Haplophthalmus mengii
- kingdom: Animalia
- phylum: Arthropoda
- class: Malacostraca
- order: Isopoda
- family: Trichoniscidae
- genus: Haplophthalmus
- species: Haplophthalmus mengii
Ogulin
Karlovačka
Croatia
Bremerhaven
Bremen
Steinrode
Thuringia
Germany
Maastricht
Limburg
Netherlands
Falkenberg
Halland
Mörbylånga
Kalmar
Majorna
Västra Götaland
Sweden
Napoli
Kayl