Triploidy in Hochstetter's frog,Leiopelma hochstetteri, from New Zealand

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Abstract
Autotriploidy is described in a female of the endemic New Zealand frog Leiopelma hochstetteri. This frog was found to have 3n=33 chromosomes plus 2 supernumerary chromosomes. All the chromosomes in the karyotype of this species contained C-band heterochromatin at the centromeres. A prominent C-band was found to be associated with a secondary constriction on chromosome no. 7. The supernumerary chromosomes in this species appear to be mitotically stable and contain C-band heterochromatin at the centromeres. From the limited data presently available, the triploid individual may have resulted from the fertilisation of a diploid egg produced when the second meiotic division had been suppressed.