Traits Taxon list
Omphalonema grandiosum Y.-T. Pan, 1978 †unassessed )Omphalonema intermedium Y.-T. Pan, 1978 †unassessed )Omphalonema magnum Y.-T. Pan, 1978 †unassessed )Omphalonema xinjangensis X.-D. Qiao, 1983 †unassessed )Oriostoma acutum Lindström, 1884 †unassessed )Oriostoma alatum Lindström, 1884 †unassessed )Oriostoma angulifer Lindström, 1884 †unassessed )Oriostoma barrandei Munier-Chalmas, 1876 †Oriostoma bromidensis Rohr & R. A. Johns, 1990 †Oriostoma contrarium Lindström, 1884 †unassessed )Oriostoma coronatum Lindström, 1884 †unassessed )Oriostoma dispar Lindström, 1884 †unassessed )Oriostoma helicinum Lindström, 1884 †unassessed )Oriostoma lineatum Lindström, 1884 †unassessed )Oriostoma nitidissimum Lindström, 1884 †unassessed )Oriostoma roemeri Lindström, 1884 †unassessed )Oriostoma sarydalchaensis Gubanov, Blodgett & Lytochkin, 1995 †Oriostoma wisbyense Lindström, 1884 †unassessed )Semitubina sakoi Kase, 1986 †Semitubina spinosa (Quenstedt, 1852) †Semitubina yukonensis Blodgett, Fryda & Lenz, 2001 †
