A dinosaur tail preserves traces of its burial in the Spanish Pyrenees
A partially joined dinosaur tail from the Spanish Pyrenees retains evidence of limited transport, uneven burial and early mineral cementation. The peer-reviewed fossil study examined vertebrae, tooth grooves and the surrounding sandstone. The marks are consistent with a feeding interaction, but the identity of the animal that made them remains uncertain and the specimen does not reveal how the dinosaur died.
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A tail remains partly joined
A dinosaur tail preserved in sandstone retains signs of limited transport and burial while some connective tissues were still present. This single peer-reviewed study examined a partly articulated tail from Planta del Mestre, a fossil locality in Spain’s southern Pyrenees. The late Cretaceous specimen belonged to a lambeosaurine hadrosaur, a plant-eating duck-billed dinosaur. Its block contains 11 middle tail vertebrae and associated arches, allowing the arrangement of adjoining bones to be studied.[1]
Different surfaces weathered differently
The close arrangement and lack of transport abrasion support limited movement before burial. Mineralized tissue between vertebrae preserves their spacing. More exposed bone surfaces weathered differently from thinner elements, consistent with a tail that sank only partly into soft sediment before later burial. Slight shifts in the farthest vertebrae fit settling and compaction. Because the sandstone block detached from its original outcrop, the wider distribution of the skeleton in the deposit remains unknown.[1]
Grooves and minerals preserve separate clues
Parallel grooves are consistent with teeth contacting the bones during early decay. A blade-toothed meat-eating dinosaur is a possible source, but the precise animal and the distinction between predation and scavenging remain uncertain. Microscopic examination of the surrounding sandstone found early iron-oxide cementation that may have stiffened sediment and sealed bone pores. Direct chemical analysis of the fossil bones was not performed, so the preservation mechanism and its timing remain incompletely constrained.[1]
