Untangling the Gordian knot-further resolving the super-species complex of 300-million-year-old xiphosurids by reconstructing their ontogeny
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The group Xiphosurida (horseshoe "crabs") is today only represented by four species. However, in the fossil record, several dozen species have been described, especially from the Carboniferous (about 300 million years ago). Several species have been interprete... ...
