mystery invert

mystery invert

Observation - mystery invert - UK and Ireland. Description: found adhered to the seat of a compact tractor that has been imported from Japan (although when is unknown and may be a misleading clue). Has the appearance of a trilobite like pupae, yet has multiple chambers inside. Imag0149 shows one of the inverts i

found adhered to the seat of a compact tractor that has been imported from Japan (although when is unknown and may be a misleading clue). Has the appearance of a trilobite like pupae, yet has multiple chambers inside. Imag0149 shows one of the inverts inside although whether this is the original inhabitant or a parasite/secondary inhabitant is unknown. help for this would be appreciated.