Abstract
Estrellichnus jacaensis igen nov., isp. nov. is a large radial trace fossil preserved as hypichnial semireliefs. It occurs in Eocene flysch deposits (depositional lobe facies) of the Hecho Group, north of Jaca in northern Spain. It is interpreted as a subsurface burrow composed of a central shaft and radiating tubular tunnels, produced by an unknown tracemaker. Estrellichnus jacaensis is similar to some extent to Capodistria vettersi Vialov. Estrellichnus jacaensis igen nov., isp. nov. est une grande trace fossile radiale qui se présente sous forme d'hypichnia en semi-relief. Il se rencontre dans les flyschs éocènes (faciès de lobe) du Groupe de Hecho, au nord de Jaca (Nord de l'Espagne). Il est interprété comme un terrier de subsurface composé d'une cheminée centrale et de tunnels tubulaires radiaux, produit par un organisme inconnu. Estrellichnus jacaensis assez relativement semblable à Capodistria vettersi Vialov.
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