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A new sponge from the Marjum Formation of Utah documents the Cambrian origin of the hexactinellid body plan.
Del Mouro, Lucas; Lerosey-Aubril, Rudy; Botting, Joseph; Coleman, Robert; Gaines, Robert R; Skabelund, Jacob; Weaver, James C; Ortega-Hernández, Javier.
Afiliación
  • Del Mouro L; Department of Organismic and Evolutionary Biology and Museum of Comparative Zoology, Harvard University, Cambridge, MA 02138, USA.
  • Lerosey-Aubril R; Institute of Geosciences, University of São Paulo, São Paulo 05508-080, Brazil.
  • Botting J; Department of Organismic and Evolutionary Biology and Museum of Comparative Zoology, Harvard University, Cambridge, MA 02138, USA.
  • Coleman R; Amgueddfa Cymru, National Museum Wales, Cardiff CF10 3NP, UK.
  • Gaines RR; Nanjing Institute of Geology and Palaeontology, Nanjing 210008, People's Republic of China.
  • Skabelund J; Unaffiliated, Round Lake Beach, IL 60073, USA.
  • Weaver JC; Geology Department, Pomona College, Claremont, CA 91711, USA.
  • Ortega-Hernández J; Unaffiliated, Wellsville, UT 84339, USA.
R Soc Open Sci ; 11(9): 231845, 2024 Sep.
Article en En | MEDLINE | ID: mdl-39295920
ABSTRACT
Modern poriferans are classified into four classes-Calcarea, Demospongiae, Hexactinellida and Homoscleromorpha-the recognition of which in fossil specimens almost exclusively relies on spicule morphology and arrangement. Early fossil representatives of the phylum Porifera are morphologically diverse, and many of them problematically display characteristics that are incompatible with the classification scheme developed for modern taxa. Critically, hexactine spicules-a diagnostic feature of hexactinellids among modern taxa-are found in various Cambrian and Ordovician taxa that cannot be accommodated within the hexactinellid body plan. Here we describe a new poriferan from the Drumian Marjum Formation of Utah, Polygoniella turrelli gen. et sp. nov., which exhibits a unique combination of complex anatomical features for a Cambrian form, including a syconoid-like organization, a thick body wall, and a multi-layered hexactin-based skeleton. The hexactinellid-like body wall architecture of this new species supports a Cambrian origin of the hexactinellid body plan and provides valuable insights into character evolution in early glass sponges.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: R Soc Open Sci Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: R Soc Open Sci Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido