About Haplophthalmus danicus Budde-Lund, 1880
Haplophthalmus danicus Budde-Lund, 1880, commonly called the terrestrial cave isopod or spurred ridgeback isopod, is a species of woodlouse that belongs to the family Trichoniscidae. Its native range covers Europe, Southern Asia, and temperate Asia. This species has been introduced to North America, and it was probably brought to the region during the period of early European settlement. As a result, it has become well-established in North American terrestrial communities.