Acanthocyclops hypogeus is a species of copepod in the family Cyclopidae. It is endemic to Slovenia.
Atlantasellus is a genus of crustaceans, and the only member of the family Atlantasellidae. It contains these species:
Bermudagidiella bermudiensis is a species of crustacean in the family Bogidiellidae. It is the only species in the genus Bermudagidiella, and is endemic to Bermuda.
Carinurella paradoxa is a species of crustacean in family Niphargidae, and the only species in the genus Carinurella. It is found in phreatic waters of the Vipava and Soča rivers in Italy and Slovenia.
Chirocephalus pelagonicus is a species of crustaceans in the family Chirocephalidae. It is endemic to North Macedonia.
Elaphoidella franci is a species of harpacticoid copepod in the family Canthocamptidae. It is found in Europe.
Elaphoidella jeanneli is a species of harpacticoid copepod in the family Canthocamptidae. It is found in Europe.
Haplophthalmus abbreviatus is a species of woodlouse in the family Trichoniscidae. It is found in Europe & Northern Asia.
Imnadia panonica is a species of crustaceans in the family Limnadiidae. It is endemic to Serbia and Montenegro.
Metacyclops postojnae is a species of copepod in the family Cyclopidae.
Monolistra is a genus of isopod crustaceans in the family Sphaeromatidae. Its members are restricted to countries of the former Yugoslavia and neighbouring Italy. It contains the following subgenera and species, four of which are listed as vulnerable (VU) or endangered (EN) on the IUCN Red List:
Monolistra calopyge is a species of isopod in the family Sphaeromatidae.
Monolistra schottlaenderi is a species of isopod in the family Sphaeromatidae.
Monolistra spinosissima is a species of isopod in the family Sphaeromatidae.
Niphargobates is a genus of amphipod crustaceans containing two species from European caves. Niphargobates lefkodemonaki is only known to occur in a cave near Xyloskalo in the Lefka Ori mountains, Crete, Greece. Niphargobates orophobata is only known to occur in caves near Postojna, Slovenia. Both species are listed as vulnerable on the IUCN Red List.
Nitocrella slovenica is a species of harpacticoid copepod in the family Ameiridae.
Nitocrella stochi is a species of harpacticoid copepod in the family Ameiridae.
Proasellus parvulus is a species of isopod in the family Asellidae. It is found in Europe.
Proasellus is a genus of isopod crustaceans in the family Asellidae. Two of its species, P. parvulus and P. slovenicus, are Slovenian endemics which are listed as vulnerable species on the IUCN Red List.
Proasellus slovenicus is a species of isopod in the family Asellidae. It is found in Europe.
