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Circumtropical distribution and cryptic species of the meiofaunal enteropneust Meioglossus (Harrimaniidae, Hemichordata).
Defourneaux, Éloïse; Herranz, Maria; Armenteros, Maickel; Sørensen, Martin V; Norenburg, Jon L; Park, Taeseo; Worsaae, Katrine.
Afiliación
  • Defourneaux É; Marine Biological Section, Department of Biology, University of Copenhagen, Universitetsparken 4, DK-2100, Copenhagen, Denmark.
  • Herranz M; Marine Biological Section, Department of Biology, University of Copenhagen, Universitetsparken 4, DK-2100, Copenhagen, Denmark.
  • Armenteros M; Area of Biodiversity and Conservation, Superior School of Experimental Science and Technology (ESCET), Rey Juan Carlos University, C/ Tulipán S/N, 28933, Mostoles, Madrid, Spain.
  • Sørensen MV; Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Av. Joel Montes Camarena S/N, 82040, Mazatlán, México.
  • Norenburg JL; Natural History Museum Denmark, University of Copenhagen, Universitetsparken 15, DK-2100, Copenhagen, Denmark.
  • Park T; Smithsonian National Museum of Natural History, Washington, DC, USA.
  • Worsaae K; Species Diversity Research Division, National Institute of Biological Resources, Hwangyeong-Ro 42, Incheon, 22689, South Korea.
Sci Rep ; 14(1): 9296, 2024 04 23.
Article en En | MEDLINE | ID: mdl-38654022
ABSTRACT
Hemichordata has always played a central role in evolutionary studies of Chordata due to their close phylogenetic affinity and shared morphological characteristics. Hemichordates had no meiofaunal representatives until the surprising discovery of a microscopic, paedomorphic enteropneust Meioglossus psammophilus (Harrimaniidae, Hemichordata) from the Caribbean in 2012. No additional species have been described since, questioning the broader distribution and significance of this genus. However, being less than a millimeter long and superficially resembling an early juvenile acorn worm, Meioglossus may easily be overlooked in both macrofauna and meiofauna surveys. We here present the discovery of 11 additional populations of Meioglossus from shallow subtropical and tropical coralline sands of the Caribbean Sea, Red Sea, Indian Ocean, and East China Sea. These geographically separated populations show identical morphology but differ genetically. Our phylogenetic reconstructions include four gene markers and support the monophyly of Meioglossus. Species delineation analyses revealed eight new cryptic species, which we herein describe using DNA taxonomy. This study reveals a broad circumtropical distribution, supporting the validity and ecological importance of this enigmatic meiobenthic genus. The high cryptic diversity and apparent morphological stasis of Meioglossus may exemplify a potentially common evolutionary 'dead-end' scenario, where groups with highly miniaturized and simplified body plan lose their ability to diversify morphologically.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Filogenia Límite: Animals Idioma: En Revista: Sci Rep Año: 2024 Tipo del documento: Article País de afiliación: Dinamarca 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 Asunto principal: Filogenia Límite: Animals Idioma: En Revista: Sci Rep Año: 2024 Tipo del documento: Article País de afiliación: Dinamarca Pais de publicación: Reino Unido