Abstract
Marsupials are born in an immature state, followed by prolonged nurturing of pouch young by maternal lactation. Spinal cord sections held in the collections at the Museum für Naturkunde, Berlin were used to test the relationship between structural maturity of the spinal cord and the locomotor challenges that face young marsupials and monotremes. Analysis of variance indicated that body length is a much stronger determinant of variation in anatomical measures of spinal cord maturation than mammal type.
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