Possum Development: Difference between revisions

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'''Lineage''' ( full )
'''Lineage''' ( full )
cellular organisms; Eukaryota; Fungi/Metazoa group; Metazoa; Eumetazoa; Bilateria; Coelomata; Deuterostomia; Chordata; Craniata; Vertebrata; Gnathostomata; Teleostomi; Euteleostomi; Sarcopterygii; Tetrapoda; Amniota; Mammalia; Theria; Metatheria; Diprotodontia; Phascolarctidae; Phascolarctos
cellular organisms; Eukaryota; Opisthokonta; Metazoa; Eumetazoa; Bilateria; Deuterostomia; Chordata; Craniata; Vertebrata; Gnathostomata; Teleostomi; Euteleostomi; Sarcopterygii; Dipnotetrapodomorpha; Tetrapoda; Amniota; Mammalia; Theria; Metatheria; Diprotodontia


:'''Links:''' [http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&id=38626 Taxonomy Browser Phascolarctos cinereus]
:'''Links:''' [http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&id=9335&lvl=3&lin=f&keep=1&srchmode=1&unlock Taxonomy Browser Phalangeridae]


== Development Overview ==
== Development Overview ==

Revision as of 19:11, 23 May 2016

Embryology - 28 Mar 2024    Facebook link Pinterest link Twitter link  Expand to Translate  
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Introduction

The possums (Phalangeridae) are a family of nocturnal semi-arboreal marsupials including the cuscuses, brushtail possums, and their close relatives.

Common brushtail possum (Trichosurus vulpecula)

Australian Animal: echidna | kangaroo | koala | platypus | possum | Category:Echidna | Category:Kangaroo | Category:Koala | Category:Platypus | Category:Possum | Category:Marsupial | Category:Monotreme | Development Timetable | K12
Historic Australian Animal  
Historic Embryology: 1834 Early Kangaroo | 1880 Platypus Cochlea | 1887 Monotremata and Marsupialia | 1910 Eastern Quoll | 1915 The Monotreme Skull | 1939 Early Echidna

The Hill Collection contains much histology of echidna and platypus embryonic development.

Embryology History | Historic Disclaimer

Other Marsupials  
Monito del Monte Development | Opossum Development

Some Recent Findings

  • Developmental origins of precocial forelimbs in marsupial neonates[1] "Marsupial mammals are born in an embryonic state, as compared with their eutherian counterparts, yet certain features are accelerated. The most conspicuous of these features are the precocial forelimbs, which the newborns use to climb unaided from the opening of the birth canal to the teat. The developmental mechanisms that produce this acceleration are unknown. Here we show that heterochronic and heterotopic changes early in limb development contribute to forelimb acceleration. Using Tbx5 and Tbx4 as fore- and hindlimb field markers, respectively, we have found that, compared with mouse, both limb fields arise notably early during opossum development."
More recent papers
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More? References | Discussion Page | Journal Searches | 2019 References | 2020 References

Search term: Possum Embryology

<pubmed limit=5>Possum Embryology</pubmed>

Taxon

Taxonomy ID: 38626

Genbank common name: koala Inherited blast name: marsupials

Rank: species

Genetic code: Translation table 1 (Standard)

Mitochondrial genetic code: Translation table 2 (Vertebrate Mitochondrial)

Lineage ( full ) cellular organisms; Eukaryota; Opisthokonta; Metazoa; Eumetazoa; Bilateria; Deuterostomia; Chordata; Craniata; Vertebrata; Gnathostomata; Teleostomi; Euteleostomi; Sarcopterygii; Dipnotetrapodomorpha; Tetrapoda; Amniota; Mammalia; Theria; Metatheria; Diprotodontia

Links: Taxonomy Browser Phalangeridae

Development Overview

System Development

The marsupial neonate at birth has a variation between the degree of development of different systems.[2]

  • well-developed - digestive, respiratory and circulatory system.
  • not well-developed - retains fetal excretory system with a fully functional mesonephric kidney and undifferentiated gonads and genitalia.

Oocyte

Ovarian Follicle Development

Marsupial eggs are enclosed by a series of layers:[3]

  • zona pellucida, three zona proteins (ZPA, ZPB, ZPC)
      • an additional extracellular matrix coat that lines the zona pellucida also occurs in some species.
  • mucoid coat
  • outer shell coat.


Links: Oocyte Development

Spermatozoa

Links: Spermatozoa Development

References

  1. <pubmed>21098569</pubmed>
  2. <pubmed>11999321</pubmed>
  3. <pubmed>10729728</pubmed>

Reviews

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Articles

<pubmed></pubmed> <pubmed></pubmed> <pubmed></pubmed>

Books

Search PubMed

Search PubMed: Trichosurus vulpecula | Possum development | marsupial development

External Links

External Links Notice - The dynamic nature of the internet may mean that some of these listed links may no longer function. If the link no longer works search the web with the link text or name. Links to any external commercial sites are provided for information purposes only and should never be considered an endorsement. UNSW Embryology is provided as an educational resource with no clinical information or commercial affiliation.



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Cite this page: Hill, M.A. (2024, March 28) Embryology Possum Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Possum_Development

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G