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Australian Journal of Zoology Australian Journal of Zoology Society
Evolutionary, molecular and comparative zoology
RESEARCH ARTICLE

The chromosomes of the Didelphids Caluromys Lanatus Illiger and Chironectes minimus Zimmerman (Marsupialia : Didelphidae)

E Yunis, E Ramirez, J Cayon and J Hernandez

Australian Journal of Zoology 20(3) 265 - 269
Published: 1972

Abstract

A chromosome study of the didelphiids C. lanatus and Ch. minimus is presented. The karyotype of C. lanatus is very similar to that of Marmosa robinsoni but differs, in so . far as the X chromosome is concerned, from that of C. derbianus. As an explanation for the karyologic difference between the two Caluromys species we postulate a peri- centric inversion of the X chromosome passing from the acrocentric form of C. derbianus to the submetacentric of C. lanatus. The chromosomes of Ch. minimus (2n = 22) are all acrocentric and have a strong similarity to those described in the genera Didelphis and Philander, but the sexual chromosomes are larger and have an XY form of sexual complement.

https://doi.org/10.1071/ZO9720265

© CSIRO 1972

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