A new family (Macronicophilidae) is established for Macronicophilus Silvest
ri, 1909, currently placed in Geophilidae. Seven new species of Neotropical
Geophilomorpha are described: Ityphilus saucius n.sp. and I. sensibilis n.
sp. (Ballophilidae), Hyphydrophilus projectus n.sp. and Ribautia onycophaen
a n.sp. (Geophilidae), Macronicophilus abbreviatus n.sp., M. unguiseta n.sp
. and M. venezolanus n.sp. (Macronicophilidae). The hitherto unknown male o
f Schendylops marchantariae (PEREIRA, MINELLI & BARBIERI, 1995) is describe
d and two species (Pectiniunguis geayi (BROLEMANN & RIBAUT, 1911) and Ityph
ilus calinus CHAMBERLIN, 1957 are redescribed from the type and new materia
l. A key to the species of Macronicophilus is provided.