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Re: Jinfengopteryx elegans the troodontid

The _Jinfengopteryx_ specimen also contains small oval structures "reddish
yellow in color" within the body cavity. Ji et al. (2005) offer no firm
conclusions on what they are; they could be ova, but the authors do not seem
too enthusiastic about that conclusion. They could be "seeds or nuts".

http://www.dinosaur.net.cn/database/p_museum.asp?id=28791 shows quite a lot of those. Aren't maniraptorans (at least) supposed to produce and lay only two eggs at once?