Brachymyrmex Patagonicus queen claustral or non-caustral?

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I’m interested in getting a Dark Rover queen but I can not find any information on web searches to tell me if they are caustral or semi-claustral. I’m guessing they are semi-claustral because of how tiny they are, it seems they must need to feed while fertile. But, I do not actually know and can’t seem to find that specific answer in all of the info available on this ant. Thanks in advance!