Nitellopsis

Nitellopsis is a genus of charophyte green algae. Some sources, including AlgaeBase, place it in the family Feistiellaceae. Others place it in the family Characeae.

Species
, AlgaeBase listed the following species:
 * Extant
 * Nitellopsis obtusa (Desvaux) J.Groves
 * Nitellopsis sarcularis J.S. Zaneveld
 * Extinct
 * †Nitellopsis aemula (Grambast) Grambast & Soulié-Märsche
 * †Nitellopsis dutemplei (Watelet) Grambast & Soulié-Märsche
 * †Nitellopsis etrusca (M.Tongiorgi) Grambast & Soulié-Märsche
 * †Nitellopsis exilis Glukovskaja
 * †Nitellopsis globula (Mädler) Grambast & Soulié-Märsche
 * †Nitellopsis helicteres (Brongniart) Grambast & Soulié-Märsche
 * †Nitellopsis helvetica (Mädler) Grambast & Soulié-Märsche
 * †Nitellopsis houi (Shui Wang) Grambast & Soulié-Märsche
 * †Nitellopsis huangii (Y.H.Lu) Grambast & Soulié-Märsche
 * †Nitellopsis ixtapensis (E.F.K.Daily & Durham) Grambast & Soulié-Märsche
 * †Nitellopsis major (Grambast) Grambast & Soulié-Märsche
 * †Nitellopsis merianii (Unger) Grambast & Soulié-Märsche
 * †Nitellopsis morulosa (Feist-Castel) Feist-Castel & N.Grambast
 * †Nitellopsis ovalis (G.D.Yang) Feist-Castel & N.Grambast
 * †Nitellopsis ovata Krassavina
 * †Nitellopsis palaeohungarica (Rásky) Grambast & Soulié-Märsche
 * †Nitellopsis sigalii (Grambast) Grambast & Soulié-Märsche
 * †Nitellopsis supraplana (Peck & Reker) Grambast & Soulié-Märsche
 * †Nitellopsis thaleri (Castel & Grambast) Grambast & Soulié-Märsche
 * †Nitellopsis usboensis (Maslov) Grambast & Soulié-Märsche
 * †Nitellopsis wangii (Shui Wang) Grambast & Soulié-Märsche
 * †Nitellopsis wonnacottii (Grambast) Grambast & Soulié-Märsche