These shots look like Acanthosaura but none I have seen pics of. I don't know about Japalura/Acanthosaura hybrids, don't know enough to know if this is possible. There do seem to be some unknown subspecies that crop up from time to time. Many have thought that perhaps there are species that are not yet identified. Those are some really beautiful animals. Are there many of them of just the ones you have pictured?