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09 02, 2021;4 (1): 1028.

Postnatal development in a marsupial model, the fat-tailed dunnart (Sminthopsis crassicaudata; Dasyuromorphia: Dasyuridae).

Laura E Cook, Axel H Newton, Christy A Hipsley, Andrew J Pask
Author Information
  1. Laura E Cook: School of Biosciences, University of Melbourne, Parkville, VIC, Australia. ORCID
  2. Axel H Newton: Department of Anatomy and Developmental Biology, Monash University, Clayton, VIC, Australia.
  3. Christy A Hipsley: School of Biosciences, University of Melbourne, Parkville, VIC, Australia. ORCID
  4. Andrew J Pask: School of Biosciences, University of Melbourne, Parkville, VIC, Australia. ajpask@unimelb.edu.au. ORCID
PMID: 34475507 DOI: 10.1038/s42003-021-02506-2

Abstract

Marsupials exhibit unique biological features that provide fascinating insights into many aspects of mammalian development. These include their distinctive mode of reproduction, altricial stage at birth, and the associated heterochrony that is required for their crawl to the pouch and teat attachment. Marsupials are also an invaluable resource for mammalian comparative biology, forming a distinct lineage from the extant placental and egg-laying monotreme mammals. Despite their unique biology, marsupial resources are lagging behind those available for placentals. The fat-tailed dunnart (Sminthopsis crassicaudata) is a laboratory based marsupial model, with simple and robust husbandry requirements and a short reproductive cycle making it amenable to experimental manipulations. Here we present a detailed staging series for the fat-tailed dunnart, focusing on their accelerated development of the forelimbs and jaws. This study provides the first skeletal developmental series on S. crassicaudata and provides a fundamental resource for future studies exploring mammalian diversification, development and evolution.

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MeSH Term

Animals
Female
Male
Marsupialia
Models, Animal
Skeleton
Journal Article Research Support, Non-U.S. Gov't

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