The cyphophthalmid genus Troglosiro Juberthie, known only from New Cal
edonia, is made the type of a monobasic new family Troglosironidae, th
e plesiomorphic sister group of [Pettalidae + Sironidae]. Five new spe
cies, raveni, juberthei, ninqua, tillierorum and platnicki, are descri
bed.