Elegant Dionide Trilobite from Valongo Portugal

Description: This specimen exhibits all the hallmark attributes of the best-preserved Valongo trilobites. One is struck immediately by the exquisite preservation, color and aesthetics of this specimen. It is fully prone and inflated, resting comfortably on the matrix.

Valongo trilobites are easily recognized by their ghostly appearance. They have been collected since the 19th century. They are normally compressed, distorted, and the matrix has a slatey appearance. This formation is a monotonous succession of marine silty mudrocks transformed into dark slate by low regional metamorphism.