Bohn, J. M. and Heß, M. (2014) “The Antarctic holothurian genus Echinopsolus Gutt, 1990 (Dendrochirotida, Cucumariidae): brood pouches, spermatozoa, spermatozeugmata and taxonomic implications”, Zootaxa. Auckland, New Zealand, 3841(4), pp. 573–591. doi: 10.11646/zootaxa.3841.4.7.