of Giant Filter-Feeding Lamniform Sharks 异时性和噬卵性是巨型滤食性板状鲨鱼进化的基础
IF 2.6 3区 生物学
Evolution & Development Pub Date : 2024-11-30 DOI: 10.1111/ede.12496
Joel H. Gayford, Duncan J. Irschick, Andrew Chin, Jodie L. Rummer
{"title":"Heterochrony and Oophagy Underlie the Evolution of Giant Filter-Feeding Lamniform Sharks","authors":"Joel H. Gayford,&nbsp;Duncan J. Irschick,&nbsp;Andrew Chin,&nbsp;Jodie L. Rummer","doi":"10.1111/ede.12496","DOIUrl":"https://doi.org/10.1111/ede.12496","url":null,"abstract":"<p>Evolutionary transitions toward gigantic body sizes have profound consequences for the structure and dynamics of ecological networks. Among elasmobranchs (sharks and rays), gigantism has evolved on several occasions, most notably in the iconic Megalodon (<i>Otodus megalodon</i>†) and the extant whale shark (<i>Rhincodon typus</i>), basking shark (<i>Cetorhinus maximus</i>), and megamouth shark (<i>Megachasma pelagios</i>), all of which reach total lengths exceeding 6 m and, in some cases, reach 21 m or more. Comparative phylogenetic studies suggest that filter feeding and heterothermy provide two alternative evolutionary pathways leading to gigantism in sharks. These selection-based explanations for gigantism are important; however, our understanding of evolutionary transitions in body size is fundamentally constrained without a proximate, mechanistic understanding of how the suite of adaptations necessary to facilitate gigantism evolved. Here we propose the heterochrony hypothesis for the evolution of the giant filter-feeding shark ecomorphotype. We suggest that craniofacial adaptations for oophagy in embryonic stages of lamniform sharks are retained through ontogeny in <i>C. maximus</i> and <i>M. pelagios</i> by paedomorphosis, resulting in an enlarged head and mouth relative to the rest of the body, even in adulthood. This change in developmental timing enables these taxa to optimize prey acquisition, which is thought to be the limiting factor for the evolution of gigantism in filter-feeding marine vertebrates. We discuss the concordance of this hypothesis with current developmental, morphological, and evolutionary data, and we suggest future means by which the hypothesis could be tested.</p>","PeriodicalId":12083,"journal":{"name":"Evolution & Development","volume":"27 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ede.12496","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142754097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Coding-Sequence Evolution Does Not Explain Divergence in Petal Anthocyanin Pigmentation Between Mimulus luteus Var luteus and M. l. variegatus 编码-序列进化无法解释变叶含羞草和变叶含羞草花瓣花青素色素的差异。
IF 2.6 3区 生物学
Evolution & Development Pub Date : 2024-11-26 DOI: 10.1111/ede.12493
Walker E. Orr, Ji Yang Kim, Iker J. Sánchez Márquez, Caine J. Ryan, Tejas Raj, Ellen K. Hom, Ashley E. Person, Anne Vonada, John A. Stratton, Arielle M. Cooley
{"title":"Coding-Sequence Evolution Does Not Explain Divergence in Petal Anthocyanin Pigmentation Between Mimulus luteus Var luteus and M. l. variegatus","authors":"Walker E. Orr,&nbsp;Ji Yang Kim,&nbsp;Iker J. Sánchez Márquez,&nbsp;Caine J. Ryan,&nbsp;Tejas Raj,&nbsp;Ellen K. Hom,&nbsp;Ashley E. Person,&nbsp;Anne Vonada,&nbsp;John A. Stratton,&nbsp;Arielle M. Cooley","doi":"10.1111/ede.12493","DOIUrl":"10.1111/ede.12493","url":null,"abstract":"<p>Biologists have long been interested in understanding genetic constraints on the evolution of development. For example, noncoding changes in a gene might be favored over coding changes if they are less constrained by pleiotropic effects. Here, we evaluate the importance of coding-sequence changes to the recent evolution of a novel anthocyanin pigmentation trait in the monkeyflower genus <i>Mimulus</i>. The magenta-flowered <i>Mimulus luteus</i> var. <i>variegatus</i> recently gained petal lobe anthocyanin pigmentation via a single-locus Mendelian difference from its sister taxon, the yellow-flowered <i>M. l. luteus</i>. Previous work showed that the differentially expressed transcription factor gene <i>MYB5a/NEGAN</i> is the single causal gene. However, it was not clear whether <i>MYB5a</i> coding-sequence evolution (in addition to the observed patterns of differential expression) might also have contributed to increased anthocyanin production in <i>M. l. variegatus</i>. Quantitative image analysis of tobacco leaves, transfected with <i>MYB5a</i> coding sequence from each taxon, revealed robust anthocyanin production driven by both alleles. Counter to expectations, significantly higher anthocyanin production was driven by the allele from the low-anthocyanin <i>M. l. luteus</i>, a result that was confirmed through both a replication of the initial study and analysis by an alternative method of spectrophotometry on extracted leaf anthocyanins. Together with previously published expression studies, our findings support the hypothesis that petal pigment in <i>M. l. variegatus</i> was not gained by protein-coding changes, but instead solely via noncoding cis-regulatory evolution. Finally, while constructing the transgenes needed for this experiment, we unexpectedly discovered two sites in <i>MYB5a</i> that appear to be post-transcriptionally edited—a phenomenon that has been rarely reported, and even less often explored, for nuclear-encoded plant mRNAs.</p>","PeriodicalId":12083,"journal":{"name":"Evolution & Development","volume":"27 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ede.12493","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142727319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
From two segments and beyond: Investigating the onset of regeneration in Syllis malaquini 从两节到更长:调查马拉喹鲤的再生起始阶段。
IF 2.6 3区 生物学
Evolution & Development Pub Date : 2024-10-15 DOI: 10.1111/ede.12492
Vanessa Spieß, Rannyele P. Ribeiro, Conrad Helm, M. Teresa Aguado
{"title":"From two segments and beyond: Investigating the onset of regeneration in Syllis malaquini","authors":"Vanessa Spieß,&nbsp;Rannyele P. Ribeiro,&nbsp;Conrad Helm,&nbsp;M. Teresa Aguado","doi":"10.1111/ede.12492","DOIUrl":"10.1111/ede.12492","url":null,"abstract":"<p>Annelids feature a diverse range of regenerative abilities, but complete whole-body regeneration is less common, particularly in the context of the head and anterior body regeneration. This study provides a detailed morphological description of <i>Syllis malaquini</i> regenerative abilities. By replicating previous experiments and performing diverse surgical procedures, we explored the capacity of this species for whole-body regeneration. We detailed the precise timing of regeneration of particular structures such as the eyes, proventricle, pharyngeal tooth, nuchal organs, and body pigmentation after amputation. Our high-resolution scanning electron microscopy and confocal laser-scanning microscopy images provide details of the blastema region, revealing that while anal opening remains in connection to the exterior environment, oral opening is formed “<i>de novo</i>” during blastema differentiation. Additionally, we performed amputations to isolate fragments consisting of one, two, and three segments from the intestinal trunk region. We found that <i>S. malaquini</i> requires at least two to three segments to successfully regenerate the whole body. In addition, we verified a variable capacity to regenerate depending upon the gut region, with structures of the foregut greatly impairing some steps of the regenerative process. Our work notably addresses the gap in knowledge concerning gut formation and its impact on regenerative capabilities. Ongoing research is crucial to unravel the role of gut tissue specificity and plasticity during regeneration in annelids, and particularly in syllids.</p>","PeriodicalId":12083,"journal":{"name":"Evolution & Development","volume":"26 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ede.12492","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142461281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A new motile animal with implications for the evolution of axial polarity from the Ediacaran of South Australia 南澳大利亚埃迪卡拉纪一种新的运动动物,对轴向极性的进化具有重要意义。
IF 2.6 3区 生物学
Evolution & Development Pub Date : 2024-09-03 DOI: 10.1111/ede.12491
Scott D. Evans, Ian V. Hughes, Emily B. Hughes, Peter W. Dzaugis, Matthew P. Dzaugis, James G. Gehling, Diego C. García-Bellido, Mary L. Droser
{"title":"A new motile animal with implications for the evolution of axial polarity from the Ediacaran of South Australia","authors":"Scott D. Evans,&nbsp;Ian V. Hughes,&nbsp;Emily B. Hughes,&nbsp;Peter W. Dzaugis,&nbsp;Matthew P. Dzaugis,&nbsp;James G. Gehling,&nbsp;Diego C. García-Bellido,&nbsp;Mary L. Droser","doi":"10.1111/ede.12491","DOIUrl":"10.1111/ede.12491","url":null,"abstract":"<p>Fossils of the Ediacara Biota preserve the oldest evidence for complex, macroscopic animals. Most are difficult to constrain phylogenetically, however, the presence of rare, derived groups suggests that many more fossils from this period represent extant groups than are currently appreciated. One approach to recognize such early animals is to instead focus on characteristics widespread in animals today, for example multicellularity, motility, and axial polarity. Here, we describe a new taxon, <i>Quaestio simpsonorum</i> gen. et sp. nov. from the Ediacaran of South Australia. <i>Quaestio</i> is reconstructed with a thin external membrane connecting more resilient tissues with anterior-posterior polarity, left-right asymmetry and tentative evidence for dorsoventral differentiation. Associated trace fossils indicate an epibenthic and motile lifestyle. Our results suggest that <i>Quaestio</i> was a motile eumetazoan with a body plan not previously recognized in the Ediacaran, including definitive evidence of chirality. This organization, combined with previous evidence for axial patterning in a variety of other Ediacara taxa, demonstrates that metazoan body plans were well established in the Precambrian.</p>","PeriodicalId":12083,"journal":{"name":"Evolution & Development","volume":"26 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142125221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Complex ontogeny of sexual size dimorphism in a female-larger gecko: Implications of determinate growth for lizard body size and life-history evolution 雌性壁虎体型二形的复杂发育过程:确定性生长对蜥蜴体型和生活史进化的影响。
IF 2.6 3区 生物学
Evolution & Development Pub Date : 2024-08-11 DOI: 10.1111/ede.12490
Brandon Meter, Lukáš Kratochvíl, Zuzana Starostová, Tomáš Kučera, Lukáš Kubička
{"title":"Complex ontogeny of sexual size dimorphism in a female-larger gecko: Implications of determinate growth for lizard body size and life-history evolution","authors":"Brandon Meter,&nbsp;Lukáš Kratochvíl,&nbsp;Zuzana Starostová,&nbsp;Tomáš Kučera,&nbsp;Lukáš Kubička","doi":"10.1111/ede.12490","DOIUrl":"10.1111/ede.12490","url":null,"abstract":"<p>Ectothermic vertebrates such as reptiles were assumed to be indeterminate growers, which means that there is no terminal point in time or size for growth in their lifetime. In recent years, evidence for the determinate nature of growth in lizards has accumulated, necessitating a re-examination of models of their ontogeny and evolution of sexual size dimorphism (SSD). In the female-larger gecko <i>Paroedura vazimba</i>, we monitored post-embryonic growth over a period of 15 months. After hatching, females grew faster than males but also reached their final body size, that is, closed growth of their vertebrae, earlier than males. The closure of bone growth in females correlates with the onset of reproductive maturation. We compared this pattern with the previously minutely studied, male-larger species <i>Paroedura picta</i>, where we documented determinate growth as well. We propose a model to explain the evolutionary switches in the direction of SSD in lizards based on bipotential effects of ovarian hormones on growth. In this model, male growth is assumed to require no male-specific growth modifier, such as sex-limited hormonal regulators, while growth is feminized by ovarian hormones in females. Low levels of ovarian hormones can promote bone growth, but high levels associated with maturation of the reproductive organs promote senescence of bone growth plates and thus cessation of bone growth. We suggest that models on growth, life-history and evolution of body size in many lizards should acknowledge their determinate nature of growth.</p>","PeriodicalId":12083,"journal":{"name":"Evolution & Development","volume":"26 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ede.12490","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141916433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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