Postcranial anatomy and histology of Seymouria, and the terrestriality of seymouriamorphs.

Abstract:

:Seymouria is the best known of the seymouriamorphs, a group of Permo-Carboniferous reptiliomorphs with both terrestrial and aquatic taxa. The majority of research on Seymouria has focused on cranial anatomy, with few detailed descriptions or illustrations of the postcrania. We utilized neutron computed tomography (nCT) and histological sampling to provide updated, detailed figures that clarify details of the postcranial anatomy and to assess the development and histology of Seymouria through specimens from the early Permian Richards Spur locality. The correlation of morphological and histological data indicate rapid metamorphosis in this terrestrially capable stem amniote, with the youngest specimen being postmetamorphic despite being distinctly younger than premetamorphic individuals of Discosauriscus, the only other seymouriamorph to have been histologically sampled. The microanatomical data (e.g., semi-open medullary cavity) also substantiate the hypothesis that Seymouria was terrestrial based on interpretation of external features, although the persistence of a modestly developed medullary spongiosa in comparison to either Discosauriscus or to other co-occurring terrestrial tetrapods suggests additional nuances that require further exploration. In the absence of clearly recognizable postmetamorphic stages in several seymouriamorph taxa, it is difficult to determine the evolutionary trajectory of terrestriality within the clade. Our analysis provides the first histological characterization of the life history of Seymouria and highlights the need for further study of seymouriamorph ontogeny.

journal_name

PeerJ

journal_title

PeerJ

authors

Bazzana KD,Gee BM,Bevitt JJ,Reisz RR

doi

10.7717/peerj.8698

subject

Has Abstract

pub_date

2020-03-10 00:00:00

pages

e8698

issn

2167-8359

pii

8698

journal_volume

8

pub_type

杂志文章

相关文献

PeerJ文献大全
  • The sugarcane mitochondrial genome: assembly, phylogenetics and transcriptomics.

    abstract:Background:Chloroplast genomes provide insufficient phylogenetic information to distinguish between closely related sugarcane cultivars, due to the recent origin of many cultivars and the conserved sequence of the chloroplast. In comparison, the mitochondrial genome of plants is much larger and more plastic and could c...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.7558

    authors: Lloyd Evans D,Hlongwane TT,Joshi SV,Riaño Pachón DM

    更新日期:2019-09-24 00:00:00

  • Comparison of miRNA expression profiles in pituitary-adrenal axis between Beagle and Chinese Field dogs after chronic stress exposure.

    abstract::MicoRNAs (miRNAs), usually as gene regulators, participate in various biological processes, including stress responses. The hypothalamus-pituitary-adrenal axis (HPA axis) is an important pathway in regulating stress response. Although the mechanism that HPA axis regulates stress response has been basically revealed, t...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.1682

    authors: Luo W,Fang M,Xu H,Xing H,Fu J,Nie Q

    更新日期:2016-02-18 00:00:00

  • A systematic review of the direct and indirect effects of herbivory on plant reproduction mediated by pollination.

    abstract:Background:Plant reproduction is influenced by the net outcome of plant-herbivore and plant-pollinator interactions. While both herbivore impacts and pollinator impacts on plant reproduction have been widely studied, few studies examine them in concert. Methodology:Here, we review the contemporary literature that exam...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.9049

    authors: Haas SM,Lortie CJ

    更新日期:2020-06-08 00:00:00

  • BingleSeq: a user-friendly R package for bulk and single-cell RNA-Seq data analysis.

    abstract:Background:RNA sequencing is an indispensable research tool used in a broad range of transcriptome analysis studies. The most common application of RNA Sequencing is differential expression analysis and it is used to determine genetic loci with distinct expression across different conditions. An emerging field called s...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.10469

    authors: Dimitrov D,Gu Q

    更新日期:2020-12-22 00:00:00

  • Genome-wide comparison of four MRSA clinical isolates from Germany and Hungary.

    abstract::Staphylococcus aureus is a drug-resistant pathogen, capable of colonizing diverse ecological niches and causing a broad spectrum of infections related to a community and healthcare. In this study, we choose four methicillin-resistant S. aureus (MRSA) clinical isolates from Germany and Hungary based on our previous pol...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.10185

    authors: Naorem RS,Blom J,Fekete C

    更新日期:2021-01-13 00:00:00

  • Maxent-directed field surveys identify new populations of narrowly endemic habitat specialists.

    abstract:BACKGROUND:Rare or narrowly endemic organisms are difficult to monitor and conserve when their total distribution and habitat preferences are incompletely known. One method employed in determining distributions of these organisms is species distribution modeling (SDM). METHODS:Using two species of narrowly endemic bur...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.3632

    authors: Rhoden CM,Peterman WE,Taylor CA

    更新日期:2017-07-31 00:00:00

  • Aberrant expression of two miRNAs promotes proliferation, hepatitis B virus amplification, migration and invasion of hepatocellular carcinoma cells: evidence from bioinformatic analysis and experimental validation.

    abstract:Background:As key negative regulators of gene expression, microRNAs (miRNAs) play an important role in the onset and progression of hepatocellular carcinoma (HCC). This study aimed to identify the miRNAs involved in HCC carcinogenesis and their regulated genes. Methods:The Gene Expression Omnibus (GEO) dataset (GSE108...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.9100

    authors: Liu Y,Cao Y,Cai W,Wu L,Zhao P,Liu XG

    更新日期:2020-04-29 00:00:00

  • An exploration of the influence of diagonal dissociation and moderate changes in speed on locomotor parameters in trotting horses.

    abstract::Background. Although the trot is described as a diagonal gait, contacts of the diagonal pairs of hooves are not usually perfectly synchronized. Although subtle, the timing dissociation between contacts of each diagonal pair could have consequences on gait dynamics and provide insight into the functional strategies emp...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.2190

    authors: Hobbs SJ,Bertram JE,Clayton HM

    更新日期:2016-06-30 00:00:00

  • Cordycepin inhibits LPS-induced inflammatory and matrix degradation in the intervertebral disc.

    abstract::Cordycepin is a component of the extract obtained from Cordyceps militaris and has many biological activities, including anti-cancer, anti-metastatic and anti-inflammatory effects. Intervertebral disc degeneration (IDD) is a degenerative disease that is closely related to the inflammation of nucleus pulposus (NP) cell...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.1992

    authors: Li Y,Li K,Mao L,Han X,Zhang K,Zhao C,Zhao J

    更新日期:2016-05-10 00:00:00

  • VIRdb: a comprehensive database for interactive analysis of genes/proteins involved in the pathogenesis of vitiligo.

    abstract::Vitiligo is a chronic asymptomatic disorder affecting melanocytes from the basal layer of the epidermis which leads to a patchy loss of skin color. Even though it is one of the neglected disease conditions, people suffering from vitiligo are more prone to psychological disorders. As of now, various studies have been d...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.9119

    authors: Srivastava P,Choudhury A,Talwar M,Mohanty S,Narad P,Sengupta A

    更新日期:2020-05-21 00:00:00

  • Bioinformatics analysis identifies several intrinsically disordered human E3 ubiquitin-protein ligases.

    abstract::The ubiquitin-proteasome system targets misfolded proteins for degradation. Since the accumulation of such proteins is potentially harmful for the cell, their prompt removal is important. E3 ubiquitin-protein ligases mediate substrate ubiquitination by bringing together the substrate with an E2 ubiquitin-conjugating e...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.1725

    authors: Boomsma W,Nielsen SV,Lindorff-Larsen K,Hartmann-Petersen R,Ellgaard L

    更新日期:2016-02-25 00:00:00

  • Maternal inheritance of F1 hybrid morphology and colony shape in the coral genus Acropora.

    abstract:Background:The coral genus Acropora contains more than 150 species with very high morphological diversity. This high diversity may have been caused by repeated hybridization via mass spawning. However, we have little information whether hybrids are formed in these corals. Identifying morphological differences between h...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.6429

    authors: Fukami H,Iwao K,Kumagai NH,Morita M,Isomura N

    更新日期:2019-02-19 00:00:00

  • Immunoglobulin superfamily member 10 is a novel prognostic biomarker for breast cancer.

    abstract:Background:Immunoglobulin superfamily member 10 (IGSF10) is a member of the immunoglobulin superfamily that is expressed at high levels in both the gallbladder and ovary. Currently, the role and possible mechanism of IGSF10 in breast cancer remain unclear. Method:By applying real-time quantitative polymerase chain rea...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.10128

    authors: Wang M,Dai M,Wu YS,Yi Z,Li Y,Ren G

    更新日期:2020-10-21 00:00:00

  • Transgenerational effects of UV-B radiation on egg size, fertilization, hatching and larval size of sea urchins Strongylocentrotus intermedius.

    abstract::Transgenerational effects are important for phenotypic plasticity and adaptation of marine invertebrates in the changing ocean. Ultraviolet-B (UV-B) radiation is an increasing threat to marine invertebrates. For the first time, we reported positive and negative transgenerational effects of UV-B radiation on egg size, ...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.7598

    authors: Ding J,Zhang L,Sun J,Shi D,Chi X,Yang M,Chang Y,Zhao C

    更新日期:2019-08-26 00:00:00

  • The myogenic electric organ of Sternopygus macrurus: a non-contractile tissue with a skeletal muscle transcriptome.

    abstract::In most electric fish species, the electric organ (EO) derives from striated muscle cells that suppress many muscle properties. In the gymnotiform Sternopygus macrurus, mature electrocytes, the current-producing cells of the EO, do not contain sarcomeres, yet they continue to make some cytoskeletal and sarcomeric prot...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.1828

    authors: Pinch M,Güth R,Samanta MP,Chaidez A,Unguez GA

    更新日期:2016-04-14 00:00:00

  • Students distracted by electronic devices perform at the same level as those who are focused on the lecture.

    abstract::Background. Little is known about the characteristics of internet distractions that students may engage in during lecture. The objective of this pilot study is to identify some of the internet-based distractions students engage in during in-person lectures. The findings will help identify what activities most commonly...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.572

    authors: Nalliah RP,Allareddy V

    更新日期:2014-09-16 00:00:00

  • Novel polymeric micelles for insect pest control: encapsulation of essential oil monoterpenes inside a triblock copolymer shell for head lice control.

    abstract:BACKGROUND:Essential oil components (EOCs) are molecules with interesting application in pest control, these have been evaluated against different insect pest from more than 100 years, but their practical use is rather limited. Thus, the enhancement of their bioavailability and manageability due to their dispersion in ...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.3171

    authors: Lucia A,Toloza AC,Guzmán E,Ortega F,Rubio RG

    更新日期:2017-04-20 00:00:00

  • Single nucleotide polymorphism of MTHFR rs1801133 associated with elevated Hcy levels affects susceptibility to cerebral small vessel disease.

    abstract:Background:Methylenetetrahydrofolate reductase (MTHFR) is indispensable for the conversion of homocysteine (Hcy) to methionine. The single nucleotide polymorphism (SNP) of MTHFR gene (rs1801133, C667T) is correlated with decreased enzyme activity that eventually results in elevated plasma Hcy levels. Hyperhomocysteinem...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.8627

    authors: Yuan H,Fu M,Yang X,Huang K,Ren X

    更新日期:2020-02-20 00:00:00

  • Using 3D printed eggs to examine the egg-rejection behaviour of wild birds.

    abstract::The coevolutionary relationships between brood parasites and their hosts are often studied by examining the egg rejection behaviour of host species using artificial eggs. However, the traditional methods for producing artificial eggs out of plasticine, plastic, wood, or plaster-of-Paris are laborious, imprecise, and p...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.965

    authors: Igic B,Nunez V,Voss HU,Croston R,Aidala Z,López AV,Van Tatenhove A,Holford ME,Shawkey MD,Hauber ME

    更新日期:2015-05-26 00:00:00

  • Hindering the illegal trade in dog and cat furs through a DNA-based protocol for species identification.

    abstract::In Western countries dogs and cats are the most popular pets, and people are increasingly opposed to their rearing for the fur industry. In 2007, a Regulation of the European Union (EU) banned the use and trade of dog and cat furs, but an official analytical protocol to identify them as source species was not provided...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.4902

    authors: Garofalo L,Mariacher A,Fanelli R,Fico R,Lorenzini R

    更新日期:2018-06-05 00:00:00

  • Temporal and spatial strategies in an active place avoidance task on Carousel: a study of effects of stability of arena rotation speed in rats.

    abstract::The active place avoidance task is a dry-arena task used to assess spatial navigation and memory in rodents. In this task, a subject is put on a rotating circular arena and avoids an invisible sector that is stable in relation to the room. Rotation of the arena means that the subject's avoidance must be active, otherw...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.1257

    authors: Bahník Š,Stuchlík A

    更新日期:2015-09-22 00:00:00

  • LIMK1/2 inhibitor LIMKi 3 suppresses porcine oocyte maturation.

    abstract::LIMKi 3 is a specific selective LIMK inhibitor against LIMK1 and LIMK2, while LIMK1 and LIMK2 are the main regulators of actin cytoskeleton to participate in many cell activities. However, the effect of LIMKi 3 in porcine oocyte meiosis is still unclear. The present study was designed to investigate the effects of LIM...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.2553

    authors: Jia RX,Duan X,Song SJ,Sun SC

    更新日期:2016-10-12 00:00:00

  • Identification of priority shorebird conservation areas in the Caribbean.

    abstract::Despite being geographically central to the Atlantic Americas Flyway for migratory birds, the Caribbean is often overlooked or underappreciated when addressing the conservation of North American shorebirds. To our knowledge, this is the first Caribbean-wide assessment of shorebird use in the region. We analyzed 211,01...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.9831

    authors: Cañizares JR,Reed JM

    更新日期:2020-09-08 00:00:00

  • The sinemydid turtle Ordosemys from the Lower Cretaceous Mengyin Formation of Shandong, China and its implication for the age of the Luohandong Formation of the Ordos Basin.

    abstract::Chronostratigraphic correlation of terrestrial Early Cretaceous biotas in China is highly problematic due to the lack of marine deposits, few absolute dates, and limited number of index fossils. This often leaves vertebrate faunas as one of the few potential tools for a preliminary biostratigraphy. Taxonomic identity ...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.6229

    authors: Li DQ,Zhou CF,Li L,Yang JT,Li L,Rabi M

    更新日期:2019-01-15 00:00:00

  • The benefits of Tai Chi and brisk walking for cognitive function and fitness in older adults.

    abstract::The purpose of this study was to investigate the benefits of exercises with different cognitive demands for cognitive functions (Executive and non-Executive) in healthy older adults. A cross-sectional design was adopted. In total, 84 healthy older adults were enrolled in the study. They were categorized into the Tai C...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.3943

    authors: Ji Z,Li A,Feng T,Liu X,You Y,Meng F,Wang R,Lu J,Zhang C

    更新日期:2017-10-20 00:00:00

  • Medial knee joint contact force in the intact limb during walking in recently ambulatory service members with unilateral limb loss: a cross-sectional study.

    abstract:BACKGROUND:Individuals with unilateral lower limb amputation have a high risk of developing knee osteoarthritis (OA) in their intact limb as they age. This risk may be related to joint loading experienced earlier in life. We hypothesized that loading during walking would be greater in the intact limb of young US milita...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.2960

    authors: Miller RH,Krupenevich RL,Pruziner AL,Wolf EJ,Schnall BL

    更新日期:2017-02-02 00:00:00

  • Formoterol attenuates increased oxidative stress and myosin protein loss in respiratory and limb muscles of cancer cachectic rats.

    abstract::Muscle mass loss and wasting are characteristic features of patients with chronic conditions including cancer. Therapeutic options are still scarce. We hypothesized that cachexia-induced muscle oxidative stress may be attenuated in response to treatment with beta2-adrenoceptor-selective agonist formoterol in rats. In ...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.4109

    authors: Salazar-Degracia A,Busquets S,Argilés JM,López-Soriano FJ,Barreiro E

    更新日期:2017-12-13 00:00:00

  • Energetics and evasion dynamics of large predators and prey: pumas vs. hounds.

    abstract::Quantification of fine-scale movement, performance, and energetics of hunting by large carnivores is critical for understanding the physiological underpinnings of trophic interactions. This is particularly challenging for wide-ranging terrestrial canid and felid predators, which can each affect ecosystem structure thr...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.3701

    authors: Bryce CM,Wilmers CC,Williams TM

    更新日期:2017-08-17 00:00:00

  • Worldwide scientific productions with immunotherapy of sepsis: a bibliometric analysis.

    abstract:Background:Sepsis represents a significant healthcare problem worldwide and causes a high number of deaths every year but remains to be fully understood. During and after sepsis, the host immune response is complex and involves an initial excessive host inflammatory response to infection that is closely related to tiss...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.7116

    authors: Wan R,Li L,Xing C,Peng R,Gao L

    更新日期:2019-06-17 00:00:00

  • Taxonomic reassessment of the genus Dichotomius (Coleoptera: Scarabaeinae) through integrative taxonomy.

    abstract::Dung beetles of the subfamily Scarabaeinae are widely recognised as important providers of multiple ecosystem services and are currently experiencing revisions that have improved our understanding of higher-level relationships in the subfamily. However, the study of phylogenetic relationships at the level of genus or ...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.7332

    authors: Pardo-Diaz C,Lopera Toro A,Peña Tovar SA,Sarmiento-Garcés R,Sanchez Herrera M,Salazar C

    更新日期:2019-08-05 00:00:00