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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/72674
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dc.creatorLucilia Souza Mirandapt_BR
dc.creatorAllen Gilbert Collinspt_BR
dc.date.accessioned2024-08-05T21:19:49Z-
dc.date.available2024-08-05T21:19:49Z-
dc.date.issued2019-04-01-
dc.citation.volume7pt_BR
dc.citation.spage1pt_BR
dc.citation.epage13pt_BR
dc.identifier.doi10.7717/peerj.6693pt_BR
dc.identifier.issn2167-8359pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/72674-
dc.description.resumoThe presence of dark pigment spots associated with primary tentacles (or structures derived from them, i.e., rhopalioids) in Staurozoa was recently overlooked in a study on the evolution of cnidarian eyes (defined as a “region made of photoreceptor cells adjacent to pigment cells”, irrespective of image formation, i.e., including all photoreceptive organs). Review of old and recent literature on Staurozoa shows that dark pigment spots are present in virtually all species of Manania, as well as some species of Haliclystus, Stylocoronella, and probably Calvadosia. The known ultrastructure of ocelli seems to be compatible with light perception, but no immediate response to changes in light intensity have been observed in the behavior of staurozoans. Therefore, although further studies addressing photic behavior are required, we discuss an earlier hypothesis that the dark spots in some stauromedusae may be related to synchronous spawning, as well as the possible sensorial function of rhopalioids. Observations summarized here suggest a possible ninth independent origin of eyes in Cnidaria, within a lineage of benthic medusae. Alternatively, documented similarity across medusae of Cubozoa, Scyphozoa, and Staurozoa—with eyes being topologically associated with primary tentacles in each of these taxa—could indicate shared ancestry and a single origin of eyes in this clade known as Acraspeda. Information on Staurozoa, one of the least studied groups within Cnidaria, is often neglected in the literature, but correctly recognizing the characters of this class is crucial for understanding cnidarian evolution.pt_BR
dc.description.sponsorshipOutra Agênciapt_BR
dc.format.mimetypepdfpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICB - DEPARTAMENTO DE ZOOLOGIApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofPeerJpt_BR
dc.rightsAcesso Abertopt_BR
dc.subject.otherBiodiversidadept_BR
dc.subject.otherTaxonomiapt_BR
dc.subject.otherZoologiapt_BR
dc.subject.otherBiologia marinhapt_BR
dc.subject.otherEvolucao - Estudo e ensinopt_BR
dc.titleEyes in staurozoa (cnidaria): a reviewpt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://peerj.com/articles/6693/pt_BR
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