IRMNG Taxon list
Acyclus inquietus
Atrochus tentaculatus
Collotheca algicola (Hudson, 1886)
Collotheca ambigua (Hudson, 1883)
Collotheca campanulata (Dobie, 1849)
Collotheca cornuta (Dobie, 1849)
Collotheca coronetta (Cubitt, 1869)
Collotheca edentata (Collins, 1872)
Collotheca gracilipes Edmondson, 1939
Collotheca hepatabrachia (Schoch, 1869)
Collotheca libera (Zacharias, 1894)
Collotheca mutabilis (Hudson, 1885)
Collotheca ornata (Ehrenberg, 1832)
Collotheca pelagica (Rousselet, 1893)
Collotheca spinata (Hood, 1893)
Collotheca tenera Edmondson, 1939
Collotheca triloba (Collins, 1872)
Collotheca vargae Nogrady, 1976
Cupelopagis bipera
Cupelopagis bucinedax
Cupelopagis vorax (Leidy, 1857)
Stephanoceros eichhorni
Stephanoceros fimbriatus (Goldfuze, 1820)
Stephanoceros millsii accepted as Stephanoceros fimbriatus (Goldfuze, 1820)
Stephanoceros vulgaris