HLA9:
The position of the centromere of chromosome HyA29 is unknown, and therefore not reported. Consequently, we could not indicate its fate on the HLA9 chromosome.
HLA11:
It is identical to the corresponding NLE15 chromosome and its centromere is evolutionary new [see also Cardone et al. (2007)] in NLE/SSY/HLA ancestor. In HHO it constitutes the distal part of the HHO12 chromosome. It can be argued that HyA7 was acrocentric, as reported in the Figure.
HLA12:
It was generated by a Robertsonian fusion, with the Nucleolar Organizing Region between them.
It retains the Hylobatidae ancestral form.
Cardone, M.F., Lomiento, M., Teti, M.G., Misceo, D., Roberto, R., Capozzi, O., D'Addabbo, P., Ventura, M., Rocchi, M., and Archidiacono, N. 2007. Evolutionary history of chromosome 11 featuring four distinct centromere repositioning events in Catarrhini. Genomics 90: 35-43.