Malcolm Wilton-Jones Thanks for the ID bayucca, it looks good to me and the location is on the edge of the Guadalajara, as per your PDF link, with Soria, Burgos and Valladolid all not too far away.
bayucca Cerambycidae, Lamiinae, Dorcadiini, Dorcadion sp. and might be Dorcadion (Iberodorcadion) becerrae? https://apps2.cdfa.ca.gov/publicApps/plant/bycidDB/wdetails.asp?id=30252&w=o http://entomologia.rediris.es/iberodorcadion/BolSEA44_becerrae.pdf
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