Species names currently considered to be synonyms:
Oligotrema arcticus Hartmeyer, 1923: synonym of Asajirus arcticus (Hartmeyer, 1923)
Oligotrema indicus (Oka, 1913): synonym of Asajirus indicus (Oka, 1913)
References
^Moreira da Rocha, R.; Gittenberger, A.; Sanamyan, K. (2015). Oligotrema. In: Shenkar, N.; Gittenberger, A.; Lambert, G.; Rius, M.; Moreira Da Rocha, R.; Swalla, B.J.; Turon, X. (2015) Ascidiacea World Database. Accessed through: World Register of Marine Species on 2015-09-10
