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Virtual dissection and lifestyle of a 165 -million-year-old female polychelidan lobster.

Authors
  • Jauvion, Clément1
  • Audo, Denis2
  • Charbonnier, Sylvain3
  • Vannier, Jean4
  • 1 Université Claude Bernard Lyon 1, UMR 5276 CNRS, Laboratoire de géologie de Lyon: Terre, Planètes, Environnement, bâtiment GEODE, 2, rue Raphaël Dubois, 69622 Villeurbanne, France; École Normale Supérieure de Lyon, 46, allée d'Italie, 69364 Lyon cedex 07, France. Electronic address: [email protected] , (France)
  • 2 Université de Rennes 1, EA 7316, 263 Avenue du Général Leclerc CS 74205, 35042 Rennes Cedex, France. Electronic address: [email protected] , (France)
  • 3 Muséum national d'Histoire naturelle, Centre de Recherche sur la Paléobiodiversité et les Paléoenvironnements (CR2P, UMR 7207), Sorbonne Universités-MNHN, CNRS, UPMC-Paris 6, 57 rue Cuvier, F-75005 Paris, France. Electronic address: [email protected] , (France)
  • 4 Université Claude Bernard Lyon 1, UMR 5276 CNRS, Laboratoire de géologie de Lyon: Terre, Planètes, Environnement, bâtiment GEODE, 2, rue Raphaël Dubois, 69622 Villeurbanne, France. Electronic address: [email protected] , (France)
Type
Published Article
Journal
Arthropod structure & development
Publication Date
March 2016
Volume
45
Issue
2
Pages
122–132
Identifiers
DOI: 10.1016/j.asd.2015.10.004
PMID: 26577513
Source
Medline
Keywords
License
Unknown

Abstract

Polychelidan lobsters are fascinating crustaceans that were known as fossils before being discovered in the deep-sea. They differ from other crustaceans by having four to five pairs of claws. Although recent palaeontological studies have clarified the systematics and phylogeny of the group, the biology of extant polychelidans and--first of all--their anatomy are poorly documented. Numerous aspects of the evolutionary history of the group remain obscure, in particular, how and when polychelidans colonized the deep-sea and became restricted to it. Surprisingly, the biology of extant polychelidans and the anatomy of all species, fossil and recent, are poorly documented. Here, X-ray microtomography (XTM), applied to an exceptionally well-preserved specimen from the La Voulte Lagerstätte, reveals for the first time vital aspects of the external and internal morphology of Voulteryon parvulus (Eryonidae), a 165-million-year-old polychelidan: 1) its mouthparts (maxillae and maxillipeds), 2) its digestive tract and 3) its reproductive organs. Comparisons with dissected specimens clearly identify this specimen as a female with mature ovaries. This set of new information offers new insights into the feeding and reproductive habits of Mesozoic polychelidans. Contrasting with other Jurassic polychelidans that lived in shallow-water environments, V. parvulus spawned in, and probably inhabited, relatively deep-water environments, as do the survivors of the group.

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