Hillichnus agrioensis Pazos et Fernández, 2010

Diagnosis: Hillichnus composed of 4 levels of exposure (Text-fig. 6). Feather/branch- like, almost flat structures (Text-figs 4A, B; 5A, C, F; 6: level 2), with a central tube (Text- fig. 5C, arrow) only visible at level 2 (Text-fig. 6); lateral branches arranged at an angle to each side  (Text-fig. 4B). Branches stright to gently curved (Text-figs 3A, B) or palmate (Text-fig. 5F), variable within specimens (Text-figs 5A, C). In level 3, series of tubes mark the course oft he branches in a deeper level (Text-fig. 6: level 3); in level 2, these series may be isolated at the end of each branch segment (Text-fig. 4B:2). Level 4(Text-fig. 6) comprises lobes with disturbed darksediment (Text- figs 4A:3; 5B: 1) and shows a vertical connection with level 2. Level 1, bearing vertical shafts, is not always present.