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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Miranda, Lucilia S. ; Collins, Allen G. ; Hirano, Yayoi M. ; Mills, Claudia E. ; Marques, Antonio C.
Total Authors: 5
Document type: Journal article
Source: PeerJ; v. 4, OCT 27 2016.
Web of Science Citations: 4
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. (AU)

FAPESP's process: 15/23695-0 - Homology relationships in Medusozoa (Cnidaria) based on the anatomy of the different stages of the life cycle
Grantee:Lucília Souza Miranda
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 10/07362-7 - Evolution in Staurozoa: molecular, morphological, cnidome and developmental subsidies
Grantee:Lucília Souza Miranda
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/50484-4 - Biodiversity and distribution patterns of the Medusozoa form the South-Western Atlantic
Grantee:Antonio Carlos Marques
Support type: Regular Research Grants
FAPESP's process: 11/50242-5 - Dimensions of marine life: patterns and process of diversifications in planktonic and benthic cnidarians
Grantee:Antonio Carlos Marques
Support type: BIOTA-FAPESP Program - Thematic Grants