Document Detail


Mammary glands in male marsupials: I. Primordia in neonatal opossums Didelphis virginiana and Monodelphis domestica.
MedLine Citation:
PMID:  2133544     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Neonates of the American didelphid marsupials Didelphis virginiana and Monodelphis domestica were sexed by karyotype and histologically examined on the day of birth. Mammary anlagen were found in both sexes of both species, but the neonatal males had less than one-third of the full female complement of mammary glands. Male neonates of both species also had paired scrotal bulges anterior to the genital tubercle but these were never present in females, once again raising the question of whether the pouch and scrotum are homologous structures. Mammary anlagen are not found in male neonates of the Australian marsupial species so far studied, which suggests a dichotomy in the control of some aspects of sexual differentiation in the two marsupial lineages.
Authors:
M B Renfree; E S Robinson; R V Short; J L Vandeberg
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Development (Cambridge, England)     Volume:  110     ISSN:  0950-1991     ISO Abbreviation:  Development     Publication Date:  1990 Oct 
Date Detail:
Created Date:  1992-03-20     Completed Date:  1992-03-20     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  8701744     Medline TA:  Development     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  385-90     Citation Subset:  IM    
Affiliation:
Department of Anatomy, Monash University, Clayton, Victoria, Australia.
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MeSH Terms
Descriptor/Qualifier:
Animals
Animals, Newborn / anatomy & histology
Female
Karyotyping
Male
Mammary Glands, Animal / anatomy & histology*,  embryology
Opossums / anatomy & histology*,  embryology
Scrotum / anatomy & histology*,  embryology
Sex Characteristics
Sex Determination (Analysis)
Sex Differentiation / genetics
Species Specificity
Grant Support
ID/Acronym/Agency:
RR01602/RR/NCRR NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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