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. 2016 May 5;4:e1951. doi: 10.7717/peerj.1951

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© 2016 Miranda et al.

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.

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Craterolophus convolvulus: (A) absence of primary tentacles and anchors (indicated by black arrow) between arms; Calvadosia cruciformis: (B) presence of primary tentacles (pt); Manania uchidai: (C) anchors (an) with a knobbed remnant of primary tentacles; Depastromorpha africana: (D) anchors (an) with a knobbed remnant of primary tentacles; Haliclystus tenuis: (E) anchors (an). Photo credit: Lucília Miranda.