A novel endocast technique providing a 3D quantitative analysis of the gastrovascular system in Rhizostoma pulmo: An unexpected through-gut in cnidaria - Université de Montpellier Accéder directement au contenu
Article Dans Une Revue PLoS ONE Année : 2022

A novel endocast technique providing a 3D quantitative analysis of the gastrovascular system in Rhizostoma pulmo: An unexpected through-gut in cnidaria

Massimo Avian
Lucia Mancini
  • Fonction : Auteur
Diego Dreossi
  • Fonction : Auteur
Vanessa Macaluso
  • Fonction : Auteur
Nicole Pillepich
  • Fonction : Auteur
Laura Prieto
  • Fonction : Auteur
Andreja Ramšak
  • Fonction : Auteur
Antonio Terlizzi
  • Fonction : Auteur
Gregorio Motta
  • Fonction : Auteur

Résumé

The investigation of jellyfish gastrovascular systems mainly focused on stain injections and dissections, negatively affected by thickness and opacity of the mesoglea. Therefore, descriptions are incomplete and data about tridimensional structures are scarce. In this work, morphological and functional anatomy of the gastrovascular system of Rhizostoma pulmo (Macri 1778) was investigated in detail with innovative techniques: resin endocasts and 3D X-ray computed microtomography. The gastrovascular system consists of a series of branching canals ending with numerous openings within the frilled margins of the oral arms. Canals presented a peculiar double hemi-canal structure with a medial adhesion area which separates centrifugal and centripetal flows. The inward flow involves only the “mouth” openings on the internal wing of the oral arm and relative hemi-canals, while the outward flow involves only the two outermost wings’ hemi-canals and relative “anal” openings on the external oral arm. The openings differentiation recalls the functional characteristics of a through-gut apparatus. We cannot define the gastrovascular system in Rhizostoma pulmo as a traditional through-gut, rather an example of adaptive convergence, that partially invalidates the paradigm of a single oral opening with both the uptake and excrete function.
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hal-03779478 , version 1 (30-05-2023)

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Massimo Avian, Lucia Mancini, Marco Voltolini, Delphine Bonnet, Diego Dreossi, et al.. A novel endocast technique providing a 3D quantitative analysis of the gastrovascular system in Rhizostoma pulmo: An unexpected through-gut in cnidaria. PLoS ONE, 2022, 17 (8), pp.e0272023. ⟨10.1371/journal.pone.0272023⟩. ⟨hal-03779478⟩
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