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Comparative internal anatomy of Staurozoa (Cnidaria), with functional and evolutionary inferences

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dc.contributor.author Miranda, Lucília S. en
dc.contributor.author Collins, Allen Gilbert en
dc.contributor.author Hirano, Yayoi M. en
dc.contributor.author Mills, Claudia E. en
dc.contributor.author Marques, Antonio C. en
dc.date.accessioned 2016-11-16T20:05:04Z
dc.date.available 2016-11-16T20:05:04Z
dc.date.issued 2016
dc.identifier.citation Miranda, Lucília S., Collins, Allen Gilbert, Hirano, Yayoi M., Mills, Claudia E., and Marques, Antonio C. 2016. "<a href="https://repository.si.edu/handle/10088/30180">Comparative internal anatomy of Staurozoa (Cnidaria), with functional and evolutionary inferences</a>." <em>PeerJ</em>. 4:e2594. <a href="https://doi.org/10.7717/peerj.2594">https://doi.org/10.7717/peerj.2594</a> en
dc.identifier.issn 2167-8359
dc.identifier.uri https://hdl.handle.net/10088/30180
dc.description.abstract Comparative efforts to understand the body plan evolution of stalked jellyfishes are scarce. Most characters, and particularly internal anatomy, have neither been explored for the class Staurozoa, nor broadly applied in its taxonomy and classification. Recently, a molecular phylogenetic hypothesis was derived for Staurozoa, allowing for the first broad histological comparative study of staurozoan taxa. This study uses comparative histology to describe the body plans of nine staurozoan species, inferring functional and evolutionary aspects of internal morphology based on the current phylogeny of Staurozoa. We document rarely-studied structures, such as ostia between radial pockets, intertentacular lobules, gametoducts, pad-like adhesive structures, and white spots of nematocysts (the last four newly proposed putative synapomorphies for Staurozoa). Two different regions of nematogenesis are documented. This work falsifies the view that the peduncle region of stauromedusae only retains polypoid characters; metamorphosis from stauropolyp to stauromedusa occurs both at the apical region (calyx) and basal region (peduncle). Intertentacular lobules, observed previously in only a small number of species, are shown to be widespread. Similarly, gametoducts were documented in all analyzed genera, both in males and females, thereby elucidating gamete release. Finally, ostia connecting adjacent gastric radial pockets appear to be universal for Staurozoa. Detailed histological studies of medusozoan polyps and medusae are necessary to further understand the relationships between staurozoan features and those of other medusozoan cnidarians. en
dc.relation.ispartof PeerJ en
dc.title Comparative internal anatomy of Staurozoa (Cnidaria), with functional and evolutionary inferences en
dc.type Journal Article en
dc.identifier.srbnumber 140943
dc.identifier.doi 10.7717/peerj.2594
rft.jtitle PeerJ
rft.volume 4
rft.spage e2594
dc.description.SIUnit NH-Vertebrate Zoology en
dc.description.SIUnit NMNH en
dc.citation.spage e2594

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