Family Neocentrophyidae Higgins, 1969 .

Emended diagnosis

Neocentrophyidae, emended diagnosis.

Allomalorhagida with sternal plate on first trunk segment undivided or with partial divisions at the anteriormost region of the plate; remaining trunk segments with one tergal and two sternal plates, except for the terminal segment, consisting of a tergal and a single sternal plate. Articulated rigid lateral terminal spines on segment 11 present or absent; non-articulated middorsal spinose processes on segments 1–9 in both sexes; middorsal spine on the last two segments present or absent, commonly flexible and soft in males, otherwise with middorsal spinose processes; non-articulated midlateral spinose processes on segments 1–9; processes may be absent or present on segments 10 and 11; long and flexible penile spines of males on segments 10 and 11 present or absent; pachycycli, peg and socket joints, and apodemes absent or not well developed; seven placids: four dorsal and three ventral; fourteen trichoscalids (7 dorsal and 7 ventral) present, but trichoscalid plates absent; four short, thin, non-articulated outer oral styles and five longer articulated ones, composed of two units.