Hooge M.D. & Rocha C.E.F. 2006 (citation) - P. 41 "Within the genus Otocelis, O. erinae differs from all other described species in having an unpaired ovary. O. erinae is most similar to O. phycophilus Ehlers and Dörjes, 1979 and O. westbladi Ax, 1959, which also have vaginal sphincters and separate male and female gonopores. In contrast to these two species, O. erinae has a slightly curved penis, not a hooked penis, and is without ocelli."
Notes for the valid (accepted) taxonomic name