Armadillidium granulatum 'Lemon' is a specific color morph of the Granulated Isopod, a large, hardy woodlouse species popular in the pet trade. This morph features a brown base color with larger, brighter yellow spots compared to the wild-type grey variety. 
 
Key Characteristics
Appearance: The 'Lemon' morph has a brown/light gray body with pronounced, vibrant yellow blotches or spots.
Size: They are one of the larger Armadillidium species, reaching up to 2.5 cm (about 1 inch) in adulthood.
Origin: While selectively bred for color in captivity, the original species is widespread throughout southern Europe (Croatia, France, Greece, Italy, Portugal, Spain, Turkey).
Temperament: Generally shy in small groups, but become more active, even during the day and night, as the colony size increases.
Breeding: They are prolific breeders once established, but need enough space in their enclosure to reproduce well.