It appears that that camera was added in Lightroom 5.5. That means there will be support for that camera from version 5.5 onward, but there will be no support for the camera in previous versions. You can upgrade to Lightroom 5 and have that support. Or you can use the DNG converter to create DNG copies of your raw images that you can use in the Lightroom that you have now. Here is the published list of cameras supported by Lightroom and Camera Raw:
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