translamellatus), absence of prolamellar lines (present, not reaching insertions of rostral setae in P translamellatus), longer setae [p.sub.1] (minute in P translamellatus) and elongate openings of sacculi
Sa, SI (rounded in P translamellatus).
PNH also causes a loss of hair cells in the crista ampullaris, the macula utriculi, and the macula sacculi
, and a marked degeneration of the stria vascularis.
The diagnostic characters of Perscheloribates are as following: rostrum rounded; lamellae well developed; prolamellae present, absent or partially developed; translamellar lines usually absent, but rarely incompletely present; interlamellar setae long; sensilli with dilated head; pteromorphs immovable; notogaster with 10 pairs of setae or their alveoli; four pairs of sacculi
on notogaster; four pairs of genital setae; lyrifissures iad adanal; legs monodactylous (e.g., Hammer 1973; Corpuz-Raros 1980).