Remarks: DOUMENC & VAN PRAËT (1986) discussed the possible specific identity of the single specimen examined without a definitive conclusion. Although in the figure 1 of that paper, the name A. callosa is included, it was probably a mistake during the editorial process of the manuscript. DOUMENC & VAN PRAËT (1986: 63) also reported the presence of four cycles of tentacles, this number of cycles corresponding to 48 tentacles (6+6+12+24). However, the number of tentacles seen in the in situ photographs suggest five cycles. Additional material is needed to study the specific pertinence and other anatomical details.