The morphogenesis of the posterior neural tube and tail in Monodelphis domesticus.

Zehr, Kenton J.; Munger, Bryce L.; Jones, Terrell E.

doi:10.1679/aohc.52.95

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…Secondary neurulation has since been described in many vertebrate groups, including lampreys ( Lampetra japonica ), neopterygian fishes (Teleostei, Lepidosteus , Amia ), various sarcopterygian fishes ( Lepidosiren , Protopterus ), frogs ( Xenopus laevis ), birds (chick and quail), and mammals (rat, mouse, opossum, pig, hamster and human) (Kingsbury, 1932;Criley, 1969;Hughes & Freeman, 1974;Schoenwolf & DeLongo, 1980;Balinsky, 1981;Nakao & Ishizawa, 1984;Schoenwolf, 1984;Müller & O'Rahilly, 1987;Zehr et al 1989;Griffith et al 1992;Nievelstein et al 1993;Papan & Campos-Ortega, 1994;Schmitz et al 1994;Hall, 1998;Beck & Slack, 1999). In secondary neurulation, tail bud tissue condenses to form a solid medullary cord (or neural keel) that cavitates (i.e.…”

Section: An Early and Persistent Perspectivementioning

confidence: 99%

Concordia discors: duality in the origin of the vertebrate tail

Handrigan

2003

Journal of Anatomy

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The vertebrate tail is an extension of the main body axis caudal to the anus. The developmental origin of this structure has been a source of debate amongst embryologists for the past century. Some view tail development as a continuation of the morphogenetic processes that shape the head and trunk (i.e. gastrulation). The alternative view, secondary development, holds that the tail forms in a manner similar to limb development, i.e. by secondary induction. Previous developmental studies have provided support for both views. Here I revisit these studies, describing caudal morphogenesis in select vertebrates, the associated genes and developmental defects, and, as a relevant aside, consider the developmental and evolutionary relationships of primary and secondary neurulation.I conclude that caudal development enlists both gastrulation and secondary induction, and that the application of recent high-resolution cell labelling technology may clarify how these discordant programmes interact in building the vertebrate tail.

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Section: An Early and Persistent Perspectivementioning

confidence: 99%

Concordia discors: duality in the origin of the vertebrate tail

Handrigan

2003

Journal of Anatomy

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“…Refer to panel A or table S1 for specific timing differences). Data sourced from the translating time database, as well as others: [16‒19, 26, 28, 30‒81]. A detailed list of the references that pertain to each feature, timepoint, and species can be found in online supplementary Table S1, as well as more detailed somite numbers, and developmental staging (Theiler staging for mouse, Witchi staging for rat, and McCrady staging for opossum).…”

Section: Resultsmentioning

confidence: 99%

Translating the Timing of Developmental Benchmarks in Short-Tailed Opossums (<i>Monodelphis</i><i>domestica</i>) to Facilitate Comparisons with Commonly Used Rodent Models

Bresee,

Litman-Cleper,

Clayton

et al. 2024

Brain Behav Evol

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Introduction: The gray short-tailed opossum, Monodelhis domestica (M. domestica) is a widely used marsupial model species that presents unique advantages for neurodevelopmental studies. Notably their extremely altricial birth allows manipulation of postnatal pups at timepoints equivalent to embryonic stages of placental mammals. A robust literature exists on the development of short-tailed opossums, but many researchers working in the more conventional model species of mice and rats may find it daunting to identify the appropriate age at which to conduct experiments. Methods: Here we present detailed staging diagrams taken from photographic observations of 40 individual pups, in 6 litters, over 25 time points across postnatal development. We also present a comparative neurodevelopmental timeline of short-tailed opossums, the house mouse (Mus musculus), and the laboratory rat (Rattus norvegicus) during embryonic as well as postnatal development, using time points taken from this study and a review of existing literature, and use this dataset to present statistical models comparing the opossum to the rat and mouse. Results: One aim of this research is to aid in testing the generalizability of results found in rodents to other mammalian brains, such as the more distantly related metatherians. However, this broad dataset also allows the identification of potential heterochronies in opossum development compared to rats and mice. In contrast to previous work, we found broad similarity between the pace of opossum neural development with that of rats and mice. We also found that development of some systems was accelerated in the opossum, such as the forelimb motor plant, oral motor control, and some aspects of the olfactory system, while the development of the cortex, some aspects of the retina, and other aspects of the olfactory system are delayed compared to the rat and mouse. Discussion: The pace of opossum development is broadly similar to that of mice and rats, which underscores the usefulness of this species as a compliment to the more commonly used rodents. Many features that differ the most between opossums and rats and mice were either clustered around the day of birth and were features that have functional importance for the pup immediately after or during birth, or were features that have reduced functional importance for the pup until later in postnatal development, given that it is initially attached to the mother.

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The embryo of the silky shrew opossum, Caenolestes fuliginosus (Tomes, 1863): First description of the embryo of Paucituberculata

González

Soria‐Escobar

Rojas‐Díaz³

et al. 2020

Journal of Morphology

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The development of caenolestid marsupials (order Paucituberculata) is virtually unknown. We provide here the first description of Caenolestes fuliginosus embryos collected in the Colombian Central Andes. Our sample of four embryos comes from a single female caught during a fieldtrip at Río Blanco (Manizales, Caldas), in 2014. The sample was processed for macroscopic description using a Standard Event System and for histological descriptions (sectioning and staining). The grade of development of the lumbar flexure and coelomic closure differed between embryos, two of them being more advanced than the others (similar to McCrady's stages 30 and 29, respectively). The pericardial and peritoneal cavities were present, the hepatic anlage was organized in hepatic cords, the heart was in its final position, and the mesonephros was functional. Compared to other Neotropical marsupials, an early appearance of the frontonasal‐maxillary fusion and the cervical growth (thickness) was observed; however, absorption of the pharyngeal arches into the body and lung development was delayed. Besides these differences, embryos were similar to equivalent stages in Didelphis virginiana and Monodelphis domestica. Previous proposals of litter size of four for C. fuliginosus are supported.

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The morphogenesis of the posterior neural tube and tail in Monodelphis domesticus.

Cited by 3 publications

References 20 publications

Concordia discors: duality in the origin of the vertebrate tail

Concordia discors: duality in the origin of the vertebrate tail

Translating the Timing of Developmental Benchmarks in Short-Tailed Opossums (<i>Monodelphis</i><i>domestica</i>) to Facilitate Comparisons with Commonly Used Rodent Models

The embryo of the silky shrew opossum, Caenolestes fuliginosus (Tomes, 1863): First description of the embryo of Paucituberculata

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