Marine echinoid test - species Echinus esculentus Naturally Colore - Biological Architecture - Height: 125 mm - Width: 125 mm- 83 g - (1)

Large-format, magnificently preserved specimen, ideal for scientific and decorative collections. This specimen of Echinus esculentus, commonly known as the common sea urchin, represents an object of great scientific and collector interest. It is the “test” or calcareous shell of the organism, carefully cleaned and preserved. Echinoids, like this urchin, are members of the class Echinoidea within the phylum Echinodermata, characterized by radial pentameric symmetry and a rigid internal skeleton composed of calcareous plates fused together, coated in life with mobile spines. Its formation is a biomineralogical process involving the deposition of calcium carbonate under biological control. Visual analysis reveals a surface that is impeccably intact, with the tubercles bearing the spines (absent in this clean specimen) well defined and evenly distributed. The ambulacral and interambulacral radial bands are clearly visible, testifying to the complex morphological organization of the animal. The transparency, though limited by the opaque material, allows appreciation of the internal structure of the plates. There are no foreign inclusions or signs of alteration on the external surface. This specimen comes from the coastal waters of Cornwall, a region of the United Kingdom renowned for its rich populations of marine fauna. The specific provenance from the cold, oxygenated waters of the North Atlantic contributes to the notable size reached by this species, here exemplified by this magnificent specimen. The formation of such tests naturally occurs over the organism’s life, and its recovery in such intact condition is a fortuitous event that enhances its value. The aesthetic quality of this test is exceptional, mainly thanks to its remarkable natural coloration. The pronounced red-orange radial bands alternate harmoniously with lighter bands, creating a vivid and inherently beautiful color contrast. This pigmentation is not artificial, but reflects natural pigment deposits in the shell, a feature that makes the specimen extremely decorative and easily recognizable. Its almost perfect symmetry and the absence of fractures or significant abrasions elevate it above the average of available specimens. The preservation state is excellent. The test is complete, with no evident chips or restorations. The oral and aboral openings are well defined. It is not mounted on any support, allowing full inspection of the object from every angle. The surface is clean and free of organic residues or marine encrustations, indicating careful, professional preparation. This specimen stands out for its exceptional size (125 mm), well above the average for this species, and for its impeccable condition. It represents a standout collectible piece, not only for malacologists or marine biologists, but also for those who appreciate the intrinsic beauty of natural forms. The combination of size, integrity, and coloration makes it a valuable addition to any natural curiosities collection or a decorative element with a strong visual impact.