Mammary glands in male marsupials. 2.* Development of teat primordia in didelphis virginiana and monodelphis domestica

E. S. Robinson, Marilyn B. Renfree, R. V. Short, J. L. Vandeberg

    Research output: Contribution to journalArticle

    20 Scopus citations

    Abstract

    Young and adults of both sexes of two didelphid marsupials, Didelphis Virginiana and Monodelphis domestica, were examined externally for evidence of mammary gland development. Female young possessed teat numbers typical of adult females (13-15 in D. Virginiana; 11-13 in M. domestica). Male young showed variable teat numbers which were always low compared with females, with the majority possessing 2-4 in anterior positions. Teats were also present in adult males of both species, in similar numbers and locations to those of young males. There are no previous reports of the presence of teats in any adult male marsupials. No mammary primordia in males have been recorded at any stage of development in the most thoroughly studied Australian marsupials. Our findings strengthen the view that there is a dichotomy between the two marsupial lineages in the regulation of male mammary gland expression.

    Original languageEnglish (US)
    Pages (from-to)295-301
    Number of pages7
    JournalReproduction, Fertility and Development
    Volume3
    Issue number3
    DOIs
    StatePublished - Jan 1 1991

    Keywords

    • Opossums
    • Pouch young
    • Scrotum
    • Sexual differentiation

    ASJC Scopus subject areas

    • Biotechnology
    • Reproductive Medicine
    • Animal Science and Zoology
    • Molecular Biology
    • Genetics
    • Endocrinology
    • Developmental Biology

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