..................................................................................................................................... 3 Introduction ...................................................................................................................................... 3 Materials and methods ...................................................................................................................... 3 Family Actinoposthiidae Hooge, 2001 ............................................................................................. 4 Genus Philactinoposthia Dörjes, 1968 ...................................................................................... 4 Philactinoposthia coneyi sp. nov. ....................................................................................... 4 Philactinoposthia stylifera brasiliensis subsp. nov. ............................................................ 9 Family Convolutidae Graff, 1905 ................................................................................................... 12 Genus Amphiscolops Graff, 1905 ............................................................................................ 12 Amphiscolops evelinae Marcus, 1947 ............................................................................... 12 Genus Convoluta Ørsted, 1843 ................................................................................................ 12 Convoluta henseni Bohmig, 1895 ..................................................................................... 12 Genus Heterochaerus Haswell, 1905........................................................................................ 14 Heterochaerus sargassi (Hyman, 1939) ........................................................................... 14 Family Haploposthiidae Westblad, 1948 ........................................................................................ 15 Genus Haplogonaria Dörjes, 1968 .......................................................................................... 15 Haplogonaria sophiae sp. nov. ......................................................................................... 15 Genus Kuma Marcus, 1950 ...................................................................................................... 17 Kuma albiventer (Marcus, 1954) ...................................................................................... 17 Genus Kuma Marcus, 1950 ...................................................................................................... 19 Kuma asilhas sp. nov. ....................................................................................................... 19 Family Isodiametridae Hooge and Tyler, 2005 ............................................................................... 22 Genus Archaphanostoma Dörjes, 1968 .................................................................................... 22 Archaphanostoma marcusi sp. nov. .................................................................................. 22